microtech ii centrifugal chiller protocol information...refrigerating and air-conditioning engineers...

Engineering Data ED 15062-0

Group: Controls

Date: January 2003

© 2003 McQuay International

MicroTech II™Chiller Unit ControllerProtocol Information

LONWORKS® NetworksBACnet® Networks

• WSC Water-Cooled Centrifugal, Single-Compressor

• WDC Water-Cooled Centrifugal, Dual-Compressor

• WPV Water-Cooled Centrifugal, Single-Compressor

• AGZ Air-Cooled Global Scroll, Single- and Double-Compressor

• ACZ Air-Cooled Scroll Condensing Unit, Single- and Double-Compressor

• WGZ Water-Cooled Global Scroll

• AGS Air-Cooled Global Screw

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ContentsLimited Warranty .................................................................................................................................. 2Introduction............................................................................................................................ 4Protocols ................................................................................................................................ 5BACnet Networks ................................................................................................................................. 5LonWorks Networks ........................................................................................................................... 10Typical Minimum Integration.............................................................................................. 15Comprehensive Data Point Tables .................................................................................... 16Detailed Data Point Information......................................................................................... 20Alarms .................................................................................................................................. 56Appendix A: Protocol Implementation Conformance Statement ................................... 72Index ..................................................................................................................................... 76

FiguresFigure 1. HTTP Home Page .................................................................................................................. 7Figure 2. Singly Terminated Free Topology ....................................................................................... 11Figure 3. Combining Network Segments with a Repeater .................................................................. 12Figure 4. Doubly Terminated Network Topology............................................................................... 12

Limited WarrantyConsult your local McQuay Representative for warranty details. Refer to Form 933-43285Y. To findyour local McQuay Representative, go to www.mcquay.com.

Revision HistoryED 15062-0 January 2, 2003 Preliminary release.

NoticeCopyright © 2003 McQuay International, Minneapolis MN. All rights reserved throughout the world.McQuay International reserves the right to change any information contained herein without priornotice. The user is responsible for determining whether this software is appropriate for his or herapplication.®™ The following are trademarks or registered trademarks of their respective companies. BACnet is a registered trademark of the AmericanSociety of Heating, Refrigerating and Air-Conditioning Engineers, Inc. Echelon, LONWORKS, LONMARK, LonTalk, and Neuron are registeredtrademarks of Echelon Corporation. Windows is a registered trademark of Microsoft Corporation. McQuay registered is a trademark andMicroTech II is a trademark of McQuay International.

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Software RevisionThis edition documents the following versions of the standard MicroTech II™ Communicationmodule software and all subsequent revisions until otherwise indicated. However, if your software isof a later revision, some of the information in this document may not completely describe yoursoftware.Software RevisionLONWORKS Communication Module Firmware CHCHLA20BACnet Communication Module Firmware BCM.EXE (Rev 3.09)

Reference DocumentsNumber Company Title

078-0014-01E LONMARK® Interoperability Association LONMARK Layers 1–6 Interoperability Guidelines,Version 3.0

078-0120-01E LONMARK Interoperability Association LONMARK Application Layer InteroperabilityGuidelines, Version 3.2

078-0156-01G Echelon® Corporation LONWORKS FTT-10A Free Topology TransceiverUsers Guide

8040 LONMARK Interoperability Association LONMARK Functional Profile: Chiller, Version 1.0

ANSI/ASHRAE 135-2001 American Society of Heating,Refrigerating and Air-ConditioningEngineers

BACnet® A Data Communication Protocol forBuilding Automation and Control Networks

IM 735 McQuay International MicroTech II Chiller Unit Controller LONWORKSCommunication Module

IM 736 McQuay International MicroTech II Chiller Unit Controller BACnetCommunication Module

IMM AGS-1 McQuay International MicroTech II Air-Cooled Screw Chiller Installationand Maintenance Manual

IOMM ACZ/AGZ-3 McQuay International MicroTech II Air-Cooled Condensing UnitInstallation, Operation, and Maintenance Manual

IOMM ACZ1 McQuay International MicroTech II Air-Cooled Condensing UnitInstallation, Operation, and Maintenance Manual

IOMM AGZ-4 McQuay International MicroTech II Air-Cooled Scroll ChillerInstallation, Operation, and Maintenance Manual

IOMM WGZ-1 McQuay International MicroTech II Water-Cooled Scroll ChillerInstallation Manual

IOMM WPV McQuay International MicroTech II Centrifugal Chiller Installation,Operation, and Maintenance Manual

IOMM WSCWDC-2 McQuay International MicroTech II Chiller Unit Controller Installation,Operation, and Maintenance Manual

OM AGS-2 McQuay International MicroTech II Air-Cooled Screw Chiller OperatingManual

OM CentrilMicro II McQuay International MicroTech II Unit Controller for CentrifugalChillers and Templifiers Operating Manual

Note: McQuay International documents are available at http://www.mcquay.com/.

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Introduction

This document contains the necessary information to incorporate a MicroTech II™ Chiller UnitController from McQuay International into your Building Automation System (BAS). It includes allnecessary BACnet® properties, LONWORKS® variables, and corresponding MicroTech II ChillerUnit Controller data points. It also contains the BACnet Protocol Implementation and ConformanceStatement. BACnet and LONWORKS terms are not defined. Refer to the appropriate specifications andfunctional profile for definitions and details.

Chiller ModelsThe following table lists the model designators of McQuay International Chiller units and thecorresponding description.WSC Water-Cooled Single-Compressor CentrifugalWDC Water-Cooled Dual-Compressor CentrifugalWPV Water-Cooled Single-Compressor CentrifugalAGZ Air-Cooled Global ScrollACZ Air-Cooled Scroll Condensing UnitWGZ Water-Cooled Global ScrollAGS Air-Cooled Global Screw

Controller Data PointsThe MicroTech II Chiller Unit Controller contains data points or unit variables that are accessiblefrom as many as four user interfaces: the unit keypad/display, the Operator Interface Touch Screen, aBACnet network (BACnet/IP Ethernet or MSTP), or a LONWORKS network. Not all points areaccessible from each interface. This manual lists all important data points and the corresponding pathfor each network interface. Refer to the applicable Operation Manual for keypad/display andOperator Interface Touch Screen details . Reference Documents on page 3 for manual part numbers.

Protocol DefinitionsThe MicroTech II Chiller Unit Controller can be configured in either an interoperable BACnet orLONWORKS network. The controller must have the corresponding network communication moduleinstalled. There are two network communication modules: BACnet and LONWORKS. The BACnetcommunication module accommodates BACnet/IP, BACnet over Ethernet, and BACnet MS/TPprotocols. The LONWORKS module functions in accordance with the LONMARK Chiller Controllerfunctional profile.

BACnet ProtocolThe BACnet protocol is a standard communication protocol for Building Automation and ControlNetworks developed by the American National Standards Institute and American Society of Heating,Refrigerating and Air-conditioning Engineers (ASHRAE) specified in ANSI/ASHRAE Standard135 2001. It addresses all aspects of the various systems that are applied to building control systems.BACnet provides the communication infrastructure necessary to integrate products manufactured bydifferent vendors and to integrate building services that are now independent.

LONWORKS NetworkA control network specification for information exchange built upon the use of LonTalk® fortransmitting data. The LonTalk Protocol was developed and is owned by the Echelon® Corporation.It describes how information should be transmitted between devices on a control network.

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Protocols

BACnet NetworksCompatibility

The MicroTech II Chiller Unit Controller conforms to the BACnet Standard (ANSI/ASHARE 135-2001) as stated in the Protocol Implementation and Conformance Statement (PICS) (See BACnetProtocol Implementation Conformance Statement on page 72.).

BACnet ObjectsMicroTech II Chiller Unit Controllers incorporate standard BACnet object types (i.e., object typesdefined in the BACnet Standard). Each object has properties that control unit variables or data points.Some object types occur more than once in the unit controller; each occurrence or instance hasdifferent property values and controls different unit variables or data points. Each instance isdesignated with a unique instance index. Some properties can be adjusted (read/write properties, e.g.,setpoints) from the network and others can only be interrogated (read-only properties, e.g., statusinformation).Each data point accessible from a BACnet network is described with a table that gives the ObjectIdentifier, Property Identifier, Full BACnet Reference or path, and the Name enumeration of theproperty.

Example of BACnet Data Point

Variable DetailsObject Identifier Property Identifier

Object Type Type Enumeration Instance Property Name Property EnumerationAnalog Input 0 3 Present Value 85

Full ReferenceMTII Chiller UC ####.EntCondWaterTemp.Present_Value

Object IdentifierObject Identifiers are each designated with an Object type as defined in the BACnet specification.The first column of the data point definition gives the object type. This object happens to be theEntering Condenser Water Temperature.The object identifier is a property of the object that you can read from the object. The name of theproperty is “Object_Identifier” and the property identifier is 75.Each object in a chiller controller has a unique identifier. BACnet object identifiers are two-partnumbers of BACnet Object Identifier data type. The first part identifies the object type (the first 10bits of the 32-bit BACnet Object Identifier [See ANSI/ASHRAE 135-2001 BACnet A DataCommunication Protocol for Building Automation and Control Networks]). The first column of thedata point definition gives the object type. The second part identifies the instances of that particularobject type (the last 22 bits of the 32-bit BACnet Object Identifier).The object identifier is shown in the data points listing as two numbers. The first number is shown inthe Type ID column and designates the Object type enumeration. The second number is shown in theInstance column and designates the instance of that particular object type.The object identifier is a property of the object that you can read from the object code. The name ofthe property is “Object_Identifier” and the property identifier is 75. The ASHRAE BACnetspecification reserves the first 128 numbers for ASHRAE defined objects. Manufactures may defineadditional object types and assign a number above 127 as long as they conform to the requirements ofthe ASHRAE BACnet specification.

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Each object also has a name. Object names are character strings. The object name is a property of theobject that you can read from the object. The name of the property is “Object_Name” and theproperty identifier is 77.Objects are sometimes referred to as an object type and instance number as they are in the BACnetspecification. The example object above would be: Analog Input, Instance 3.

Property IdentifierEach object has a number of properties or attributes. Each property has a unique identifier of BACnetProperty Identifier data type. Property identifiers are an enumerated set; a number identifies eachmember. The value of the Property Identifier enumeration is shown in the Property ID column. In theexample above the property identifier is 85.

Property NameEach property also has a unique name. Property names are character strings and shown in theProperty Name column. In the example above the property name is Present Value.

Full ReferenceThe full reference is the path of the property within the network where the MicroTech II Chiller UnitController resides. It is a character string equivalent to the object identifier and the propertyidentifier. In the example above the full reference isMTII Chiller UC ####.EntCondWaterTemp.Present_Value.

Enumerated ValuesSome properties are standard data types and some are enumerated sets. If the property value is anenumerated set, all enumerated values and corresponding meaning are given in the Enumerationcolumn of the data point listing.

MicroTech II Chiller Unit Controller Device ObjectEach BACnet compatible device must have one and only one BACnet Device Object.

Device Object IdentifierThe MicroTech II Chiller Unit Controller Device Object Identifier uniquely specifies the unit withinthe network. The device object type for all devices is fixed by ASHRAE at 8. Therefore the deviceobject instance number must be unique. The initial Device Object identifier is set at 3000 duringmanufacturing. The device object identifier can be read from the unit controller. The name of theproperty is “Object_Identifier” and the property identifier is 75.

Caution: If another device in the network already has this object identifier (instance number),you must change the instance number of one device object, so that all devices in thenetwork have a unique device identifier.

Device Object NameThe Device Object Name uniquely specifies a device in the network. It must be unique in thenetwork. The device name for the MicroTech II Chiller Unit Controller device isMTII Chiller UC ####. The #### represents the device object instance number. The device name isthe “prefix” of all object names in the MicroTech II Chiller Unit Controller. All objects include thedevice name and a period “.” (MTII Chiller UC ####.) preceding the object name. The device objectinstance number assigned at manufacturing is 3000.

Note: If you change the device instance in the HTTP Interface, you also change the device nameand thus the full reference for all objects in the unit controller.

The Device Object name is also available to the network in the device. The property name is“Object_Name” and property identifier is 77.

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HTTP ServerThe MicroTech II BACnet Communication Module incorporates a minimal HTTP server for settingcertain network variables. Figure 1 shows the home page of the HTTP Interface. It has six areas ofinformation: three BACnet areas and three network areas. The relevant configuration parametersdepend on the BACnet data link layer of the BAS network.

Figure 1. HTTP Home Page

You can access the home page with Internet Explorer at its IP address. In order to access theconfiguration page, your computer must be on the same subnet as the communication module. Firstchange the network settings on your computer and the options in Internet Explorer, access theconfiguration page to make the changes to the communication module parameters, and finally changethe network settings of your computer Internet Explorer options back to the way they were. If youselect the Configure button, you can change the parameters after you enter a password. See theBACnet Communication Module Installation Manual for detailed instructions.Each section of the HTTP Interface page controls a different function on the network. Each section isdescribe below.

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DeviceDevice InstanceThe device instance identifies the communication module device on the BAS BACnet network. TheMicroTech II BACnet Communication module ships from the factory with a default device instanceof 3000. You can change the device instance in the HTTP Interface.

Caution: If another device in the network already has this device instance, you must change theinstance number of one device object, so that all devices in the network have a uniquedevice identifier.

Note: Changing the device instance of the Device Object changes the full reference of all objectsbecause each full reference includes the instance number of the Device Object> See FullReference on page 6.

LAN TypeThe LAN Type parameter identifies the Data Link/Physical layers of the BAS network. The DataLink/Physical layers available are Ethernet, BACnet/IP, and MS/TP.

Client TimeoutThe Client Timeout parameter indicates the time that the BCM waits for a response when it sends analarm notification the specified device. The available Client Timeout choices are Normal and BusyNetwork.

Who-Is FrequencyThe Who-Is Frequency parameter indicates the maximum rate at which the BCM can send Who-Isrequests to identify unknown devices. This parameter is an integer.

Date/TimeThe Date/Time parameters indicate local time, the time difference between local time and UniversalCoordinated Time (UTC) expressed in minutes, and whether the controller is in a daylight savingsperiod. Setting these parameters is only necessary when the BAS network does not have a TimeMaster controller on the network.

AlarmsEnabledThe Enabled parameter indicates whether Alarm Annunciation method of alarm notification has beenenabled. See on BACnet Alarm page 56.

Note: If the BACnet device cannot recognize an Alarm Annunciation message, the BAS can pollthe unit controller for alarms. See BACnet Alarm on page 56.

Alarm Destination Device InstanceThe Alarm Destination Device Instance parameter indicates the BACnet device in the networkreceiving the alarm notification annunciation.

Alarm Destination Process IDThe Alarm Destination Process ID parameter identifies the process the device receiving the alarmnotification annunciation executes after it receives the alarm notification.

Alarm PriorityThe Alarm Priority parameters indicate the priority for each class of alarms. Priority values rangefrom 0 to 255. Smaller priority values indicate higher priority.

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EthernetThe Ethernet parameter indicates the Ethernet MAC address of the MicroTech II BACnetCommunication Module. The Ethernet address of the communication module was assigned when itwas manufactured. It is fixed and cannot be changed. Use this address to access the BACnetCommunication Module on a BACnet over Ethernet network.

BACnet/IPThe BACnet/IP parameters indicate the Internet Protocol parameters for the MicroTech II BACnetCommunication Module. The UDP Port, IP address, subnet mask, and IP router address are variablesthat must be set during the communication module configuration. The BACnet default UDP Port is47808 (BAC0 in Hex). This value may be changed at the BAS integrators discretion.

MS/TPThe MS/TP parameters indicate MS/TP network parameters for the MicroTech II BACnetCommunication Module. The MAC Address, Max Masters, Max Info Frames, and Baudrate arevariables and must be set during the communication module configuration.

MAC AddressThe MAC Address parameter indicates the MAC (Media Access Control) address or uniquehardware number of the MicroTech II BACnet Communication Module on the MS/TP network.Max MastersThe Max Masters parameter indicates the maximum number of devices designated master on theMS/TP network.

Max Info FramesThe Max Info Frames parameter indicates the maximum number of frames the MicroTech II BACnetCommunication Module can send before it must pass the token.

BaudrateThe Baudrate parameter indicates the data transmission rate expressed in bits per second (bps) on thenetwork. It must be the same for all devices on the network. There are a limited number of baud ratesavailable to select.

Network Considerations

Access to PropertiesTo access a property, you must specify the object identifier including the device object identifier orthe object name including the device object name and the property identifier.

Configuring the Unit ControllerThe MicroTech II Chiller Unit Controller and the MicroTech II BACnet Communication Moduletogether are designed, programmed, and configured at the factory to be a chiller unit controlleraccessible over a BACnet network. No additional programming is required to make this a chiller unitcontroller. The unit controller is ready to operate with the default values of the various parameters setat the factory. Default values may be changed with the unit keypad or via the network. Parametersmust be adjusted in the HTTP Interface to accommodate your particular network. See the appropriateoperation manual for default values and keypad operating instructions and the MicroTech BACnetCommunication Module Installation Manual. See Reference Documents for part numbers. Thisdocument specifies default values for variables accessible from the network.

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LONWORKS NetworksLONWORKS technology, developed by Echelon Corporation, is the basis for LONMARK®Interoperable Systems. This technology is independent of the communication media. The LONMARKInteroperable Association has developed standards for interoperable LONWORKS technology systems.In particular they have published standards for HVAC equipment including the Chiller Functionalprofile. This profile specifies a number of mandatory and optional standard network variables andstandard configuration parameters. This manual defines the variables and parameters available in theMicroTech II Chiller Unit Controller.

CompatibilityThe MicroTech II Chiller Unit Controllers with the LONWORKS communication module operates inaccordance with the Chiller Functional profile of the LONMARK Interoperability Association.

LONWORKS VariablesMicroTech II Chiller Unit Controllers incorporate LONWORKS network variables to access unit datapoints. The controller uses LONWORKS Standard Network Variable Types (SNVT) from the profile.Some data points can be adjusted (input network variables, nvi) (read/write attributes, e.g., setpoints)from the network and others can only be interrogated (output network variables, nvo) (read onlyattributes, e.g., status information). Configuration variables (nci) are included with the input networkvariables.Each data point accessible from a LONWORKS network is described with a table that gives theLONWORKS Name, Profile, SNVT Type, and SNVT Index. If the variable is a configuration variablethe table also includes the SCPT (Standard Configuration Parameter Type) Reference and the SCPTIndex.

Example of LONWORKS Data PointLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoSuctionTemp Proprietary temp_p 105 two bytes

LONWORKS NameEach network variable has a name that you use to access the data point. This is the name of thevariable from the profile. In the example above, the name of the variable is nvoSuctionTemp.

ProfileThe profile column designates whether the variable is defined in the LONMARK Chiller functionalprofile or is a proprietary variable. The variable itself may not be a standard component of the profile,but the unit controller implements it and it is available to the network.

SNVT TypeThis column gives the name of the standard network variable type from the master list. In theexample above, the SNVT is SNVT_temp_p.

SNVT IndexThis column gives the Index of the standard network variable type from the master list. In theexample above, the SNVT Index is 105.

SNVT SizeThis column gives the size of the standard network variable type in number of bytes. In the exampleabove, the SNVT Size is two bytes.

SCPT ReferenceThis column gives the name of the Standard Configuration Parameter Type (SCPT) from the masterlist.

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SCPT IndexThis column gives the Index of the Standard Configuration Parameter Type (SCPT) from the masterlist.

Network Considerations

Network TopologyEach MicroTech II LONWORKS Communication Module is equipped with an FTT-10A transceiverfor network communication. This transceiver allows for (1) free topology network wiring schemesusing twisted pair (unshielded) cable and (2) polarity insensitive connections at each node. Thesefeatures greatly simplify installation and reduce network commissioning problems. Additional nodesmay be added with little regard to existing cable routing.

Free Topology NetworksA LONWORKS “free topology network” means that devices (nodes) can be connected to the networkin a variety of geometric configurations. For example, devices can be daisy-chained from one deviceto the next, connected with stub cables branching off from a main cable, connected using a tree orstar topology, or any of these configurations can be mixed on the same network. As shown in Figure2. Free topology segments require termination for proper transmission performance. Only onetermination is required. It may be placed anywhere along the segment. Refer to EchelonLONWORKS FTT-10A Transceiver User’s Guide. See Reference Documents for part number.Free topology networks may take on the following topologies:• Bus• Ring• Star• Mixed - Any combination of Bus, Ring, and Star

Note: A Limitations to wire lengths apply and must be observed.

Figure 2. Singly Terminated Free Topology

Termination

Star Topology

Termination

Ring Topology

Termination

Singly Terminated Bus TopologyStub

}

Termination

Mixed Topology

A network segment is any part of the free topology network in which each conductor is electricallycontinuous. Each of the four diagrams in is a illustration of a network segment. Some applicationsmay require two or more segments; see “Free Topology Restrictions.” If necessary, segments can bejoined with FTT-10A-to-FTT-10A physical layer repeaters. See Figure 3. Refer to EchelonLONWORKS FTT-10A Transceiver User’s Guide. See Reference Documents for part number.

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Figure 3. Combining Network Segments with a Repeater

Termination Termination

FTT-

10A

FTT-

10A

Free Topology RestrictionsAlthough free topology wiring is very flexible, there are restrictions. A summary follows, refer to theEchelon FTT-10A User’s Guide for details. See Reference Documents for part number.1. The maximum number of nodes per segment is 64.2. The maximum total bus length depends on the wire size:

Wire Size Maximum Node-to-Node Length Maximum Cable Length24 AWG 820 ft (250 m) 1476 ft (450 m)22 AWG 1312 ft (400 m) 1640 ft (500 m)16 AWG 1640 ft (500 m) 1640 ft (500 m)

The longest cable path between any possible pair of nodes on a segment must not exceed themaximum node-to-node distance. If two or more paths exist between a pair of nodes (e.g., a looptopology), the longest path should be considered. Note that in a bus topology, the longest node-to-node distance is equal to the total cable length.a. The total length of all cable in a segment must not exceed the maximum total cable length.

3. One termination is required in each segment. It may be located anywhere along the segment.

Doubly Terminated NetworksYou can extend the maximum total cable length without using a repeater by using doubly-terminatednetwork topology. The trade-offs are (1) this network topology must be rigorously followed duringthe installation and subsequent retrofits and (2) two terminations must be installed at the ends of thebus for proper transmission performance. Refer to Echelon LONWORKS FTT-10A TransceiverUser’s Guide. See Reference Documents for part number.

Note: Limitations to wire lengths apply and must be observed.

Figure 4. Doubly Terminated Network Topology

Termination Termination

Doubly Terminated Topology RestrictionsThe restrictions on doubly-terminated bus topology are as follows:1. The maximum number of nodes per segment is 64.2. The maximum total bus length depends on the wire size:

Wire Size Maximum Cable Length24 AWG 2952 ft (900 m)22 AWG 4590 ft (1400 m)16 AWG 8855 ft (2700 m)

3. The maximum stub length is 9.8 ft (3 m).

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A stub is a piece of cable that is wired between the node and the bus. See Figure 2. Note that ifthe bus is wired directly to the node, there is no stub, and thus the stub length is zero. If you arewiring to a field terminal strip on a unit, be sure to account for any factory wiring between theterminal strip and the controller. This wiring is considered part of the stub.

4. Two terminations are required in each segment. One must be located at each end of the bus.

Network Cable TerminationLONWORKS network segments require termination for proper data transmission performance. Thetype and number of terminations depend on network topology. Refer to Echelon LONWORKS FTT-10A Transceiver User’s Guide. See Reference Documents for part number.

LONWORKS Network AddressingEvery Neuron® Chip has a unique 48-bit Neuron ID or physical address. This address is generallyused only at initial installation or for diagnostic purposes. For normal network operation, a deviceaddress is used.Device addresses are defined at the time of network configuration. All device addresses have threeparts. The first part is the Domain ID, designating the domain. Devices must be in the same domainin order to communicate with each other. The second part is the Subnet ID that specifies a collectionof up to 127 devices that are on a single channel or a set of channels connected by repeaters. Theremay be up to 255 subnets in a domain. The third part is the Node ID that identifies an individualdevice within the subnet.A group is a logical collection of devices within a domain. Groups are assembled with regard fortheir physical location in the domain. There may be up to 256 groups in a domain. A group address isthe address that identifies all devices of the group. There may be any number of devices in a groupwhen unacknowledged messaging is used. Groups are limited to 64 devices if acknowledgedmessaging is used.A broadcast address identifies all devices within a subnet or domain.

Commissioning the NetworkPressing the service pin, switch on the MicroTech II LONWORKS Communication Module, generatesa service pin message, which contains the Neuron ID and the program code identification of thenode. A service pin message is a network message that is generated by a node and broadcast on thenetwork. It can be used to commission the LONWORKS network.A network configuration tool maps device Neuron IDs to the domain/subnet/node logical addressingscheme when it creates the network image, the logical network addresses and connection informationfor all devices (nodes) on the network.

External Interface File (XIF)LONMARK guidelines specify exact documentation rules so that proprietary configuration tools arenot required to commission and configure LONWORKS devices. The MicroTech II LONWORKSChiller Communication Module is self-documenting so that any network management tool can obtainall the information needed over the network to connect it into the system and to configure andmanage it. An external interface file (a specially formatted PC text file with an extension .XIF) isavailable so that any network tool can design and configure it prior to installation. For a copy of theXIF file contact your local McQuay International representative.

Configuring the Unit ControllerThe MicroTech II Chiller Controller and MicroTech II LONWORKS Communication Module togetherare designed, programmed, and configured at the factory to be a chiller unit controller in accordancewith the LONMARK Chiller functional profile. The unit is ready to operate with the default values ofthe various parameters set at the factory. No additional programming is required to make this a chillerunit controller. However, you may want to change some parameters in order to make it fit into yoursystem better.Default values may be changed with the unit’s keypad or via the network. See the appropriateoperation manual for default values and keypad operating instructions. See Reference Documents forpart numbers.

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Data IntegrityThe integrity of some data depends on a valid network connection to maintain current values. Thefollowing data points require a valid network connection. If a data point listed in Table 1 does notchange after a given time, the controller reverts to the default values of the variables.

Table 1. Receive Heart Beat Variables

Data Point LONWORKS VariableActive Chiller Mode nvoChillerstatActive Setpoint nvoActiveSetptActual Capacity nvoActualCapacityLeaving Evaporator Water Temperature nvoLvgCHWTempLeaving Condenser Water Temperature nvoLvgCndWTempEntering Condenser Water Temperature nvoEntCndWTempEntering Evaporator Water Temperature nvoEntCHWTemp

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Typical Minimum Integration

When you have integrated the unit into your network, you can monitor and control unit operationfrom your workstation. At a minimum, you can:

! Display and monitor data points! Turn the unit on or off! Operate the unit safely

Note: The following integration details apply to MicroTech II Centrifugal Chillers (Models WSC,WDC, and WPV) only.

Set up the Unit for Network ControlTo setup the MicroTech II Unit Controller for network control1. Disable the chiller. The chiller should not be operating while performing this setup.2. At the unit controller keypad,

a. In the SET UNIT SPs (1) screen, set the setpoint “Source” equal to “Lon” . Use the OperatorPassword of “100”.

b. In the SET UNIT SPs (1) screen, set the “Enable” setting equal to “Off” .c. In the SET UNIT SPs (13) screen, set the protocol parameters . Use the Manager Password

of “2001”.3. Verify with the chiller technician that the chiller is operational.4. At the unit controller keypad,

a. In the SET UNIT SPs (1) screen, set the setpoint “Source” equal to “BAS”. Use theOperator Password of “100”.

Display Important Data PointsTypical workstation displays of MicroTech II Unit Controller attributes include the followingsignificant data points (page number of detailed description in parenthesis). Each data point isidentified with a number that also identifies it in the Comprehensive Data Point Tables. These datapoints are also shaded in the comprehensive tables so that you can distinguish them . References inthe text of this section also identify these data points with a number and shading.

Table 2. Significant Data Points

No Configuration No Temperatures No Setpoints No Alarms1 Chiller Status BACnet

(30)Chiller StatusLONWORKS (30)

5 Evaporator EnteringWater Temperature (42)

9 Cool Setpoint (40) 11 Current Alarm (56)

2 Chiller Mode Setpoint(28)

6 Evaporator LeavingWater Temperature (43)

10 Capacity Limit Setpoint(23)

12 Network Clear Alarm(66)

3 Actual Capacity (22) 7 Condenser EnteringWater Temperature (36)

4 Chiller Enable (24) 8 Condenser LeavingWater Temperature (37)

You can display any number of additional data points based on job requirements or individualpreference. See LONWORKS Variables on page 18 for lists of all LONWORKS Variables available tothe network. See BACnet Standard Objects on page 16 for list of all BACnet Objects available to thenetwork. For a more detailed description of all available data points, see the Detailed Data PointInformation section on page 20 of this document.

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Comprehensive Data Point Tables

BACnet Standard ObjectsChiller Variables

Network Control PropertyKeypad attributes available asBACnet Standard Objects for networkcontrol of the unit

Page

Rea

d or

Rea

d/W

rite

Obj

ect

Type

Obj

ect

Inst

ance

Description

Active Setpoint 20 R AI 7 -40°–199°FActual Capacity (3) 22 R AI 9 0–160%Capacity Limit (Output) (10) 23 R AI 8 0–160%Capacity Limit Setpoint (10) 22 W AO 32 0 to 160%; Default=100%Chiller Enable (Input) (4) 25 C BV 41 0=Request Chiller Off, 1=Request Chiller On;

Default=OffChiller Limited 49 R BI 39 0=Not Limited, 1=LimitedChiller Local/Remote 26 R BI 38 0=OFF, 1=ONChiller Mode 26 C MSO 45 1=HVAC_HEAT, 3=HVAC_COOL,

5=HVAC_PRE_COOL, 11=HVAC_ICE;Default=Cool

Chiller On Off 29 R BI 33 0=Chiller Off, 1=Chiller OnChiller Status BACnet (1) 30 R MSI 43 1 = Off, 2 = Start, 3 = Run, 4 = Pre Shutdown, 5 =

ServiceChiller Type 32 R MSO 48 1=AGZS2, 2=AGZD2, 3=WGXD2, 4=WCFU3

(centrifugal), 5=AGSU3Compressor Discharge Temperature 29 R AI 18 -460°–621°FCompressor Percent RLA 33 R AI 24 -3276.8–3276.7Compressor Run Hours 33 R AI 26 0 –65,535Compressor Select 34 C MSO 46 0 –65,535; Default=0 (Pump 1)Compressor Starts 35 R AI 25 0 –65,535Compressor Suction Line Temperature 35 R AI 15 -40°–244°FCondenser Entering Water Temperature(7)

36 R AI 3 -40°–244°F

Condenser Flow Switch Status 35 R BI 15 0=No Flow, 1=FlowCondenser Leaving Water Temperature(8)

37 R AI 4 -40°–244°F

Condenser Pump Run Hours 37 R AI 28 0 –65,535Condenser Refrigerant Pressure 37 R AI 16 -3276.8–3276.7Condenser Saturated RefrigerantTemperature

39 R AI 17 -40°–244°F

Condenser Water Pump Status 37 R BI 37 0=No Flow, 1=FlowCool Setpoint (9) 40 C AO 29 10 – 120°F; Default=44°FEvaporator Entering Water Temperature(5)

42 R AI 1 -40°–244°F

Evaporator Flow Switch Status 43 R BI 34 0=No Flow, 1=FlowEvaporator Leaving Water Temperaturefor Unit(6)

43 R AI 2 -40°–244°F

Evaporator Leaving Water Temperaturefor Compressor

44 R AI 23 -40°–244°F

Evaporator Pump Run Hours 43 R AI 27 0 –65,535Evaporator Refrigerant Pressure 45 R AI 13 -3276.8–3276.7Evaporator Saturated RefrigerantTemperature

45 R AI 14 -40°–244°F

Evaporator Water Pump Status 45 R BI 36 0=No Flow, 1=FlowHeat Recovery Entering WaterTemperature

48 R AI 5 -40°–244°F

Heat Recovery Leaving WaterTemperature

47 R AI 6 -40°–244°F

Heat Setpoint 46 C AO 31 50–120°F; Default=95°FIce Setpoint 49 C AO 30 15 – 35°F, Default=25°F

ED 15062-0 17


Page

Rea

d or

Rea

d/W

rite

Obj

ect

Type

Obj

ect

Inst

ance

Description

Liquid Line Refrigerant Pressure 50 R AI 12 -22592–22591 psiLiquid Line Refrigerant Temperature 50 R AI 11 -40°–244°FOil Feed Pressure 51 R AI 19 -22592–22591 psiOil Feed Temperature 52 R AI 21 --40°–244°FOil Sump Pressure 52 R AI 20 -22592–22591 psiOil Sump Temperature 53 R AI 22 -40°–244°FOutdoor Air Temperature 53 R AI 10 -40°–244°FPump Select 53 C MSO 47 0=Pump No. 1, 1=Pump No.; Default=0Run Enabled 55 R BI 33 0=OFF, 1=Run Allowed

Chiller Alarm Objects


Page

Rea

d or

Rea

d/W

rite

Obj

ect

Type

Obj

ect

Inst

ance

Description

Warning Alarms, Analog Input Object(11)

57 R AI 902 Alarm Index

Problem Alarms, Analog Input Object(11)

57 R AI 900 Alarm Index

Fault Alarms, Analog Input Object (11) 58 R AI 901 Alarm IndexWarning Alarms, Multi-state Input Object(11)

58 R MSI 902 Alarm Index and Alarm Text (30 characters max)

Problem Alarms, Multi-state Input Object(11)


Fault Alarms, Multi-state Input Object(11)


Alarm Digital Output (11) 59 R BI 40 0-No Alarm, 1=AlarmBACnet Clear Alarm (12) 66 C BV 42 0= Normal,1=Clear Alarm

18 ED 15062-0

LONWORKS VariablesNetwork Output Variables

Network Control PropertyKeypad attributes available asLONWORKS Variables for networkcontrol of the unit

Variable Name

Page

SNVT

Inde

x Description

Active Setpoint nvoActiveSetpt 20 105 -40°–93° CActual Capacity (3) nvoActCapacity 22 81 0–160%Capacity Limit (Output) nvoCapacityLim 23 81 0–160%Chiller Limited nvoChillerStat 49 127 LIMITEDChiller Local/Remote nvoChillerStat 26 127 LOCALChiller On Off nvoOnOff 29 06 0=Chiller Off, 1=Chiller OnChiller Status (1) nvoChillerstat 30 127 Chiller Run Mode: 0=CHLR_OFF, 1=

CHLR_START. 2=CHLR_RUN,3=CHLR_PRESHUTDN, 4=CHLR_SERVICE,Chiller Operating Mode:1=HVAC_HEAT, 3=HVAC_COOL,11=HVAC_ICE Chiller State: In_Alarm,Run_Enabled, Local, Limited, CHW_flow,CONDW_flow

Compressor Discharge Temperature nvoCompDisTemp 29 105 -273.17°-327.66°CCompressor Percent RLA nvoCompMtrAmps 33 1 -3276.8–3276.7Compressor Run Hours nvoCompHrs 33 8 0 –65,535Compressor Starts nvoCompStarts 35 8 0 –65,535Compressor Suction Line Temperature nvoSuctionTemp 35 105 -40°–118°CCondenser Entering WaterTemperature (7)

nvoEntCndWTemp 36 105 -40°–118° C

Condenser Flow Switch Status nvoCndWFlow 35 95 0=No Flow, 1=FlowCondenser Leaving WaterTemperature (8)

nvoLvgCndWTemp 37 105 -40°–118° C

Condenser Pump Run Hours nvoCondPumpHrs 37 8 0 –65,535Condenser Refrigerant Pressure nvoCondRefPress 37 30 -3276.8–3276.7Condenser Saturated RefrigerantTemperature

nvoSatCndRefTemp 39 105 -40°–118°C

Condenser Water Pump Status nvoCndWPump 37 95 0=No Flow, 1=FlowCurrent Alarm (11) nvoAlarmDescr 56 36 Alarm Text (30 characters max)Evaporator Entering WaterTemperature (5)

nvoEntCHWTemp 42 105 -40°–118° C

Evaporator Flow Switch Status nvoChWFlow 43 95 0=No Flow, 1=FlowEvaporator Leaving WaterTemperature for Unit (6)

nvoLvgCHWTemp 43 105 -40°–118° C

Evaporator Pump Run Hours nvoEvapPumpHrs 43 8 0 –65,535Evaporator Refrigerant Pressure nvoEvapRefPress 45 30 -3276.8–3276.7Evaporator Saturated RefrigerantTemperature

nvoSatEvpRefTemp 45 105 -40°–118°C

Evaporator Water Pump Status nvoChWPump 45 95 0=No Flow, 1=FlowHeat Recovery Entering WaterTemperature

nvoEntHRWTemp 48 105 -40°–118°C

Heat Recovery Leaving WaterTemperature

nvoLvgHRWTemp 47 105 -40°–118° C

Liquid Line Refrigerant Pressure nvoLiquLinePress 50 30 :-3,276.8 .. 3,276.7 kPA (0.1 kPa)Liquid Line Refrigerant Temperature nvoLiquLineTemp 50 105 -40°–118°COil Feed Pressure nvoOilFeedPress 51 30 -3276.8–3276.7 kPaOil Feed Temperature nvoOilFeedTemp 52 105 -40°–118°COil Sump Pressure nvoOilSumpPress 52 30 -3276.8–3276.7 kPaOil Sump Temperature nvoOilSumpTemp 53 105 -40°–118° COutdoor Air Temperature nvoOutdoorTemp 53 105 -40°–118°CRun Enabled nvoChillerStat 55 127 RUN_ENABLED

ED 15062-0 19

Network Input VariablesNetwork Control PropertyKeypad attributes available asLONWORKS Variables for networkcontrol of the unit

Variable Name

Page

SNVT

Inde

x Description

Capacity Limit Setpoint (10) nviCapacityLim 22 81 0 to 160%; Default=100%Chiller Enable (Input) (4) nviChillerEnable 25 95 0=Request Chiller Off, 1=Request Chiller On;

Default=OffChiller Mode nviMode 26 108 1=HVAC_HEAT, 3=HVAC_COOL,

5=HVAC_PRE_COOL, 11=HVAC_ICE;Default=Cool

Compressor Select nviCompSelect 34 8 0 –65,535; Default=0 (Pump 1)Cool Setpoint (9) nviCoolSetpt 40 105 -12.2– 48.8°C; Default=7.2°CHeat Setpoint nviHeatSetpt 46 105 10–93°C; Default=35°CIce Setpoint nviIceSpt 49 105 -9.4– 1.7°C; Default=-3.9°CNetwork Clear Alarm (12) nviClearAlarm 66 95 0= ,1=Clear Alarm; Default=0Pump Select nviPumpSelect 53 95 0=Pump No. 1, 1=Pump No.; Default=0

Network Configuration ParametersNetwork Control PropertyKeypad attributes availableas LONWORKS Variables fornetwork control of the unit

Variable Name

Page

SCPT_Reference

SCPT

Inde

x Description

Def

ault

Valu

e

Capacity Limit (LONWORKSConfiguration)

nciCapacityLim 22 SCPT_limitChlrCap 81 0% to 160%. 100%

Chiller Enable (LONWORKSConfiguration)

nciChillerEnable 24 SCPT_pwrUpState 73 0=Request Chiller Off,1=Request Chiller Auto (run)

0

Cool Setpoint (LONWORKSConfiguration)

nciCoolSetpt 40 SCPT_CoolSetpoint 75 –40°C to 93°C 7.2° C

Default Values nciDefaults 41 SCPT_maxSendTime 71 0=Use Default Values,1=Use Manufacturer-Specified Values

0

Heat Setpoint (LONWORKSConfiguration)

nciHeatSetpt 46 SCPT_HeatSetpoint 78 -40–93°C 37.8° C

Chiller Location nciLocation 27 SCPT_location 17 Any NUL terminated ASCIIstring up to 31 bytes.

00000

Maximum Send Time nciMaxSendTime 51 SCPT_maxSendTime 52 0–6553.4 sec 0 secMinimum Send Time nciMinSendTime 51 SCPT_minSendTime 52 0–6553.4 sec 0 secChiller Mode (LONWORKSConfiguration) (2)

nciMode 27 SCPT_HVACmode 74 1=HVAC_HEAT,3=HVAC_COOL11=HVAC_ICE

3

Receive Heartbeat nciRcvHrtBt 55 SCPT_maxRcvTime 49 0.0 – 6553.4 sec (0.1 sec). 0

20 ED 15062-0

Detailed Data Point Information

This section lists the information (the data) that is available to the Building Automation System(BAS) via the different communication protocols (BACnet and LONWORKS etc.). This information isused to safely operate and log the performance of the chiller. The systems integrator also uses thisinformation when creating custom graphics.

Data PointsData Points are referred to as properties in the BACnet protocol and referred to as networkvariables or configuration parameter in the LonTalk protocol. In this document, the textrefers to this information as a “data point.” In the general case, the data point is applicable toall protocols. When a data point is specific to the BACnet protocol the text refers to aproperty; when a data point is specific to the LonTalk protocol the text refers to a networkvariable or configuration parameter.

Table 3. Data Points for Chiller Models

Data Point WSC/WDC/WPV

AGZ ACZ AGS

Active Setpoint X X XActual Capacity X XCapacity Limit (LONWORKS Configuration) X XCapacity Limit Output X XCapacity Limit Setpoint X XChiller Enable X X X XChiller Enable (LONWORKS Configuration) X X X XChiller Limited X XChiller Local/Remote X X X XChiller Location X X X XChiller Mode (LONWORKS Configuration) X X XChiller Mode Output X X XChiller Mode Setpoint X X XChiller On Off X X X XChiller Status BACnet X X X XChiller Status LONWORKS X X X XChiller Type X X XCompressor Discharge Temperature X XCompressor Percent RLA XCompressor Run Hours X X X XCompressor Select X X X XCompressor Starts X X X XCompressor Suction Line Temperature X XCondenser Entering Water Temperature XCondenser Flow Switch Status XCondenser Leaving Water Temperature XCondenser Pump Run Hours XCondenser Refrigerant Pressure X X X XCondenser Saturated Refrigerant Temperature X X X XCondenser Water Pump Status XCool Setpoint X X XCool Setpoint (LONWORKS Configuration) X X XCurrent Alarm X X X XDefault Values X X X XDevice Object X X X XEvaporator Entering Water Temperature X XEvaporator Flow Switch Status X X X XEvaporator Leaving Water Temperature for Unit X X XEvaporator Leaving Water Temperature for Compressor X X X

ED 15062-0 21

Data Point WSC/WDC/WPV

AGZ ACZ AGS

Evaporator Pump Run Hours XEvaporator Refrigerant Pressure X X X XEvaporator Saturated Refrigerant Temperature X X X XEvaporator Water Pump Status X X XFault Alarms, Analog Input Object X X X XFault Alarms, Multi-state Input Object X X X XHeat Recovery Entering Water Temperature XHeat Recovery Leaving Water Temperature XHeat Setpoint XHeat Setpoint (LONWORKS Configuration) XIce Setpoint X X XLiquid Line Refrigerant Pressure XLiquid Line Refrigerant Temperature X XMaximum Send Time X X X XMinimum Send Time X X X XNetwork Clear Alarm X X XOil Feed Pressure XOil Feed Temperature XOil Sump Pressure XOil Sump Temperature XOutdoor Air Temperature X X XProblem Alarms, Analog Input Object X X X XProblem Alarms, Multi-state Input Object X X X XPump Select XReceive Heartbeat X X X XRun Enabled X X X XWarning Alarms, Analog Input Object X X X XWarning Alarms, Multi-state Input Object X X X X

Active SetpointThis read or read/write output network variable indicates the current value of the setpoint temperatureused to control the temperature of the Leaving Chilled Water or Leaving Hot Water. Based on theoperating mode of the chiller, this value is derived from the Cool Setpoint, Heat Setpoint, or IceSetpoint. The default mode is Cooling and is used unless changed by the Mode input. (A2)

Measurement Units Data Type Valid Range Default ValueTemperature BACnet: °F

LONWORKS:°C

BACnet: Signed IntegerLONWORKS; Fixed Point Scalarsigned long

BACnet: -40°–199°FLONWORKS: -40°–93° C

NA

BACnet



Full ReferenceMTII Chiller UC ####.ActiveLvgWaterTarget.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoActiveSetpt Chiller temp_p 105 two bytes

Keypad Menu Path:Menu

\Set\Unit SPs (3)

22 ED 15062-0

Actual CapacityThis read or read/write output network variable indicates the percent of capacity the chiller iscurrently producing. It may be more or less than the nominal capacity of the chiller. (A10)

Measurement Units Data Type Valid Range Default ValuePercent of chiller capacity NA BACnet: Signed Integer

LONWORKS: Fixed-Point Scalar signedlong

0–160% NA

BACnet



Full ReferenceMTII Chiller UC ####.ChillerCapacity.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoActCapacity Chiller lev_percent 81 two bytes

Capacity Limit (LONWORKS Configuration)

Capacity Limit is a measure of the ratio of operating capacity to full capacity expressed in percent.This LonTalk variable sets a default value for the capacity limit of the chiller, unless theconfiguration property, nciDefaults = 1 (See Default Values on page 41). If nciDefaults = 1, thedefault values are the values specified during manufacturing. The capacity limit value is not thenominal capacity limit of the Chiller. Refer to the appropriate Operating Manual for suitable variablevalues.

Measurement Units Data Type Valid Range Default ValuePercent of maximum capacity NA LONWORKS: Fixed-Point Scalar signed

long0% to 160%. See Below

Default Value100%The chiller object uses the configuration value of nciCapacityLim on power-up or loss ofcommunication unless the configuration parameter nciDefaults =1 (See Default Values on page 41)(factory-specific defaults).

Variable DetailsLONWORKS Name Profile SNVT Type SNVT

IndexSNVT Size SCPT_Reference SCPT

IndexnciCapacityLim (configuration) Chiller lev_percent 81 two bytes SCPTlimitChlrCap 81

Keypad Menu Path:No KeypadEquivalent

Keypad Menu Path:No Keypad Equivalent

ED 15062-0 23

Capacity Limit OutputThis read or read/write output variable is a measure of the ratio of operating capacity to full capacityexpressed in percent. This outpur variable indicates the current value of the Capacity Limit. (A42)

Measurement Units Data Type Valid Range Default ValuePercent of maximum capacity NA BACnet: Signed Integer


0% to 160%. See Below

BACnetVariable Details

Object Identifier Property IdentifierObject Type Type Enumeration Instance Property Name Property Enumeration

Analog Input 0 8 Present Value 85Full Reference

MTII Chiller UC ####.ActiveCapacityLimit.Present_Value

LonTalkVariable DetailsLONWORKS Name Profile SNVT Type SNVT


IndexnvoCapacityLim (output) Chiller lev_percent 81 two bytes NA NA

Capacity Limit SetpointCapacity Limit is a measure of the ratio of operating capacity to full capacity expressed in percent.This level may be adjusted via an operator workstation or other network device, but cannot beadjusted above a factory-specified limit. The input network variable sets the operating value (input).Refer to the appropriate Operating Manual for suitable variable values. (A3)

Measurement Units Data Type Valid Range Default ValuePercent of maximum capacity NA BACnet: Signed Integer


0% to 160%. See Below

BACnetThis read or read/write property sets the maximum capacity limit of the chiller. This level may beadjusted, but cannot be adjusted above a factory-specified limit.


Object Type Type Enumeration Instance Property Name Property EnumerationAnalog Output 1 32 Present Value 85

Full ReferenceMTII Chiller UC ####.NetworkCapacityLimitPct.Present_Value

Default Value (Relinquish_Default)100%



24 ED 15062-0

LonTalk

Input (nvi)The input network variable sets the maximum capacity level of the chiller. This level may be adjustedvia an operator workstation or other network device, but cannot be adjusted above a factory-specifiedlimit.



IndexnviCapacityLim (input) Chiller lev_percent 81 two bytes NA NA

Chiller EnableThe Chiller Enable data point starts the chiller in a particular way. LonTalk network variables can setthe default power-up and restart mode and start the chiller. The BACnet property is a commandableproperty. Refer to the appropriate Operating Manual for suitable variable values. (D1)

Measurement Units Data Type Valid Range Default ValueChiller State NA BACnet: Signed Integer

LONWORKS: structureEnumerated See Below

BACnetThis read or read/write property enables (starts) the chiller to run if the operating conditions aresatisfied, or disables (stops) the chiller from running. When this property is read, it indicates thecurrent operating state of the chiller.


Object Type Type Enumeration Instance Property Name Property EnumerationBinary Value 5 41 Present Value 85

Full ReferenceMTII Chiller UC ####.ChillerEnable.Present Value.Present_Value

Property Values0 = Off (disable)1 = On (enable)

Default Value (Relinquish_Default)0 = Request Chiller Off


\Set\Unit SP (1)

ED 15062-0 25

LONWORKS

Input (nvi)This input network variable enables (starts) the chiller to run if the operating conditions are satisfied,or disables (stops) the chiller from running.


IndexSNVT Size SCPT_Reference SCPT_

IndexnviChillerEnable Chiller Switch 95 two bytes NA NA

Structuretypedef struct {

unsigned value;signed state;

} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Request Chiller Off

1 Request Chiller Auto (run)0xff Invalid

Chiller Enable (LONWORKS Configuration)This LonTalk configuration variable sets the default power-up and restart mode of the chiller, unlessthe configuration parameter nciDefaults = 1 (See Default Values on page 41). If nciDefaults = 1, thedefault values are the values specified during manufacturing. Refer to the appropriate OperatingManual for suitable variable values.Measurement Units Data Type Valid Range Default ValueChiller State NA LONWORKS: structure Enumerated See Below


IndexSNVT Size SCPT_Reference SCPT_

IndexnciChillerEnable Chiller switch 95 two bytes SCPTpwrUpState 73

Default Value)0 = Request Chiller OffThe chiller object uses the configuration value of nciChillerEnable on power-up or loss ofcommunication unless the configuration parameter nciDefaults =1 (See Default Values on page 41)



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Request Chiller Off

1 Request Chiller Auto (run)0xff Invalid


\Set\Unit SP (1)


26 ED 15062-0

Chiller LimitedThis output network variable indicates the main running mode and states of the Chiller. The Limitednetwork variable indicates whether conditions exist that prevent the chiller from reaching setpoint.(D6)

Measurement Units Data Type Valid Range Default ValueStatus NA Structure Enumerated NA

BACnet


Object Type Type Enumeration Instance Property Name Property EnumerationBinary Input 3 39 Present Value 85

Full ReferenceMTII Chiller UC ####.ChillerLimited.Present_Value

Property Values0 = Not Limited1 = Limited

LONWORKS

The LONWORKS equivalent of this data point is part of the Chiller Status LONWORKS (page 30)outputnetwork variable.

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoChillerStat Chiller chlr_status 127 3 bytes

Chiller Local/RemoteThe Local/Remote network variable indicates whether the chiller is in local control or allowed to becontrolled remotely over the network. (D5)

Measurement Units Data Type Valid Range Default ValueMode NA Structure Enumerated NA

BACnet



Full ReferenceMTII Chiller UC ####.ChillerLocalRemote.Present_Value

Property Values0 = OFF1 = ON



ED 15062-0 27

LONWORKS

The LONWORKS equivalent of this data point is part of the Chiller Status LONWORKS (page 30)outputnetwork variable.

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT Size Data TypenvoChillerStat Chiller chlr_status 127 3 bytes Structure

Chiller LocationThis configuration network parameter provides a description of the location.

Measurement Units Data Type Valid Range Default ValueNA NA Structure Any NUL terminated ASCII string up to 31

bytes.ASCII string of zeros + NUL

LONWORKS



IndexnciLocation Chiller str_asc 36 31 bytes max SCPT_location 17


unsigned char ascii[31];} SNVT_str_asc;

Chiller Mode (LONWORKS Configuration)This LONWORKS configuration network parameter establishes the default operating mode of thechiller, unless the configuration parameter nciDefaults = 1 (See Default Values on page 41). IfnciDefaults = 1, the default values are the values specified during manufacturing.

! Heat Mode! Cool Mode (default)! Ice Mode

Measurement Units Data Type Valid Range Default ValueHVAC Mode NA Unsigned Integer Enumerated See Below

Default Value3 = HVAC_COOLThe chiller object uses the configuration value of nciMode on power-up or loss of communicationunless the configuration parameter nciDefaults =1 (See Default Values on page 41).


IndexSNVT Size SCPT Reference SCPT

IndexnciMode Chiller hvac_mode 108 one byte SCPT_HVACmode 74



28 ED 15062-0

Chiller Mode OutputThis output data point indicates the current operating mode of the chiller. (I19)


BACnet


Object Type Type Enumeration Instance Property Name Property EnumerationMulti-state Input 13 44 Present Value 85

Full ReferenceMTII Chiller UC ####.ActiveMode.Present_Value

Property Values1. ICE2. COOL3. HEAT

LONWORKSThe LONWORKS equivalent of this data point is part of the Chiller Status LONWORKS(page 30)outputnetwork variable.


Chiller Mode SetpointThe Chiller Mode data point determines the mode of operation of the chiller. LonTalk networkvariables set the default and operating chiller mode. The BACnet property is a commandableproperty of a Multi-state Output object. Refer to the appropriate Operating Manual for suitablevariable values. (I17)


BACnetThis commandable property sets the mode of operation of the chiller and provides the ability foranother node on the network to place a chiller in another mode.


Object Type Type Enumeration Instance Property Name Property EnumerationMulti-state Output 14 45 Present Value 85

Full ReferenceMTII Chiller UC ####.ChillerOperationMode.Present_Value

Property Values1. ICE2. COOL3. HEAT

Default Value (Relinquish_Default)2



\Set\Unit SP (1)

ED 15062-0 29

LONWORKS

Input (nvi)This input network variable sets the mode of operation of the chiller and provides the ability foranother node on the network to place a chiller in another mode.


IndexSNVT Size SCPT Reference SCPT

IndexnviMode Chiller hvac_mode 108 one byte NA NA

hvac_modeAll enumerations are not used for this data point. Only the following enumerations are used.Value Identifier Notes1 HVAC_HEAT Heating only

3 HVAC_COOL Cooling only11 HVAC_ICE Ice-making mode

Chiller On OffThis output network variable indicates the current state of the chiller. The OFF state is represented bystate = FALSE and value = 0. The other discrete states are represented by state = TRUE andvalue > 0. (D2)

Measurement Units Data Type Valid Range Default ValueChiller State NA BACnet: Signed Integer

LONWORKS: structureEnumerated NA

BACnet



Full ReferenceMTII Chiller UC ####.UnitOFF.Present_Value

Property Values0 = OFF1 = Run Allowed

LONWORKSThe LONWORKS equivalent of this data point is part of the Chiller Status LONWORKS (page 30)outputnetwork variable.

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOnOff Chiller switch 06 two bytes

Keypad Menu Path:Menu\View\Unit

\Status

30 ED 15062-0

Chiller Status BACnetThis output network variable indicates the main running mode and states of the Chiller. The modeprovides the primary running states of a chiller and the state provides an indicator of other conditionspresent. (I18)

Measurement Units Data Type Valid Range Default ValueState NA Integer Enumerated NA

BACnet


Object Type Type Enumeration Instance Property Name Property EnumerationMulti-state Input 13 43 Present Value 85

Full ReferenceMTII Chiller UC ####.UnitStatus.Present_Value

Property Values1 = Off2 = Start3 = Run4 = Pre Shutdown5 = Service

Chiller Status LONWORKSThe LONMARK chiller profile uses two types of information to provide status. The first type is verygeneral. This general name is nvoOnOff (see Chiller On Off on page 29) and it indicates whether thechiller is off or on to the network. The second type is Chiller Status. Part of it includes the run mode.The run mode is typically what we would think of as chiller status and is defined as Off, Start, Run,Pre-shutdown and Service.This output network variable indicates the main running mode and states of the Chiller. The modeprovides the primary running states of a chiller and the state provides an indicator of other conditionspresent.

Measurement Units Data Type Valid Range Default ValueChiller Status NA Structure See Below NA

Menu Path:Menu\View\Unit

\Status

Menu Path:Menu\View\Unit

\Status

ED 15062-0 31

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoChillerstat Chiller chlr_status 127 3 bytes


chiller_t chlr_run_mode;hvac_t chlr_op_mode;struct{

unsigned in_alarm :1;unsigned run_enabled :1;unsigned local :1;unsigned limited :1;unsigned chw_flow :1;unsigned condw_flow :1;

} chlr_state;} SNVT_chlr_status;

Chiller Run Mode (chiller_t [25])All enumerations are not used for this data point. Only the following enumerations are used.Value Identifier Notes0 CHLR_OFF Chiller off1 CHLR_START Chiller in start mode2 CHLR_RUN Chiller in run mode3 CHLR_PRESHUTDN Chiller in pre shutdown

mode4 CHLR_SERVICE Chiller in service mode

Chiller Operating Mode (hvac_t [14])All enumerations are not used for this data point. Only the following enumerations are used.Value Identifier Notes1 HVAC_HEAT Heating only3 HVAC_COOL Cooling only

11 HVAC_ICE Ice-making mode

Chiller StateIn_Alarm 1= Chiller is in an alarm condition. This condition may also be observed in the Node Object’s status.

0= No alarm conditionRun_Enabled 1= Chiller starts if operating conditions are satisfied,

0= Chiller not permitted to run. Chiller may be in local mode or placed in an disabled condition andcan’t be run via a remote request.

Local 1= Chiller has been placed in a locally controlled mode of operation and cannot respond to remoterequests.

0= Chiller is not in local mode and network visible values maybe changed or monitored remotely.Limited 1= Chiller conditions may exist that prevents the Chiller from reaching setpoint.

0= Chiller is not restricted from attempting to reach setpoint.CHW_flow 1= Chiller Water flow is detected.

0= No chilled water flow present.CONDW_flow 1= Condenser Water flow has been detected

0= No condenser water flow is observed.

32 ED 15062-0

Chiller TypeThis output network variable indicates the type of chiller connected to this unit controller. (I28)

Measurement Units Data Type Valid Range Default ValueEvent Count NA BACnet: Unsigned Integer

LONWORKS: Fixed Point Scalar - unsignedlong

0 –65,535 NA

BACnet



Full ReferenceMTII Chiller UC ####.McQuayChillerType.Present_Value

Property Values1. AGZS22. AGZD23. WGXD24. WCFU3 (centrifugal)5. AGSU3

Compressor Discharge TemperatureThis output network variable indicates the current compressor refrigerant temperature of thecompressor selected with Compressor Select on page 34. (A19)


LONWORKS:°C

BACnet: Signed IntegerLONWORKS: Fixed PointScalar signed long

BACnet: -460°–621°FLONWORKS: -273.17°-327.66°C

NA

BACnet



Full ReferenceMTII Chiller UC ####.DischargeTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCompDisTemp Proprietary temp_p 105 two bytes


Keypad Menu Path:Menu\View

\Comp (5)

ED 15062-0 33

Compressor Percent RLAThis output network variable indicates the current motor current for the compressor motor of thecompressor selected with Compressor Select on page 34. (A25)

Measurement Units Data Type Valid Range Default ValuePercent RLA Percent BACnet: Real


-3276.8–3276.7 NA

BACnet



Full ReferenceMTII Chiller UC ####.CompMotorCurrentPercent.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCompPercRLA Proprietary lev_percent 81 two bytes

Compressor Run HoursThis output network variable indicates the number of hours that the compressor motor of thecompressor selected with Compressor Select on page 19 has been turned on. (I46)

Note: Value returned must be multiplied by 10 to give run hours.

Measurement Units Data Type Valid Range Default ValueEvent Count Hours BACnet: Unsigned Integer

LONWORKS: Float Type unsignedlong

0 –65,535 NA

BACnet



Full ReferenceMTII Chiller UC ####.CompHours.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCompHrs Proprietary count 8 two bytes


Keypad Menu Path:Menu\view

\Compressor

34 ED 15062-0

Compressor SelectThis input network variable selects the compressor (number 1, 2, 3 or 4) that is interrogated. Thecontroller returns the information for the selected compressor. You must first select a compressorthen interrogate the selected compressor. This variable selects a compressor for the followingvariables. (I32)Name PageCompressor Discharge Temperature 32Compressor Percent RLA 33Compressor Run Hours 33Compressor Starts 35Compressor Suction Line Temperature 35Condenser Refrigerant Pressure 38Condenser Saturated Refrigerant Temperature 39Evaporator Leaving Water Temperature for Compressor 44Evaporator Refrigerant Pressure 45Evaporator Saturated Refrigerant Temperature 45Oil Feed Pressure 51Oil Feed Temperature 52Oil Sump Pressure 52Oil Sump Temperature 53



0 –65,535 0 – Pump No. 1

BACnet



Full ReferenceMTII Chiller UC ####.CompSelect.Present_Value

Property Values1. Pump No. 12. Pump No. 23. Pump No. 34. Pump No. 4

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenviCompSelect Proprietary count 8 two bytes

Valid Range1 Pump No. 12 Pump No. 23 Pump No. 34 Pump No. 4


ED 15062-0 35

Compressor StartsThis output network variable indicates the number of times the compressor motor of the compressorselected with Compressor Select on page 34 has been started. (I45)



0 –65,535 NA

BACnet



Full ReferenceMTII Chiller UC ####.CompStarts.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCompStarts Proprietary count 8 two bytes

Compressor Suction Line TemperatureThis output network variable indicates the current suction line refrigerant temperature. There is aseparate output for each compressor. See Compressor Select on page 34. (A15)


LONWORKS:°C

BACnet: Signed IntegerLONWORKS: Fixed Point Scalarsigned long

BACnet: -40°–244°FLONWORKS: -40°–118°C

NA

BACnet



Full ReferenceMTII Chiller UC ####.SuctionTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoSuctionTemp Proprietary temp_p 105 two bytes

Keypad Menu Path:Menu\view

\Compressor


\Refrigerant (2)

36 ED 15062-0

Condenser Entering Water TemperatureThis output network variable indicates the current temperature of the entering condenser water. (A7)


LONWORKS:°C



NA

BACnet



Full ReferenceMTII Chiller UC ####.EntCondWaterTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoEntCndWTemp Chiller temp_p 105 two bytes

Condenser Flow Switch StatusThis output network variable indicates the status of the water flow through the condenser. (D8)

Measurement Units Data Type Valid Range Default ValueFlow State NA BACnet: Enumerated

LONWORKS: StructureSee Below NA

BACnet



Full ReferenceMTII Chiller UC ####.CondWaterFlowStatus.Present_Value

Property Values0 = No Flow1 = Flow

Keypad Menu Path:Menu\view\Unit

\Water


ED 15062-0 37

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCndWFlow Proprietary switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 No Flow

1 Flow

Condenser Leaving Water TemperatureThis output network variable indicates the current temperature of the leaving condenser water. (A8)


LONWORKS:°C

BACnet: RealLONWORKS: Fixed Point Scalarsigned long


NA

BACnet



Full ReferenceMTII Chiller UC ####.LvgCondWaterTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoLvgCndWTemp Chiller temp_p 105 two bytes

Condenser Pump Run HoursThis output network variable indicates the number of hours that the selected condenser pump motorhas been turned on. See Pump Select on page 53. (I48)



0 –65,535 NA


\Unit Water


38 ED 15062-0

BACnet



Full ReferenceMTII Chiller UC ####.CondPumpOperHours.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCondPumpHrs Proprietary count 8 two bytes

Condenser Refrigerant PressureThis output network variable indicates the current refrigerant pressure in the selected condenser.There is a separate output for each compressor. See Compressor Select on page 34. (A21)

Measurement Units Data Type Valid Range Default ValuePressure (gauge) BACnet: psi

LONWORKS:kPa

BACnet: Signed IntegerLONWORKS: Fixed-Point Scalar signedlong

BACnet: -22592–22591 psiLONWORKS:-3,276.8 .. 3,276.7 kPA

NA

BACnet



Full ReferenceMTII Chiller UC ####.CondPressure.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCondRefPress Proprietary press 30 two bytes


\Refrigerant (1)

ED 15062-0 39

Condenser Saturated Refrigerant TemperatureThis output network variable indicates the current saturated refrigerant temperature in the condenser.There is a separate output for each compressor. See Compressor Select on page 34. (A20)


LONWORKS: °CSigned Integer BACnet: -40°–244°F

LONWORKS: -40°–118°CNA

BACnet



Full ReferenceMTII Chiller UC ####.CondSatTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT Size Data TypenvoSatCndRefTemp Proprietary temp_p 105 two bytes Fixed Point Scalar

signed long

Condenser Water Pump StatusThis output network variable indicates whether the selected pump has been commanded On or Off.See Pump Select on page 54. (D31)

Measurement Units Data Type Valid Range Default ValueFlow State NA BACnet: Signed Integer

LONWORKS: StructureEnumerated NA

BACnet



Full ReferenceMTII Chiller UC ####.CondPumpState.Present_Value


Keypad Menu Path:Menu\Unit

\Refrigerant (1)


40 ED 15062-0

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoCndWPump Proprietary switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Pump Commanded Off

1 Pump Commanded On

Cool SetpointThe Cool Setpoint data point determines the temperature of the Leaving Chilled Water . LonTalknetwork variables set operating Temperature. The BACnet property is a commandable property of aAnalog Output object. Refer to the appropriate Operating Manual for suitable variable values. (A47)


LONWORKS:°C


BACnet: 35 – 80°FLONWORKS: 1.7– 26.7°C

See .Below

BACnetThis commandable property sets the temperature of the Leaving Chilled Water. This level may beadjusted via an operator workstation or other network device.



Full ReferenceMTII Chiller UC ####.NetworkCoolTempSetpoint.Present_Value

Default Value (Relinquish_Default)44°F

LONWORKSThis input network variable provides the Cooling setpoint of the Leaving Chilled Water when thechiller is operating in the Cooling Mode. The Cooling mode is the normal mode of chiller operation,unless overridden by using the optional Mode variable to change to another mode.



IndexnviCoolSetpt Chiller temp_p 105 two bytes NA NA


\Set\Unit SPs (3)

ED 15062-0 41

Cool Setpoint (LONWORKS Configuration)This configuration network parameter establishes the default Setpoint for the Leaving Chilled WaterTemperature unless nciDefaults=1 (see Default Values on page 41). When nciDefaults=1, use thevalues specified during manufacturing. Refer to the appropriate Operating Manual for suitablevariable values.

Measurement Units Data Type Valid Range Default ValueTemperature LONWORKS:

°CLONWORKS: Fixed Point Scalarsigned long

LONWORKS:-12.2–48.8°C

See .Below

Default Value7.2°CThe chiller object uses the configuration value of nciCoolsetpt on power-up or loss of communicationunless the configuration parameter nciDefaults =1 (See Default Values on page 41).unless overridden by using the optional Mode variable to change to another mode.



IndexnciCoolSetpt Chiller temp_p 105 two bytes SCPT_CoolSetpoint 75

Default ValuesThis configuration network parameter determines which set of values is used on power up andcommunication failure. The choice is the stated default values or a list of manufacturer specifiedvalues. This is used for the following configuration network variables: (D10)

! Chiller Enable! Capacity Limit! Cool Setpoint! Heat Setpoint! Mode

Measurement Units Data Type Valid Range Default ValueChiller State NA LONWORKS: structure Enumerated 0 = Use Default Values

LONWORKS



IndexnciDefaults Chiller switch 95 two bytes SCPT_DefaultBehavior 71



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Use Default Values

1 Use Manufacturer-Specified Values



42 ED 15062-0

Device ObjectEach BACnet compatible device must have one and only one BACnet Device Object. The deviceobject contains all required properties and the Max_Master and Max_Info_Frames optionalproperties. All properties of the device object may be read, but cannot be changed over the network.The initial instance of the MicroTech II Chiller device object is 3000. All critical properties of thedevice object can be changed in the HTTP Interface. The device object name is first part of fullreference of all objects in the BACnet Communication Module.

Caution: If another device in the network has the same object identifier (instance number), youmust change the instance number of one device object, so that all devices in thenetwork have a unique device instance.

BACnet


Object Type Type Enumeration Instance Property Name Property EnumerationDevice 8 3000

Full ReferenceMTII Chiller UC 3000

Evaporator Entering Water TemperatureThis output attribute indicates the temperature of the evaporator entering water temperature. (A4)


LONWORKS:°C


BACnet: -40–245°FLONWORKS:-40°–118° C

NA

BACnet



Full ReferenceMTII Chiller UC ####.EntEvapWaterTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoEntChwTemp Chiller temp_p 105 two bytes


Keypad Menu Path:Menu\view\Unit

\Water

ED 15062-0 43

Evaporator Flow Switch StatusThis output network variable indicates the status of water flow through the evaporator. (D7)



BACnet



Full ReferenceMTII Chiller UC ####.EvapWaterFlowStatus.Present_Value

Property Values0 = No Flow1 = Flow

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoChWFlow Proprietary switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 No Flow

1 Flow

Evaporator Leaving Water Temperature for UnitThis output network variable indicates the current temperature of the Evaporator leaving chilledwater. (A6)


LONWORKS:°C


BACnet: -40°–244°FLONWORKS:-40°–118°C

NA


Keypad MenuPath:Menu\View

\Unit WaterOR

Menu\View

Comp (2)

44 ED 15062-0

BACnet



Full ReferenceMTII Chiller UC ####.LvgEvapWaterTempUnit.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoLvgCHWTemp Chiller temp_p 105 two bytes

Evaporator Leaving Water Temperature for CompressorThis output network variable indicates the current temperature of the Evaporator leaving chilledwater temperature of the compressor selected with Compressor Select on page 34. (A14)

Measurement Units Data Type Valid Range Default ValueTemperature BACnet: °F BACnet: Signed Integer BACnet: -40°–244°F NA

BACnet



Full ReferenceMTII Chiller UC ####.LvgEvapWaterTempComp.Present_Value

Evaporator Pump Run HoursThis output network variable indicates the number of hours that the selected evaporator pump hasbeen turned on. There is a separate output for each pump. See Pump Select on page 54. (I47)


LONWORKS: Float Type unsignedlong

0 –65,535 NA

BACnet



Full ReferenceMTII Chiller UC ####.EvapPumpOperHours.Present_Value

Keypad MenuPath:Menu\View

\Comp


ED 15062-0 45

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoEvapPumpHrs Proprietary count 8 two bytes

Evaporator Refrigerant PressureThis output network variable indicates the current refrigerant pressure in the evaporator. There is aseparate output for each compressor. See Compressor Select on page 34. (A17)

Measurement Units Data Type Valid Range Default ValuePressure (gauge) BACnet: psi

LONWORKS:kPa

BACnet: Signed IntegerLONWORKS: Fixed-Point Scalar signedlong


NA

BACnet



Full ReferenceMTII Chiller UC ####.EvapPressure.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoEvapRefPress Proprietary press 30 two bytes

Evaporator Saturated Refrigerant TemperatureThis output network variable indicates the current saturated refrigerant temperature in the evaporator.There is a separate output for each compressor. See Compressor Select on page 34. (A16)


LONWORKS:°C



NA

BACnet



Full ReferenceMTII Chiller UC ####.EvapSatTemp.Present_Value


\Comp (2)

Keypad Menu Path:Menu\Unit

\Refrigerant (1)

46 ED 15062-0

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoSatEvapRefTemp Proprietary temp_p 105 two bytes

Evaporator Water Pump StatusThis output network variable indicates whether the selected pump has been commanded On or Off.See Pump Select on page 54. (D29)



BACnet



Full ReferenceMTII Chiller UC ####.EvapPumpState.Present_Value


LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoChWPump Proprietary switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Pump Commanded Off

1 Pump Commanded ON

Heat Recovery Entering Water TemperatureThis output network variable indicates the current temperature of the water entering the heat recoverysection. (A22)


LONWORKS:°C



NA



ED 15062-0 47

BACnet



Full ReferenceMTII Chiller UC ####.HeatRecEntWaterTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoEntHRWTemp Proprietary temp_p 105 two bytes

Heat Recovery Leaving Water TemperatureThis output network variable indicates the current temperature of the water leaving the heat recoverysection. (A23)


LONWORKS:°C



NA

BACnet



Full ReferenceMTII Chiller UC ####.HeatRecLvgWaterTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoLvgHRWTemp Proprietary temp_p 105 two bytes

Heat SetpointThis input network variable provides the heating setpoint when the chiller is operating in the heatmode. The value is ignored if the controller is in cooling mode. The BACnet property is acommandable property of a Multi-state Output object. Refer to the appropriate Operating Manual forsuitable variable values. (A50)


LONWORKS:°C

BACnet: Signed IntegerLONWORKS: Fixed Point Scalar signedlong

BACnet: 100–150°FLONWORKS: 37.8–65.6°C

See Below



\Set\Unit SPs (3)

48 ED 15062-0

BACnetThis commandable property sets the temperature of the Leaving Chilled Water when it is in theheating mode.



Full ReferenceMTII Chiller UC ####.NetworkHeatTempSetpoint.Present_Value


LONWORKS

This input network variable provides the heating setpoint when the chiller is operating in the heatmode. The value is ignored if the controller is in cooling mode.



IndexnviHeatSetpt Chiller temp_p 105 two bytes NA NA

Heat Setpoint (LONWORKS Configuration)This configuration network parameter establishes the default Setpoint for the Leaving WaterTemperature when it is in the heating mode, unless the configuration parameter nciDefaults =1 (seeDefault Values on page 41). If nciDefaults = 1, the default values are the values specified duringmanufacturing. Refer to the appropriate Operating Manual for suitable variable values.

Measurement Units Data Type Valid Range Default ValueTemperature LONWORKS:

°CLONWORKS: Fixed Point Scalar signedlong

LONWORKS: 10–93°C

See Below

LONWORKS

Default Value37.8°CThe chiller object uses the configuration value of nciHeatSetpt on power-up or loss ofcommunication unless the configuration parameter nciDefaults =1 (see Default Values on page 41).



IndexnciHeatSetpt Chiller temp_p 105 two bytes SCPT_HeatSetpoint 78


ED 15062-0 49

Ice SetpointThe Ice Setpoint data point determines the temperature of the Leaving Chilled Water. LonTalknetwork variables set the operating Temperature. The BACnet property is a commandable propertyof a Analog Output object. Refer to the appropriate Operating Manual for suitable variable values.(A30)


LONWORKS:°C


BACnet: 15 – 35°FLONWORKS: -9.4–1.7°C

See Below

BACnetThis commandable property sets the temperature of the Leaving Chilled Water. This level may beadjusted via an operator workstation or other network device. When this property is read, it indicatesthe current value of the temperature of the Leaving Chilled Water.



Full ReferenceMTII Chiller UC ####.NetworkIceTempSetpoint.Present_Value


LONWORKS

Input (nvi)This input network variable provides the Ice setpoint of the Leaving Chilled Water when the chiller isoperating in the Ice Mode.


IndexSNVT Size

nviIceSpt Chiller temp_p 105 two bytes

Default Value-3.9°C


\Set\Unit SPs (3)

50 ED 15062-0

Liquid Line Refrigerant PressureThis output network variable indicates the current liquid line refrigerant pressure. (A38)

Measurement Units Data Type Valid Range Default ValuePressure BACnet: psi

LONWORKS:kPa

BACnet: Signed IntegerLONWORKS: Fixed-PointScalar signed long


NA

BACnet



Full ReferenceMTII Chiller UC ####.LiquidLinePress.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoLiquLinePress Proprietary press 30 two bytes

Liquid Line Refrigerant TemperatureThis output network variable indicates the current liquid line refrigerant temperature. (A36)


LONWORKS:°C


BACnet:-40°–244°FLONWORKS:-40°–118°C

NA

BACnet



Full ReferenceMTII Chiller UC ####.LiquidLineTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoLiquLineTemp Proprietary temp_p 105 two bytes



\Unit \Refrg (2)Liquid Line=

ED 15062-0 51

Maximum Send TimeThis configuration network parameter controls the maximum period of time that expires before thefollowing network variables are transmitted.

! nvoChillerStat! nvoActiveSetpt! nvoActualCapacity! nvoLvgChWTemp! nvoLvgCndWTemp! nvoEntCndWTemp! nvoEntChWTemp

Measurement Units Data Type Valid Range Default ValueElapsed Time seconds BACnet: Unsigned Integer


0–6553.4 sec 0 (no automatic update)

LONWORKS



IndexnciMaxSendTime Chiller time_sec 107 two bytes SCPT_maxSendTime 49

Minimum Send TimeThis configuration network parameter controls the minimum period of time that expires beforeobjects can be retransmitted.

Measurement Units Data Type Valid Range Default ValueElapsed Time seconds BACnet: Unsigned Integer


0–6553.4 sec 0 (no automatic update)

LONWORKS



IndexnciMinSendTime Chiller time_sec 107 two bytes SCPT_minSendTime 52

Oil Feed PressureThis output network variable indicates the current compressor oil feed pressure. There is a separateoutput for each compressor. See Compressor Select on page 34. (A32)


LONWORKS:kPa



NA




\Comp (3)

52 ED 15062-0

BACnet



Full ReferenceMTII Chiller UC ####.OilFeedPressure.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOilFeedPress Proprietary press 30 two bytes

Oil Feed TemperatureThis output network variable indicates the current compressor oil feed temperature. There is aseparate output for each compressor. See Compressor Select on page 34. (A34)


LONWORKS:°C



NA

BACnet



Full ReferenceMTII Chiller UC ####.OilFeedTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOilFeedTemp Proprietary temp_p 105 two bytes

Oil Sump PressureThis output network variable indicates the current compressor oil sump pressure. There is a separateoutput for each compressor. See Compressor Select on page 34. (A33)


LONWORKS:kPa



NA


\Comp (4)


ED 15062-0 53

BACnet



Full ReferenceMTII Chiller UC ####.OilSumpPressure.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOilSumpPress Proprietary press 30 two bytes

Oil Sump TemperatureThis output network variable indicates the current compressor oil sump temperature. There is aseparate output for each compressor. See Compressor Select on page 34. (A35)


LONWORKS:°C



NA

BACnet



Full ReferenceMTII Chiller UC ####.OilSumpTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOilSumpTemp Proprietary temp_p 105 two bytes

Outdoor Air TemperatureThis output network variable indicates the current outdoor air temperature. (A39)


LONWORKS:°C



NA


\Comp (4)


54 ED 15062-0

BACnet



Full ReferenceMTII Chiller UC ####.OutdoorAirTemp.Present_Value

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoOutdoorTemp Proprietary temp_p 105 two bytes

Pump SelectThis input network variable selects which pump (Number 1 or Number 2) supplies the data. Thecontroller returns the information for the appropriate Condenser or Evaporator pump. You must firstselect a pump then interrogate the selected pump. See Condenser Pump Run Hours on page 37 andEvaporator Pump Run Hours on page 43. (D19)


LONWORKS: structureEnumerated BACnet : 1=Pump No. 1

LONWORKS:0= Pump No. 1

BACnet



Full ReferenceMTII Chiller UC ####.PumpSelect.Present_Value

Property Values1=Pump #12=Pump #2

LONWORKS

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenviPumpSelect Proprietary Switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 Pump No. 1

1 Pump No. 2


ED 15062-0 55

Receive HeartbeatThis configuration network parameter defines maximum time that elapses after the last update to aspecified network variable input before the unit starts to use its default values. If this time expires thecontroller reverts to the default values of input network variables and configuration variables.

Measurement Units Data Type Valid Range Default ValueElapsed Time seconds (0,1) BACnet: Unsigned Integer

LONWORKS: Fixed Point Scalar -unsigned long

0.0 – 6553.4 sec (0.1 sec).0xFFFF represents invaliddata

0 Seconds

LONWORKS



IndexnciRcvHrtBt Proprietary time_sec 107 two bytes SCPT_maxRcvTime 49

Run EnabledThis output network variable indicates that the chiller can start if operating conditions are met. SeeChiller Status BACnet and Chiller Status LONWORKS on page 30 for details.

Measurement Units Data Type Valid Range Default ValueChiller Status NA BACnet: Enumerated


BACnet



Full ReferenceMTII Chiller UC ####.UnitOFF.Present_Value

Property Values0 = OFF1 = Run Allowed

LONWORKSThe LONWORKS equivalent of this data point is part of the Chiller Status LONWORKS (page 30)outputnetwork variable.




56 ED 15062-0

Alarms

Alarm ClassesBACnet alarms in a MicroTech II unit controller are divided into three classes: Faults, Problems, andWarnings. Fault alarms have the highest severity level. Problem alarms have medium severity level.Warning alarms have the lowest severity level.

Fault AlarmsFault alarms require an acknowledgment from the operator. These alarms indicate that thecompressor is shut down.

Problem AlarmsProblem alarms do not cause compressor shutdown but limit operation of the chiller in some way.

Warning AlarmsA warning is enunciated whenever an abnormal condition exists which does not affect chilleroperation.

BACnet Alarm HandlingThe BACnet Communication Module has three methods for handling BACnet alarms: AlarmAnnunciation, Poll Multiple, and Poll Singular.

Alarm AnnunciationThis method of alarm notification sends a BACnet ConfirmedEventNotification to a single BACnetdevice specified in the HTTP interface.The ConfirmedEventNotification Service includes the following Fields. See ANSI/ASHRAE 135-2001, BACnet® A Data Communication Protocol for Building Automation and Control Networks fordetailed definitions.

Table 4. Event Notification Service Details

Field SourceProcess Identifier Device Instance Process ID in the HTTP InterfaceInitiating Device Identifier Device Instance of the BCM as specified in the HTTP InterfaceEvent Object Identifier Object Instance that generated the Alarm. (Subtract 1000 from this

value to get the instance of the of the object in the BCM.)Time Stamp The time the BCM detected the alarm initiallyNotification Class P = Problems

W = WarningsF = Faults

Priority Priority specified in the HTTP InterfaceEvent Type Complex EventMessage Text Alarm Message Text as shown in Table 5.Notify Type ALARMAckRequired Notification Requirement as shown in the Ack column of Table 5.From State The Event State of the BCM before the occurrence of the event

that caused Alarm.To State The Event State of the BCM after the occurrence of the event that

caused the Alarm.

ED 15062-0 57

Field SourceEvent Values Conditions in the BCM at the time of the alarm. Each number in

the Event Values column of Table 5 is the instance number of anobject in the BCM that displays its present value in this field of theEvent Notification message.

Not all BACnet devices can receive an alarm message of this type. A BAS integrator may not want touse this method to handle alarms. If either case is true, the BAS integrator can use the Poll Multipleor Poll Singular method.

Poll MultipleThe Poll Multiple method requires that three objects in the BCM be polled for alarm notification.One object indicates Warning Alarms, one indicates Problem Alarms, and one indicates FaultAlarms. The BCM includes three Analog Input and three Multi-state objects that contain the alarminformation. The Analog Input objects return a number for an alarm condition. The number is foundin the Index column of Table 5. The Multi-state object returns the same number for the alarmcondition and the text of the alarm message found in the Alarm Message Text column of Table 5.

Warning Alarms, Analog Input ObjectThis BACnet object indicates the index number of warning alarms. If the present value is zero, noalarm has occurred. See Table 5 on page 60.

Measurement Units Data Type Valid Range Default ValueNA NA Integer Enumerated NA



MTII Chiller UC ####.AIWarningAlarm.Present_Value

Problem Alarms, Analog Input ObjectThis BACnet object indicates the index number of problem alarms. If the present values is zero, noalarm has occurred. See Table 5 on page 60.




MTII Chiller UC ####.AIProblemAlarm.Present_Value

58 ED 15062-0

Fault Alarms, Analog Input ObjectThis BACnet object indicates the index number of fault alarms. If the present values is zero, no alarmhas occurred. See Table 5 on page 60.




MTII Chiller UC ####.AIFaultAlarm.Present_Value

Warning Alarms, Multi-state Input ObjectThis BACnet object indicates the index number of warning alarms in the present value property andthe text of the alarm message in the state text property. If the present values is zero, no alarm hasoccurred. See Table 5 on page 60.



Multi-state Input 13 902 Present Value 85Full Reference

MTII Chiller UC ####.MSIWarningAlarm.Present_Value

Measurement Units Data Type Valid Range Default ValueNA NA Character String NA NA


Multi-state Input 13 902 State Text 110Full Reference

MTII Chiller UC ####.MSIWarningAlarm.State_Text

Problem Alarms, Multi-state Input ObjectThis BACnet object indicates the index number of problem alarms in the present value property andthe text of the alarm message in the state text property. If the present values is zero, no alarm hasoccurred. See Table 5 on page 60.




MTII Chiller UC ####.MSIProblemAlarm.Present_Value

ED 15062-0 59




MTII Chiller UC ####.MSIProblemAlarm.State_Text

Fault Alarms, Multi-state Input ObjectThis BACnet object indicates the index number of fault alarms in the present value property and thetext of the alarm message in the state text property. If the present values is zero, no alarm hasoccurred. See Table 5 on page 60.




MTII Chiller UC ####.MSIFaultAlarm.Present_Value




MTII Chiller UC ####.MSIFaultAlarm.State_Text

Poll Singular

Alarm Digital OutputThe Poll Singular method requires that one Binary Input object in the BCM be polled for alarmnotification. This object indicates whether an alarm condition has occurred. The operator interfacedisplays the alarm text. (D3)



Binary Input 3 40 Present Value 85Full Reference

MTII Chiller UC ####.AlarmDigitalOutput.Present_ValueProperty Values

0 = No Alarm2 = Alarm

60 ED 15062-0

BACnet Clear AlarmsThis BACnet object clears all active alarms. It cannot clear all alarms in the Fault category (alarmsthat shut down the chiller). They would have to be cleared at the chiller panel. The alarms that cannotbe cleared over the network (but can be cleared at the chiller) are: (D24)

! Low Evaporator Pressure! High Condenser Pressure (by pressure sensor)! High Condenser Pressure (by pressure switch)! Low Oil Pressure! Freeze Protection! High Motor Temperature



Binary Value 5 42 Present Value 85Full Reference

MTII Chiller UC ####.ClearAlarm.Present_ValueProperty Values

0 = Normal1 = Clear Alarm

BACnet Alarm MessagesThe following table identifies each alarm, class, whether an acknowledgement is required, the alarmtext, and indicates system parameters at the time of the alarm.

Table 5. BACnet Alarms

Alarm Class Ack Description EventValues

WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

1 W N NO ACTION - Condenser Entering Water TemperatureSensor Failure

1,2,3,4,9 X

2 W N NO ACTION - Evaporator Entering Water TemperatureSensor Failure

1,2,3,4,9,10 X X

3 W N NO ACTION - Liquid Line Refrigerant TemperatureSensor Failure

1,2,3,4,9 X

4 W N NO ACTION (STOP if Heat) - Condenser Leaving WaterTemperature Sensor Failure

1,2,3,4,9 X

5 P N RESTART DELAYED - Power Loss While Running #1 1,2,9,10 X




10 P N START INHIBITED - Ambient Temperature Low 1,2,3,4,9,10 X X X

11 P N INHIBIT LOAD - Condenser Pressure High #1 1,2,9,10 X




15 P N UNLOAD - Condenser Pressure High 1,2,9,10 X

16 P N UNLOAD - Condenser Pressure High #1 1,2,3,4,9,10 X X

17 P N UNLOAD - Condenser Pressure High #2 1,2,3,4,9,10 X X

18 P N UNLOAD - Condenser Pressure High #3 1,2,9,10 X

ED 15062-0 61


WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

19 P N UNLOAD - Condenser Pressure High #4 1,2,9,10 X

20 P N CONDENSER PUMP ON - Condenser Water FreezeProtection #1

1,2,3,4,9 X

21 P N CONDENSER PUMP ON - Condenser Water FreezeProtection #2

1,2,3,4,9 X

24 P N PUMP #2 START ATTEMPTED - Condenser Pump #1Failure

1,2,3,4,9 X

25 P N PUMP #1 START ATTEMPTED - Condenser Pump #2Failure

1,2,3,4,9 X

26 P N LOAD - Discharge Temperature High #1 1,2,3,4,9 X

27 P N LOAD - Discharge Temperature High #2 1,2,3,4,9 X

30 P N NO EWT RESET - Entering Evaporator TemperatureSensor Failure

1,2,3,4,9 X

31 P N INHIBIT LOAD - Evaporator Pressure Low 1,2,3,4,9,10 X X

32 P N INHIBIT LOAD - Evaporator Pressure Low #1 1,2,3,4,9,10 X X X

33 P N INHIBIT LOAD - Evaporator Pressure Low #2 1,2,3,4,9,10 X X X

34 P N INHIBIT LOAD - Evaporator Pressure Low #3 1,2,9,10 X

35 P N INHIBIT LOAD - Evaporator Pressure Low #4 1,2,9,10 X

36 P N UNLOAD - Evaporator Pressure Low 1,2,3,4,9,10 X X

37 P N UNLOAD - Evaporator Pressure Low #1 1,2,3,4,9,10 X X X

38 P N UNLOAD - Evaporator Pressure Low #2 1,2,3,4,9,10 X X X

38 P N UNLOAD - Evaporator Pressure Low #3 1,2,9,10 X

38 P N UNLOAD - Evaporator Pressure Low #4 1,2,9,10 X

41 P N UNLOAD - Compressor Motor Current High #1 1,2,3,4,9,10 X X

42 P N UNLOAD - Compressor Motor Current High #2 1,2,3,4,9,10 X X

43 P N UNLOAD - Compressor Motor Current High #3 1,2,9,10 X

44 P N UNLOAD - Compressor Motor Current High #4 1,2,9,10 X

45 P N EVAPORATOR PUMP ON - Evaporator Water FreezeProtection #1

1,2,3,4,9 X

46 P N EVAPORATOR PUMP ON - Evaporator Water FreezeProtection #2

1,2,3,4,9 X

49 P N PUMP #2 START ATTEMPTED - Evaporator Pump #1Failure

1,2,3,4,9 X

50 P N PUMP #1 START ATTEMPTED - Evaporator Pump #2Failure

1,2,3,4,9 X

52 F R COMPRESSOR SHUTDOWN - Outside AirTemperature Sensor Fault

1,2,3,4,9,10 X X X

61 F R COMPRESSOR SHUTDOWN - Motor Current Low #1 1,2,3,4,9,10 X X

62 F R COMPRESSOR SHUTDOWN - Motor Current Low #2 1,2,3,4,9,10 X X

63 F R COMPRESSOR SHUTDOWN - Motor Current Low #3 1,2,9,10 X

64 F R COMPRESSOR SHUTDOWN - Motor Current Low #4 1,2,9,10 X

65 F R UNIT SHUTDOWN - Motor Protector Trip 1,2,3,4,9,10 X

66 F R COMPRESSOR SHUTDOWN - Motor Protector Trip #1 1,2,3,4,9,10 X

67 F R COMPRESSOR SHUTDOWN - Motor Protector Trip #2 1,2,3,4,9,10 X

68 F R COMPRESSOR SHUTDOWN - Motor TemperatureHigh #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

72 F R COMPRESSOR SHUTDOWN - Phase Loss #1 1,2,3,4,9,10 X X

73 F R COMPRESSOR SHUTDOWN - Phase Loss #2 1,2,3,4,9,10 X X

62 ED 15062-0


WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

74 F R COMPRESSOR SHUTDOWN - Phase Loss #3 1,2,9,10 X

75 F R COMPRESSOR SHUTDOWN - Phase Loss #4 1,2,9,10 X

88 F R COMPRESSOR SHUTDOWN - Condenser PressureSensor Fault

1,2,3,4,9,10 X X

89 F R COMPRESSOR SHUTDOWN - Condenser PressureSensor Fault #1

1,2,3,4,9,10 X X X


1,2,3,4,9,10 X X X


1,2,9,10 X


1,2,9,10 X

93 F R COMPRESSOR SHUTDOWN - Condenser Water FlowLoss

1,2,3,4,9 X

94 F R COMPRESSOR SHUTDOWN - Condenser PressureHigh

1,2,3,4,9,10 X X

95 F R COMPRESSOR SHUTDOWN - Condenser PressureHigh #1

1,2,3,4,9,10 X X X


1,2,3,4,9,10 X X X


1,2,9,10 X


1,2,9,10 X

99 F R COMPRESSOR OFF - Current High with CompressorOFF #1

1,2,3,4,9 X

100 F R COMPRESSOR OFF - Current High with CompressorOFF #2

1,2,3,4,9 X

103 F R COMPRESSOR SHUTDOWN - Discharge TemperatureSensor Fault #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

107 F R COMPRESSOR SHUTDOWN - Discharge TemperatureHigh #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

111 F R COMPRESSOR SHUTDOWN - Condenser EnteringWater Temperature Sensor Fault

1,2,3,4,9,10 X

112 F R COMPRESSOR SHUTDOWN - Evaporator Water FlowLoss

1,2,3,4,9,10 X X X X

113 F R COMPRESSOR SHUTDOWN - Evaporator LeavingWater Temperature Low (Freeze)

1,2,3,4,9,10 X X X

114 F R COMPRESSOR SHUTDOWN - Evaporator PressureLow

1,2,3,4,9,10 X X

115 F R COMPRESSOR SHUTDOWN - Evaporator PressureLow #1

1,2,3,4,9,10 X X X


1,2,3,4,9,10 X X X


1,2,9,10 X


1,2,9,10 X

119 F R COMPRESSOR SHUTDOWN - Evaporator PressureSensor Fault

1,2,3,4,9,10 X X

120 F R COMPRESSOR SHUTDOWN - Evaporator PressureSensor Fault #1

1,2,3,4,9,10 X X X

ED 15062-0 63


WSC/WDC/WPV

AGZ/ACZ

WGZ AGS


1,2,3,4,9,10 X X X


1,2,9,10 X


1,2,9,10 X

124 F R COMPRESSOR SHUTDOWN - Ground Fault Trip #1 1,2,3,4,9,10 X X

125 F R COMPRESSOR SHUTDOWN - Ground Fault Trip #2 1,2,3,4,9,10 X X

126 F R COMPRESSOR SHUTDOWN - Ground Fault Trip #3 1,2,9,10 X

127 F R COMPRESSOR SHUTDOWN - Ground Fault Trip #4 1,2,9,10 X

128 F R COMPRESSOR SHUTDOWN - Lift Pressure Low #1 1,2,9,10 X




132 F R COMPRESSOR SHUTDOWN - Liquid Line PressureSensor Fault #1

1,2,9,10 X


1,2,9,10 X


1,2,9,10 X


1,2,9,10 X

136 F R COMPRESSOR SHUTDOWN - Liquid LineTemperature Sensor Fault #1

1,2,9,10 X


1,2,9,10 X


1,2,9,10 X


1,2,9,10 X

140 F R UNIT LOCKOUT - Number of Allowed Re-StartsExceeded

1,2,9,10 X

141 F R COMPRESSOR LOCKOUT - Number of Allowed Re-Starts Exceeded #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

145 F R COMPRESSOR SHUTDOWN - Evaporator LeavingWater Temperature Sensor Fault

1,2,3,4,9,10 X X X X

146 F R COMPRESSOR SHUTDOWN - Evaporator LeavingWater Temperature Sensor Fault #1

1,2,3,4,9 X

147 F R COMPRESSOR SHUTDOWN - Evaporator LeavingWater Temperature Sensor Fault #2

1,2,3,4,9 X

150 F R UNIT STOP - Mechanical High Pressure Trip 1,2,9,10 X

151 F R COMPRESSOR SHUTDOWN - Mechanical HighPressure Trip #1

1,2,3,4,9,10 X X X


1,2,3,4,9,10 X X X


1,2,9,10 X


1,2,9,10 X

155 F R COMPRESSOR SHUTDOWN - Oil Net Pressure Low #1 1,2,3,4,9 X

156 F R COMPRESSOR SHUTDOWN - Oil Net Pressure Low #2 1,2,3,4,9 X

159 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureHigh #1

1,2,3,4,9 X

64 ED 15062-0


WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

160 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureHigh #2

1,2,3,4,9 X

163 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureLow #1

1,2,3,4,9 X

164 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureLow #2

1,2,3,4,9 X

167 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureSensor Fault #1

1,2,3,4,9 X

168 F R COMPRESSOR SHUTDOWN - Oil Feed TemperatureSensor Fault #2

1,2,3,4,9 X

171 F R COMPRESSOR SHUTDOWN - Oil Level Low #1 1,2,9,10 X




175 F R COMPRESSOR SHUTDOWN - Oil Filter Delta PressureHigh #1

1,2,9,10 X


1,2,9,10 X


1,2,9,10 X


1,2,9,10 X

179 F R COMPRESSOR SHUTDOWN - Oil Feed PressureSensor Fault #1

1,2,3,4,9 X

180 F R COMPRESSOR SHUTDOWN - Oil Feed PressureSensor Fault #2

1,2,3,4,9 X

183 F R COMPRESSOR SHUTDOWN - Oil Sump PressureSensor Fault #1

1,2,3,4,9 X

184 F R COMPRESSOR SHUTDOWN - Oil Sump PressureSensor Fault #2

1,2,3,4,9 X

187 F R COMPRESSOR SHUTDOWN - Oil Sump TemperatureSensor Fault #1

1,2,3,4,9 X

188 F R COMPRESSOR SHUTDOWN - Oil Sump TemperatureSensor Fault #2

1,2,3,4,9 X

191 F R COMPRESSOR SHUTDOWN - Starter FaultCompressor

1,2,9,10 X

192 F R COMPRESSOR SHUTDOWN - Starter FaultCompressor #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

196 F R COMPRESSOR SHUTDOWN - No Starter Transition #1 1,2,3,4,9 X

197 F R COMPRESSOR SHUTDOWN - No Starter Transition #2 1,2,3,4,9 X

200 F R COMPRESSOR START ABORT - Oil Pressure Low #1 1,2,3,4,9 X

201 F R COMPRESSOR START ABORT - Oil Pressure Low #2 1,2,3,4,9 X

204 F R COMPRESSOR SHUTDOWN - Subcooling Low #1 1,2,9,10 X




208 F R COMPRESSOR SHUTDOWN - Surge Suction SuperheatHigh-Running #1

1,2,3,4,9 X

209 F R COMPRESSOR SHUTDOWN - Surge Suction SuperheatHigh-Running #2

1,2,3,4,9 X

212 F R COMPRESSOR SHUTDOWN - Surge Suction SuperheatHigh-Starting #1

1,2,3,4,9 X

213 F R COMPRESSOR SHUTDOWN - Surge Suction SuperheatHigh-Starting #2

1,2,3,4,9 X

ED 15062-0 65


WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

216 F R COMPRESSOR SHUTDOWN - Suction TemperatureSensor Fault #1

1,2,3,4,9,10 X X


1,2,3,4,9,10 X X


1,2,9,10 X


1,2,9,10 X

220 F R COMPRESSOR START ABORT - Vanes Open OR NoCondenser Flow #1

1,2,3,4,9 X

221 F R COMPRESSOR START ABORT - Vanes Open OR NoCondenser Flow #2

1,2,3,4,9 X

224 F R COMPRESSOR SHUTDOWN - (Check Chiller Displayfor Cause)

1,2,3,4,9,10 X X X X

66 ED 15062-0

LONWORKS Alarm HandlingTwo LONWORKS network variables indicate alarm conditions and one network variable clearsalarms. The Chiller Status LONWORKS (see on page 30) network output variable indicates that theunit controller is in alarm, but it does not identify the alarm condition. The Current Alarm networkoutput variable indicates the alarm condition.

Current AlarmThis network output variable indicates the current alarm. The type of alarm is included in the textstring. Alarm messages are listed in Table 6. The unit controller can accommodate 15 simultaneousalarms. Alarm messages are sent sequentially one every five seconds.

Measurement Units Data Type Valid Range Default ValueAlarm Message NA Structure 0–30 characters plus a NUL terminator NA

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenvoAlarmDescr Chiller str_asc 36 31 bytes max


unsigned char ascii[31];} SNVT_str_asc;

Network Clear AlarmThis network input variable clears all active alarms. It cannot clear all alarms in the Fault category(alarms that shut down the chiller). They would have to be cleared at the chiller panel. The alarmsthat cannot be cleared over the network (but can be cleared at the chiller) are:

! Low Evaporator Pressure! High Condenser Pressure (by pressure sensor)! High Condenser Pressure (by pressure switch)! Low Oil Pressure! Freeze Protection! High Motor Temperature

Besides the Current Alarm network variable, part of nvoChillerStat indicates whether the chiller is inan alarm condition, but it does not describe the alarm condition.

Measurement Units Data Type Valid Range Default ValueN.A. N.A. Structure See Below NA

Variable DetailsLONWORKS Name Profile SNVT Type SNVT Index SNVT SizenviClearAlarm Proprietary switch 95 two bytes



} SNVT_switch;

Valid RangeValue Field unusedState Field 0 No Alarm

1 Clear Alarm


\Alarm\Active


ED 15062-0 67

LONWORKS Alarm MessagesTable 6. LONWORKS Alarm Messages

Alarm Description LonTalk Message WSC/WDC/WPV

AGZ/ACZ

WGZ AGS

0 (reserved)1 Entering Condenser Water Temperature Sensor

FaultWARN-Ent Cond Temp SensorFail

X

2 Entering Evaporator Water Temperature SensorFault

WARN-Ent Evap Temp SensorFail

X X

3 Liquid Line Refrigerant Temperature SensorFault

WARN-Liq Line Temp Sensor Fail X

4 Leaving Condenser Water Temperature SensorFault

WARN-Lvg Cond Temp SensorFail

X

5 Repower After Power Loss #1 WARN-Pwr Loss While Running#1

X


X


X


X

9 Expansion Alarm - WARNING WARNING(Check Unit for Detail) X X X10 Low Ambient Temperature Lockout NO START - Ambient Temp Low X X11 High Condenser Pressure - Inhibit Loading

Circuit #1NO LOAD - Cond Press High #1 X

12 High Condenser Pressure - Inhibit LoadingCircuit #2

NO LOAD - Cond Press High #2 X





15 High Condenser Pressure - Unload UNLOAD - Cond Press High X16 High Condenser Pressure - Unload Circuit #1 UNLOAD - Cond Press High #1 X17 High Condenser Pressure - Unload Circuit #2 UNLOAD - Cond Press High #2 X18 High Condenser Pressure - Unload Circuit #3 UNLOAD - Cond Press High #3 X19 High Condenser Pressure - Unload Circuit #4 UNLOAD - Cond Press High #4 X20 Condenser Water Freeze Protect Comp #1 PUMP ON - Cond Water Freeze #1 X21 Condenser Water Freeze Protect Comp #2 PUMP ON - Cond Water Freeze #2 X24 Condenser Pump #1 Fault PUMP 2 ON - Cond Pump Fail #1 X25 Condenser Pump #2 Fault PUMP 1 ON - Cond Pump Fail #2 X26 High Discharge Temperature Comp #1 LOAD - Discharge Temp High #1 X27 High Discharge Temperature Comp #2 LOAD - Discharge Temp High #2 X30 Entering Evap Temperature Sensor Fault (EWT

reset active)NO RESET-Evap EWT Sensor Fail X

31 Low Evaporator Pressure - Inhibit Loading NO LOAD - Evap Press Low X X32 Low Evaporator Pressure - Inhibit Loading

Circuit #1NO LOAD - Evap Press Low #1 X X

33 Low Evaporator Pressure - Inhibit LoadingCircuit #2

NO LOAD - Evap Press Low #2 X X


NO LOAD - Evap Press Low #3 X


NO LOAD - Evap Press Low #4 X

36 Low Evaporator Pressure - Unload UNLOAD - Evap Press Low X X37 Low Evaporator Pressure - Unload Circuit #1 UNLOAD - Evap Press Low #1 X X38 Low Evaporator Pressure - Unload Circuit #2 UNLOAD - Evap Press Low #2 X X39 Low Evaporator Pressure - Unload Circuit #3 UNLOAD - Evap Press Low #3 X40 Low Evaporator Pressure - Unload Circuit #4 UNLOAD - Evap Press Low #4 X41 High Motor Current On Compressor #1 UNLOAD - Comp Current High #1 X X42 High Motor Current On Compressor #2 UNLOAD - Comp Current High #2 X X44 High Motor Current On Compressor #3 UNLOAD - Comp Current High #3 X45 High Motor Current On Compressor #4 UNLOAD - Comp Current High #4 X46 Evaporator Freeze Protect Comp #1 PUMP ON - Evap Water Freeze #1 X

68 ED 15062-0


AGZ/ACZ

WGZ AGS

47 Evaporator Freeze Protect Comp #2 PUMP ON - Evap Water Freeze #2 X50 Evaporator Pump #1 Fault START#2 - Evap Pump Fail #1 X51 Evaporator Pump #2 Fault START#1 - Evap Pump Fail #2 X52 Expansion Alarm - PROBLEM PROBLEM(Check Unit for Detail) X X X53 Outside Ambient Temperature Sensor Fault UNIT STOP-

AmbAirTempSensorFailX X

54 Low Motor Current Comp #1 COMP STOP - Current Low #1 X55 Low Motor Current Comp #2 COMP STOP - Current Low #2 X56 Motor Protection UNIT STOP-Comp Motor

ProtectorX

57 Motor Protection Circuit #1 COMP STOP-Motor Protection #1 X58 Motor Protection Circuit #2 COMP STOP-Motor Protection #2 X59 High Motor Temperature Comp #1 COMP STOP - Motor Temp High

#1X X

60 High Motor Temperature Comp #2 COMP STOP - Motor Temp High#2

X X


X


X

63 Condenser Pressure Sensor Fault COMP STOP-CondPressSensFail X X64 Condenser Pressure Sensor Fault Circuit #1 COMP STOP-CondPressSensFail

#1X X

65 Condenser Pressure Sensor Fault Circuit #2 COMP STOP-CondPressSensFail#2

X X

66 Condenser Pressure Sensor Fault Circuit #3 COMP STOP-CondPressSensFail#3

X

67 Condenser Pressure Sensor Fault Circuit 4 COMP STOP-CondPressSensFail#4

X

68 No Condenser Water Flow COMP STOP-Cond Water FlowLoss

X

69 High Condenser Pressure COMP STOP - Cond Press High X X70 High Condenser Pressure Circuit #1 COMP STOP - Cond Press High #1 X X71 High Condenser Pressure Circuit #2 COMP STOP - Cond Press High #2 X X72 High Condenser Pressure Circuit #3 COMP STOP - Cond Press High #3 X73 High Condenser Pressure Circuit #4 COMP STOP - Cond Press High #4 X74 No Compressor Stop Comp #1 STOP Current High w/Comp Off#1 X75 No Compressor Stop Comp #2 STOP Current High w/Comp Off#2 X76 Discharge Temperature Sensor Fault Circuit #1 COMP STOP-DischTempSensFail

#1X X

77 Discharge Temperature Sensor Fault Circuit #2 COMP STOP-DischTempSensFail#2

X X


X


X

80 High Discharge Temperature Circuit #1 COMP STOP-DischargeTempHigh#1

X X


X X


X


X

84 Entering Condenser Water Temperature SensorFault

COMP STOP-EntCondTempSensFail

85 No Evaporator Water Flow COMP STOP-Evap Water FlowLoss

X X X

86 Evaporator Water Freeze Protect COMP STOP - Evap Water Freeze X X87 Low Evaporator Pressure COMP STOP - Evap Press Low X X88 Low Evaporator Pressure Circuit #1 COMP STOP - Evap Press Low #1 X X89 Low Evaporator Pressure Circuit #2 COMP STOP - Evap Press Low #2 X X90 Low Evaporator Pressure Circuit #3 COMP STOP - Evap Press Low #3 X

ED 15062-0 69


AGZ/ACZ

WGZ AGS

91 Low Evaporator Pressure Circuit #4 COMP STOP - Evap Press Low #4 X92 Evaporator Pressure Sensor Fault UNIT STOP-EvapPressSensor Fail X X93 Evaporator Pressure Sensor Fault Circuit #1 COMP STOP-EvapPressSensFail

#1X X

94 Evaporator Pressure Sensor Fault Circuit #2 COMP STOP-EvapPressSensFail#2

X X


X


X

97 Ground Fault Protection #1 COMP STOP-Ground Fault Trip#1

X X


X X


X


X

101 Below Minimum Lift Pressure Circuit #1 COMP STOP-Lift Pressure Low #1 X102 Below Minimum Lift Pressure Circuit #2 COMP STOP-Lift Pressure Low #2 X103 Below Minimum Lift Pressure Circuit #3 COMP STOP-Lift Pressure Low #3 X104 Below Minimum Lift Pressure Circuit #4 COMP STOP-Lift Pressure Low #4 X105 Liquid Line Pressure Sensor Fault Circuit #1 COMP STOP-LiqLPressSensFail

#1X

106 Liquid Line Pressure Sensor Fault Circuit #2 COMP STOP-LiqLPressSensFail#2

X


X


X

109 Liquid Line Refrigerant Temperature SensorFault Circuit #1

COMP STOP-LiqLTempSens Fail#1

X



X



X



X

113 Re-Start Fault UNIT LOCKOUT - Re-Start Fault X114 Re-Start Fault Circuit #1 COMP LOCKOUT-Re-Start Fault

#1X

115 Re-Start Fault Circuit #2 COMP LOCKOUT-Re-Start Fault#2

X


X


X

118 Leaving Evaporator Water Temperature SensorFault

UNIT STOP-Evap LWT SensorFail

X X X

119 Leaving Evaporator Water Temperature SensorFault Comp #1

COMP STOP-EvapLWT SensFail#1

X

120 Leaving Evaporator Water Temperature SensorFault Comp #2

COMP STOP-EvapLWT SensFail#2

X

122 Mechanical High Pressure Circuit #1 COMP STOP-MechHighPressTrip#1

X X


X X


X


X

126 Low Oil Net Pressure Comp #1 COMP STOP-Oil Net Press Low#1

X

127 Low Oil Net Pressure Comp #2 COMP STOP-Oil Net Press Low#2

X

70 ED 15062-0


AGZ/ACZ

WGZ AGS

128 High Oil Feed Temperature Comp #1 COMP STOP-Oil Feed Temp High#1

X

129 High Oil Feed Temperature Comp #2 COMP STOP-Oil Feed Temp High#2

X

130 Low Oil Feed Temperature Comp #1 COMP STOP-Oil Feed Temp Low#1

X

131 Low Oil Feed Temperature Comp #2 COMP STOP-Oil Feed Temp Low#2

X

132 Oil Feed Temperature Sensor Fault Comp #1 COMP STOP-OilFeedTmpSensFail #1

X

133 Oil Feed Temperature Sensor Fault Comp #2 COMP STOP-OilFeedTmpSensFail #2

X

134 Low Oil Level Circuit #1 COMP STOP - Oil Level Low #1 X135 Low Oil Level Circuit #2 COMP STOP - Oil Level Low #2 X136 Low Oil Level Circuit #3 COMP STOP - Oil Level Low #3 X137 Low Oil Level Circuit #4 COMP STOP - Oil Level Low #4 X138 High Oil Pressure Difference Circuit #1 COMP STOP-Oil Filter DP High

#1X

139 High Oil Pressure Difference Circuit #2 COMP STOP-Oil Filter DP High#2

X


X


X

142 Oil Feed Pressure Sensor Fault Comp #1 COMP STOP-OilFeedPrsSensFail#1

X

143 Oil Feed Pressure Sensor Fault Comp #2 COMP STOP-OilFeedPrsSensFail#2

X

144 Oil Sump Pressure Sensor Fault Comp #1 COMP STOP-OilSumpPrsSensFail#1

X

145 Oil Sump Pressure Sensor Fault Comp #2 COMP STOP-OilSumpPrsSensFail#2

X

146 Oil Sump Temperature Sensor Fault Comp #1 COMP STOP-OilSumpTmpSensFail #1

X

147 Oil Sump Temperature Sensor Fault Comp #2 COMP STOP-OilSumpTmpSensFail #2

X

148 Starter Fault Compressor #1 COMP STOP - Starter Fault #1 X X149 Starter Fault Compressor #2 COMP STOP - Starter Fault #2 X X150 Starter Fault Compressor #3 COMP STOP - Starter Fault #3 X151 Starter Fault Compressor #4 COMP STOP - Starter Fault #4 X152 No Starter Transition Comp #1 COMP STOP-NoStartrTransition

#1X

153 No Starter Transition Comp #2 COMP STOP-NoStartrTransition#2

X

154 No Oil Pressure Start Comp #1 COMP STOP-OilPressLow/Start#1

X

155 No Oil Pressure Start Comp #2 COMP STOP-OilPressLow/Start#2

X

156 Low Subcooling Circuit #1 COMP STOP - Subcooling Low #1 X157 Low Subcooling Circuit #2 COMP STOP - Subcooling Low #2 X158 Low Subcooling Circuit #3 COMP STOP - Subcooling Low #3 X159 Low Subcooling Circuit #4 COMP STOP - Subcooling Low #4 X160 Surge High Suct SH-Running Comp #1 COMP STOP-Suct SH High/Run

#1X

161 Surge High Suct SH-Running Comp #2 COMP STOP-Suct SH High/Run#2

X

162 Surge High Suct SH-Starting Comp #1 COMP STOP-Suct SHHigh/Start#1

X

163 Surge High Suct SH-Starting Comp #2 COMP STOP-Suct SHHigh/Start#2

X

164 Suction Temperature Sensor Fault Circuit #1 COMP STOP-SuctnTmpSensorFail#1

X X


X X

ED 15062-0 71


AGZ/ACZ

WGZ AGS


X


X

168 Vanes Open No Start Comp #1 NO START - Vanes Open #1 X169 Vanes Open No Start Comp #2 NO START - Vanes Open #2 X170 Expansion Alarm - FAULT FAULT (Check Unit for Detail) X X X

72 ED 15062-0

Appendix A: Protocol Implementation ConformanceStatement

This section contains the Protocol Implementation Conformance Statement (PICS) for theMicroTech II Chiller Unit Controller of McQuay International as required by ANSI/ASHRAEStandard 135-2001, BACnet: A Data Communication Protocol for Building Automation and ControlNetworks.

ED 15062-0 73

BACnet Protocol Implementation Conformance Statement

Date: April 2002Vendor Name: McQuay InternationalProduct Name: MicroTech II Chiller Unit ControllerProduct Model Number: MTII Chiller UCApplications Software Version:Firmware Revision:BACnet Protocol Revision: Version 1

Revision 2

Product DescriptionThe MicroTech II Chiller Unit Controller with optional BACnet Communication Module is amicroprocessor-based controller designed to operate McQuay International chillers and be integratedinto BACnet building automation systems.

BACnet Standardized Device ProfileBACnet Operator Workstation (B-OWS)BACnet Building Controller (B-BC)BACnet Advanced Application Specific Controller (B-AAC)BACnet Application Specific Controller (B-ASC)BACnet Smart Sensor (B-SS)BACnet Smart Actuator (B-SA)

BACnet Interoperability Building Blocks (BIBBs) SupportedBIBB Name DesignationData Sharing – ReadProperty – B DS-RP-BData Sharing – ReadPropertyMultiple – B DS-RPM-BData Sharing – WriteProperty – B DS-WP-BData Sharing – WritePropertyMultiple – B DS-WPM-BAlarm and Event – Notification Internal – B AE-N-I-BAlarm and Event – ACK – B AE-ACK-BAlarm and Event – Information – B AE-INFO-BDevice Management – Dynamic Device Binding – B DM-DDB-BDevice Management – Dynamic Object Binding – B DM-DOB-BDevice Management – DeviceCommunicationControl – B DM-DCC-BDevice Management – TimeSynchronization – B DM-TS-BDevice Management – UTCTimeSynchronization – B DM-UTC-BDevice Management – ReinitializeDevice – B DM-RD-BDevice Management – Restart – B DM-R-B

74 ED 15062-0

Standard Object Types SupportedObject-Type

Dyn

amic

ally

Cre

atab

leD

ynam

ical

lyD

elet

eabl

e

Optional PropertiesSupported

Writable Properties NotRequired To Be Writable

Analog Input DescriptionReliability

Analog Output DescriptionReliability

Relinquish Default

Binary Input DescriptionReliabilityInactive_TextActive_Text

Binary Value DescriptionReliabilityInactive_TextActive_TextPriority ArrayRelinquish Default

Present ValueRelinquish Default

Device DescriptionLocal_TimeLocal_DateUTC_OffsetDaylight_Savings_StatusMax_MasterMax_Info_Frames

Multi-state Input DescriptionReliabilityState_Text

Multi-state Output DescriptionReliabilityState_Text

Relinquish Default

ED 15062-0 75

Data Link Layer OptionsBACnet IP, (Annex J)ISO 8802-3, Ethernet (Clause 7)MS/TP master (Clause 9), baud rate(s): 9600, 19200, 38400

Segmentation CapabilitySegmented requests supported Window Size:Segmented responses supported Window Size:

Device Address BindingStatic Device Binding Yes

No

Networking OptionsRouter, Clause 6

Routing Configurations:Annex H, BACnet Tunneling Router over IPBACnet/IP Broadcast Management Device (BBMD)

Registrations by Foreign Devices? YesNo

Character Sets SupportedANSI X3.4 BM /Microsoft DBCS ISO 8859-1ISO 10646 (UCS-2) ISO 10646 (UCS-4) JIS C 6226

Note: Support for multiple character sets does not imply they can be supported simultaneously.

Non-BACnet Equipment/Network(s) SupportCommunication Gateway

Non-BACnet equipment/networks(s):

76 ED 15062-0

Index

AActive Setpoint 14, 16, 18, 20, 21Actual Capacity 14, 15, 16, 18, 20, 22Alarm 8, 15, 17, 56Alarm Annunciation 8, 56Alarm Classes 56Alarm Digital Output 17, 59ANSI 4, 5, 56, 72ASHRAE 4, 56, 72BBACnet Alarms 60BACnet Clear Alarms60BACnet/IP 4, 8, 9BCM 8, 56BIBBs 73CCapacity Limit 15, 16, 18, 19, 20, 22, 23Chiller Enable 15, 16, 19, 20, 24, 25Chiller Local/Remote 16, 20, 26Chiller Location 19, 20, 27Chiller Mode14, 15, 16, 19, 20, 27, 28Chiller On Off 16, 20, 29Chiller Status 15, 16, 18, 20, 26, 27, 28,29, 30, 55, 66Compressor Discharge Temperature

16, 18, 20, 32, 34Compressor Run Hours 16, 18, 20, 33, 34Compressor Select 16, 19, 20, 34Compressor Starts 16, 18, 20, 34, 35Compressor Suction Line Temperature

16, 18, 20, 34, 35Condenser Entering Water Temperature

15, 16, 18, 20, 36Condenser Flow Switch Status 16, 18, 20, 36Condenser Leaving Water Temperature

15, 16, 18, 20, 37Condenser Pump Run Hours 16, 18, 20, 37Condenser Refrigerant Pressure 16, 18,20, 34, 38Condenser Saturated Refrigerant Temperature

16, 18, 20, 34, 39Condenser Water Pump Status 16, 18, 20, 39

Cool Setpoint 15, 16, 19, 20, 40, 41Current Alarm 15, 18, 20, 66DData Point 4, 5, 14, 15, 16, 20Default Values 19, 20, 41device object6, 8, 20, 42Eenumeration 5, 6Ethernet 4, 9Evaporator Entering Water Temperature

15, 16, 18, 20, 42Evaporator Flow Switch Status 16, 18, 20, 43Evaporator Leaving Water Temperature

15, 16, 18, 20, 34, 43, 44Evaporator Pump Run Hours 16, 18, 21, 44Evaporator Refrigerant Pressure 16, 18,21, 34, 45Evaporator Saturated RefrigerantTemperature 16, 18, 21, 34, 45Evaporator Water Pump Status 16, 18, 21, 46FFault Alarms 17, 21, 56, 58, 59free topology network11FTT-10A 11HHeat Recovery Entering Water Temperature

16, 18, 21, 46Heat Recovery Leaving Water Temperature

16, 18, 21, 47Heat Setpoint 16, 19, 21, 47, 48HTTP Interface 6, 7, 8, 9, 42, 56HTTP Server7IIce Setpoint 16, 19, 21, 49identifier 5, 8instance 5, 6integrate4LLimited 16, 18, 20, 26Link Layer 75Liquid Line Refrigerant Pressure 17, 18,21, 50

ED 15062-0 77

Liquid Line Refrigerant Temperature17, 18, 21, 50

LonTalk 4, 20, 22LONWORKS 4, 10, 11, 15, 18, 19, 20, 21LonWorks Alarm Handling 66LonWorks Alarm Messages 67MMAC Address 9Maximum Send Time 19, 21, 51Minimum Send Time 19, 21, 51MS/TP 4, 8, 9NNetwork Clear Alarm 15, 19, 21, 66network variable 7, 10, 20Neuron 13Node ID13Oobject 5Oil Feed Pressure17, 18, 21, 34, 51Oil Feed Temperature 17, 18, 21, 34, 52Oil Sump Pressure 17, 18, 21, 34, 52Oil Sump Temperature 17, 18, 21, 34, 53Outdoor Air Temperature 17, 18, 21, 53

PPICS 5, 72Poll 56, 57, 59Problem Alarms 17, 21, 56, 57, 58Process ID 8, 56properties 4, 5, 20property 5, 20Pump Select 17, 19, 21, 54RReceive Heartbeat 19, 21, 55Run Enabled 17, 18, 21, 55Sservice pin 13setpoints5, 10Subnet 9, 13UUDP 9UTC 8WWarning Alarms 17, 21, 56, 57, 58XXIF 13

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