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Working with Equipment generated from the 2.0 help files

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Working with Equipmentgenerated from the 2.0 help files

.pdf created on March 14, 2003WebCTRL v2.0Copyright © 2003 Automated Logic Corporation. All rights reserved.1150 Roberts Boulevard, Kennesaw, GA 30144Phone (770) 429- 3000 FAX (770) 429- 3001Visit us at http:// www. automatedlogic. comAutomated Logic, the Automated Logic logo, Eikon, InterOp, and WebCTRL are registered trademarks ofAutomated Logic Corporation.BACnet is a registered trademark of ASHRAE.FrontPage is a registered trademark of Microsoft.All other brand and product names are trademarked by their respective owners.

Copyright © 2003 Working with Equipment Page 3

Working with equipment 4Graphics pages 6

Customizing graphics 7Properties pages 9

To view a Properties page 10Equipment level Properties page 11Point level Properties page 15Network tree Properties page 19

Downloading 23Types of downloads 26Downloading parameters and schedules 27To download memory, parameters, schedules, or BBMDs 28To use parameter uploads and downloads 33

Global Modify 35To obtain equipment information and relative paths using Global Modify 36

To change properties using Global Modify 39To view a Logic page 41

Logic pop-ups 43Properties pop-up 45Events pop-up 46Trends pop-up 47

Setpoints 48To change a setpoint 51Demand control 54Optimal start 57

Learning adaptive optimal start 60

Working with equipment After your system is configured, you can use WebCTRL to manage your building controls. WebCTRL provides several ways to view and modify system information, accessed by the action buttons at the top of the action pane.

NOTE You must be logged in to WebCTRL with the appropriate privileges to make changes to the system.

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1 The Schedules, Events, and Trends pages provide information that is covered in their own sections of this help file.

2 Working with Equipment focuses on the system and equipment information displayed on the Graphics, Properties, and Logic pages.

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Graphics pages Graphics pages provide an easy way to determine the current status of an area or piece of equipment. WebCTRL graphics include thermographic floorplans, equipment drawings, building perspectives, and aerial views.

On floorplans you can determine whether the zones are maintaining an acceptable temperature by looking at the thermographic colors being displayed on the graphic. On equipment graphics you can see whether the dampers are open and the fans are running. The Graphics page also shows the current status of setpoints, temperatures, and other points.

In addition to showing current conditions throughout a building, Graphics pages allow you to change operating conditions and help you navigate to other zones or pages where you can view or change the operation of building equipment.

NOTE You can only select the Graphics button while in the GEO view.

Related topics:

“Customizing graphics” on page 7

Customizing graphics Graphics can be customized to your specific needs. Common additions to Graphic pages are:

1 Input fields or simple graphical controls that set properties, such as the interactive Logistat control shown to the right.

NOTE You can modify your setpoint adjust values by clicking on the up and down arrow buttons on the Logistat.

2 A setpoint graph that can be clicked to change the setpoints.

3 Trend graphs.

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Related topics:

“Graphics pages” on page 6

4 Information from external web pages or links to external web pages.

NOTE Graphic pages are customized in Microsoft FrontPage. See the Graphics Generation section of the help files for details on modifying graphics.

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Properties pages Properties pages allow you to view and change system settings, operating parameters, and current status values. The contents of the Properties page vary:

• At the equipment level in the GEO or NET trees, the Properties page shows the current equipment status, the equipment’s operating parameters, and information about the Function Block that controls the equipment.

• At the point level in the GEO or NET trees, the Properties page shows information for the microblock that controls the point.

• At various levels in the NET tree, you also see information regarding your network, including network numbers and module driver information.

You can also change operating parameters on the Properties page if you have the appropriate privileges.

Related topics:

“To view a Properties page” on page 10

“Equipment level Properties page” on page 11

“Point level Properties page” on page 15

“Network tree Properties page” on page 19

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To view a Properties page 1 Click the item in the GEO or NET

tree that has the Properties page you want to view.

2 Click Properties at the top of the action pane.

Related topics:

“Properties pages” on page 9

“Equipment level Properties page” on page 11

“Point level Properties page” on page 15

“Network tree Properties page” on page 19

Equipment level Properties page The equipment level Properties page in the GEO and NET trees shows information about the Function Block that controls the equipment, including its current status and operating parameters. The contents of the Properties page is automatically created when the FB is created in Eikon for WebCTRL.

NOTE If you attempt to view the Properties page for a device or a point and WebCTRL displays a red banner message across the top of the page, the indicated problem must be resolved before you will be able to communicate and obtain Properties page information from the device.

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When you view the Properties page for a piece of equipment, only the heading and section titles are visible. The rest of the page is collapsed.

NOTE The section titles and collapsible menus are created using Text microblocks in Eikon for WebCTRL. See the Eikon for WebCTRL section of the help files for more information.

The equipment’s heading includes:

Program The equipment’s display name with its reference name in parenthesis.

Type The name of the Equipment Definition that controls the equipment.

Instance The occurrence of the equipment definition within the module.

Device The module that controls the piece of equipment. Clicking on this field links you to the Device on the NET tree.

Address The address of the device on the designated network.

Equipment status The current state of the equipment that will correspond to the color generated by the equipment definition.

Last Parameter Change The date and time of the last parameter change in the equipment.

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Related topics:

“Properties pages” on page 9

Click the plus sign (+) to expand a section, then view its parameters. Different fields are editable depending on the roles and privileges of the operator currently logged in. Editable fields are:

1 recessed boxes, underscored fields, and drop-down boxes.

You must click Accept after making any changes.

NOTE The privileges required to edit parameters are set in Eikon for WebCTRL.

2 Status information, such as the Address, is indicated by bold text without an underline. Status information cannot be edited.

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“To view a Properties page” on page 10

“Point level Properties page” on page 15

“Network tree Properties page” on page 19

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Point level Properties page The point level Properties page in the GEO and NET trees displays information about the microblock controlling the point.

NOTE If you attempt to view the Properties page for a device or a point and WebCTRL displays a red banner message across the top of the page, the indicated problem must be resolved before you will be able to communicate and obtain Properties page information from the device.

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Different fields are editable depending on the roles and privileges of the operator. Editable fields are:

1 recessed boxes, underscored fields, and drop-down boxes.

You must click Accept after making changes.

NOTE The privileges required to edit parameters are set in Eikon for WebCTRL.

2 Status information, such as the outside air temperature, is indicated by bold text without an underline. Status information cannot be edited.

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Related topics:

“Properties pages” on page 9

Clicking the Details tab reveals more status information and editable fields.

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“To view a Properties page” on page 10

“Equipment level Properties page” on page 11

“Network tree Properties page” on page 19

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Network tree Properties page The Properties pages in the NET tree provide information about your network. For example, you can identify site information, determine what equipment is attached to the various devices, or what module drivers are being used.

1 At the site level Properties page, you can set the time zone and determine whether TimeSync will be used.

NOTE You cannot edit the Uses Daylight Savings check box, but you can see whether the system uses daylight saving time, as set on its System Settings page.

2 At network level Properties page, you can view the selected network’s number and media type, and view or edit the connection type.

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3 The Properties page for a device provides general status information on the device including the reference name and address.

NOTE If you attempt to view the Properties page for a device or a point and WebCTRL displays a red banner message across the top of the page, the indicated problem must be resolved before you will be able to communicate and obtain Properties page information from the device.

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NOTE Certain fields on the NET tree’s Properties pages may be editable depending on the privilege sets of the operator logged in. Other fields provide status information only.

For additional information included on the NET tree’s Properties pages, see the Technical Instructions for the devices.

4 The driver Properties pages vary depending on the type of device you are viewing. However, you can access parameters associated with features such as calendars, default algorithms, and custom translation tables.

TIP You can navigate directly to specific sections of the driver by clicking the appropriate section under the driver in the NET tree.

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Related topics:

“Properties pages” on page 9

“To view a Properties page” on page 10

“Equipment level Properties page” on page 11

“Point level Properties page” on page 15

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Downloading When you make changes to a system, you must download them to the module before they take effect. On a Properties page, clicking Accept writes the changes to the module. If communication fails, the device is marked for download. You can then download later when communication has been reestablished. On the Download page, you can manually mark items for download, execute a download, or check to see if an item is marked for download. You must have the Download Device privilege to execute a download.

NOTE You can also perform memory downloads on the equipment’s Properties page.

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To mark a device for download:

• Add the device to the Download Items list on the Download page.

• Make a schedule change in WebCTRL that requires a device schedules download. (WebCTRL prompts you to execute the download when you make the change. If you choose not to download at that time, WebCTRL adds the device to the Download Items list on the Download page and marks it for a Schedules download.)

• Or, make a change in SiteBuilder:

• Add a new device.

• Add a new piece of equipment.

• Change the device’s driver.

• Attach or detach a piece of equipment.

• Modify the definition for a piece of equipment.

• Set the object instance for a piece of equipment.

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A device is marked as failed if WebCTRL attempted a download to the device but the download did not complete. If this happens, the device is placed in the Failures list on the Download page. You should resolve the problem that caused the download failure and execute the download again. A successful download to the device removes the item from the failures list.

CAUTION Delete an item from the Download Items and Failures list only if you manually added that item to the Download Items list. If you delete an item that was not manually added, the device may not be synchronized with the database.

Related topics:

“Types of downloads” on page 26

“Downloading parameters and schedules” on page 27

“To download memory, parameters, schedules, or BBMDs” on page 28

“To use parameter uploads and downloads” on page 33

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Types of downloads In a WebCTRL system, you can select the equipment that needs to be downloaded and the type of download. WebCTRL can download schedules, parameters, BBMDs (BACnet Broadcast Management Devices), or memory.

Related topics:

“Downloading” on page 23

“Downloading parameters and schedules” on page 27

“To download memory, parameters, schedules, or BBMDs” on page 28

“To use parameter uploads and downloads” on page 33

Enabling... will cause...the Memory download check box on the Download page • All FBs for all equipment controlled by the module will be downloaded to the

module and will overwrite all FBs currently in the module.

• The module driver will be downloaded and will overwrite the one currently in the module.

• All schedules associated with the FBs in the module will be downloaded and will overwrite all schedules currently in the module.

• All parameters associated with the FBs in the module will be downloaded and will overwrite all parameters currently in the module.

• The time will be synchronized between WebCTRL and the device.

• The module will be restarted, causing the outputs to be de-energized and all equipment connected to these outputs and module to go to their fail status, which is typically off.

• All trended data is erased and trends are restarted. Trended data already sent to the database will not be affected.

the Parameters download check box on the Download page parameters will be downloaded and all parameters that are associated with the FBs in the module will be overwritten.

the Schedules download check box on the Download page schedules will be downloaded and all schedules that are associated with the FBs in the module will be overwritten.

the BBMD download check box on the Download page BBMDs will be downloaded and all BBMD tables in the module will be overwritten.

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Downloading parameters and schedules If you have left the Automatically Download Schedules check box on the Schedules page enabled, new schedules or changes to existing schedules are automatically downloaded when you click the Accept button. If not, when you make changes to schedules, WebCTRL prompts you to download the changes now so that the devices and the database stay synchronized. Occasionally, however, you may need to manually download parameters and schedules on the Download page. For example, if you make changes to schedules or parameters when there is no communication with the device.

If you change a schedule and choose to download the changes immediately, WebCTRL will download the change only if no other pending memory or parameter downloads for each device are affected by the change. This prevents a potential breach of privileges where a user with scheduling privileges could instigate a download that also downloads parameters and memory.

Related topics:

“Downloading” on page 23

“Types of downloads” on page 26

“To download memory, parameters, schedules, or BBMDs” on page 28

“To use parameter uploads and downloads” on page 33

To download memory, parameters, schedules, or BBMDs 1 Click CFG.

2 Click Download.

3 Expand the Network tree on the Download Page to select the module you wish to download.

NOTE You do not need to locate the module or equipment in the Network tree if changes have been made to the system that require a download, such as a module change in SiteBuilder or a change to an FB while not communicating to the device. The affected module automatically appears in the Download Items list.

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4 Enable the check boxes for the types of downloads you need.

NOTE You can download equipment, rather than a module as shown to the right, by selecting it from the tree, but you can download only after verifying Parameters is the only check box selected.

5 Click Add.

NOTE You can identify whether the module will download memory, parameters, schedules, or BBMDs by the letters in brackets following the module in the Download Items list.

M=memoryP=parametersS=schedulesB=BBMDV=first mismatch of the versions (upload has not been attempted)U=upload failures (remains until the upload or download succeeds)

6 Select any additional modules you wish to download from the Network tree on the Download page, clicking Add each time.

7 Execute the download by clicking OK below the Download Items.

8 The Download Status indicates the progress of the download and tells you if the download was successful.

NOTE A dialog box also notifies you when the download has

Copyright © 2003 Working with Equipment Page 29completed successfully.

An error dialog box notifies you if the download failed.

To view failure details:

9 click the error, or

10 click View Debug Info.

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Related topics:

“Downloading” on page 23

11 Click Properties to refresh the screen before you retry a failed transfer or complete additional downloads.

12 A failed transfer is then indicated under Failures. To attempt a download again, you may add it to the Download Items list by clicking it on the Failures list on the Download page and repeating steps 4 through 7.

NOTE When an item is placed on the Failures list, the reason for failure is displayed at the bottom of the page.

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“Types of downloads” on page 26

“Downloading parameters and schedules” on page 27

“To use parameter uploads and downloads” on page 33

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To use parameter uploads and downloads If you view parameters in a piece of equipment and the parameters returned don’t match the parameters shown in the WebCTRL database, WebCTRL uploads the parameters from the equipment if Automatic Parameter Upload on the System Settings page is enabled. If you would like to control whether parameters are uploaded to WebCTRL or downloaded to the equipment when there is a mismatch, clear the Automatic Parameter Upload check box. WebCTRL will then display a message on the equipment’s Properties page when parameters don’t match and you can manually upload or download changes.

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1 Click Details to learn what differs between the module’s parameters and the database.

2 Click Upload to upload the module’s parameters to the database or Download to download the database’s parameters to the module.

NOTE You must have the appropriate privileges to see the Upload and Download buttons.

After the upload or download is completed successfully, the message is no longer visible.

TIP Click CFG > Download to also view the Download Items. A V next to the item indicates a first mismatch of the versions and that an upload has not been attempted. A U indicates upload failures and will remain until the upload or download succeeds.

Related topics:

“Downloading” on page 23

“Types of downloads” on page 26

“To download memory, parameters, schedules, or BBMDs” on page 28

“To use parameter uploads and downloads” on page 33

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Global Modify Use Global Modify to obtain information about a point or piece of equipment such as the Geographic or Network location, relative path, or Equipment Definition, and also to make a change to properties in multiple FBs at once.

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To obtain equipment information and relative paths using Global Modify 1 Click GEO.

2 Click the piece of equipment or point.

3 Verify Properties at the top of the action pane is selected. If not, click Properties.

4 Alt-click an item, whether a status value or an editable value.

NOTE Click the Details tab at point level to view or edit more configurable properties.

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NOTE To view the Setpoint section of the Properties page at equipment level, place your cursor anywhere in the Setpoint graph. When the cursor turns into a four-pointed arrow, Alt-click and the Setpoint section’s Properties page appears. You can Alt-click on any property to launch the Global Modify dialog box.

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Related topics:

“To change properties using Global Modify” on page 39

The Global Modify dialog box displays any tree-related information. The items listed will vary depending where you are in the tree.

In this dialog box you can:

5 Click GEO or NET to change your view when trying to locate equipment.

6 Click Show Advanced to display geographic and network path information. Once clicked, you can also click on any of the underlined text to navigate to that item or location.

7 Copy the Expression to your computer’s clipboard to be used in graphics or Enhanced Reports.

8 Find similar pieces of equipment or points by clicking Find All.

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To change properties using Global Modify You can find all similar points or pieces of equipment by clicking the Find All button on the Global Modify dialog box. See “Global Modify” on page 35 to learn how to open the Global Modify dialog box. The Find All button allows you to identify any other items with the same Expression. Then you can view all related status values or globally modify any or all of the related editable tree items.

NOTE You can also use a wildcard (*) as the character of an Equipment Definition.

1 Click the tree item where you would like to begin the search.

For example, click BAC Technologies to find all items in the system with the point or piece of equipment. Or click First Floor to find all items in the first floor, as well as all areas under the first floor, with that point or piece of equipment.

2 Click Find All.

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7 Click Apply Changes.

Related topics:

“To obtain equipment information and relative paths using Global Modify” on page 36

In the example to the right, multiple occurrences of the Expression setpt/setpoints/occupied_heating.value were found in the system.

3 By default, all items in the list are enabled for a change in value. To change the value of only one item, clear the other items’ Enable check boxes. Then type the item’s new value in its New Value field.

4 Type a value in the Set All To field or Change All By field. Set All To is used to change all values to a set value. Change All By is used to change all values by an increment.

5 Click Set All To to apply the set value.

6 Or, click Change All By to apply the increment.

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To view a Logic page A Logic page displays the actual Equipment Definition or FB controlling the equipment as it was created in Eikon for WebCTRL. The sequence of control and status values provide an excellent troubleshooting tool for your equipment.

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1 Click the equipment you want to view the Logic page for in the Geographic or Network tree.

2 Click Logic at the top of the action pane.

3 The present value or status of each microblock is shown to the right of each microblock in yellow.

Status values are updated automatically every four seconds by WebCTRL, or you can click the Logic button again to refresh the values manually.

The Page Up, Page Down, and arrow keys on your keyboard can be used to scroll through the GFB after clicking once in the action pane.

NOTE You can view more information and make edits by clicking a microblock and viewing its logic popup.

Related topics:

“Logic pop-ups” on page 43

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Logic pop-ups On an equipment’s Logic page you can click a microblock to display an interactive Logic pop-up where you can:

• view current property status and conditions such as alarm status

• configure hardware and software settings for that microblock

• edit properties and view the dynamic responses of a microblock and the underlying Logic page

• perform a Global Modify by Alt-clicking on the property field

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1 Click the microblock on the equipment’s Logic page.

There are three interactive Logic pop-ups that may be associated with a microblock:

2 The Properties pop-up displays basic status and properties for that microblock. Every microblock has its own unique Properties pop-up.

If there is a Details tab on the Properties pop-up, click it to view and configure detailed properties for that microblock.

3 The Events pop-up allows you to monitor or configure events for that microblock. Only microblocks with events associated with them will have an Events pop-up.

4 The Trends pop-up allows you to configure trends and the trend graph for that microblock. Only microblocks containing trends will have a Trends pop-up.

Related topics:

“To view a Logic page” on page 41

“Properties pop-up” on page 45

“Events pop-up” on page 46

“Trends pop-up” on page 47

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Properties pop-up The Properties pop-up displays status and properties for the microblock. Every microblock has its own unique Properties pop-up.

Click the Details tab to view and edit detailed properties for the microblock.

Click the print, help, or maximize/restore buttons to assist you.

Related topics:

“To view a Logic page” on page 41

“Logic pop-ups” on page 43

“Events pop-up” on page 46

“Trends pop-up” on page 47

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Events pop-up The Events pop-up allows you to monitor or configure events for that microblock. Only microblocks with events associated with them will have an Events pop-up.

See Configuring a point’s Events page in the Events section of the help files for details on the Enable and Status check boxes.

Click the print, help, or maximize/restore buttons to assist you.

Related topics:

“To view a Logic page” on page 41

“Logic pop-ups” on page 43

“Properties pop-up” on page 45

“Trends pop-up” on page 47

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Trends pop-up The Trends pop-up allows you to configure trends for that microblock. Only microblocks containing trends will have a trends pop-up.

See To configure Trends in the Trends section of the help files for more information on trends.

Click the print, help, or maximize/restore buttons to assist you.

Related topics:

“To view a Logic page” on page 41

“Logic pop-ups” on page 43

“Properties pop-up” on page 45

“Events pop-up” on page 46

Setpoints A setpoint is the temperature you want your equipment to maintain. Setpoint programming is usually added to Function Blocks (FBs) that are associated with zones. Separate setpoints are configured for heating and cooling to create a range of desired temperatures. These setpoints may be adjusted on an equipment level Properties page or on a Graphics page in WebCTRL if you are logged in with the appropriate privileges.

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3 Hysteresis is another reason that the color displayed on the FB status may be different than the values set in the setpoint graph. Once an output is on, hysteresis is the amount by which the input value must return into the Off position before the microblock’s output is turned off. Hysteresis can prevent the microblock from changing its

1 The setpoint graph shows setpoints based upon occupancy and demand levels.

The bottom bar always shows the Unoccupied setpoints and the bar directly above it shows the Occupied setpoints. Demand control bars may be visible if the setpoint microblock used in the FB includes demand control. For example, there would be three additional top bars as shown in the graph to the right. See “Demand control” on page 54 for details.

2 The colors used in the zone setpoints graph are the same as those used to display FB statuses on graphics. The FB’s setpoints are displayed as they are configured on the Properties page. However, this may be different from the effective setpoint graph. For example, the heating and cooling setpoints for a zone may be 70 and 74 degrees. Assume you have allowed the user in the zone to have +/- 2 degrees of flexibility by sliding the setpoint adjust on the Logistat. The setpoint adjust has been adjusted all the way to the left, so the effective setpoints are actually 68 and 72 degrees.

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value too frequently when the input oscillates around the trip point. For example, if the trip point for the first stage of cooling is 74 degrees and the hysteresis is 1, then once the FB has entered into the first stage of cooling, the temperature must fall to 73 degrees before the first stage of cooling turns off.

Related topics:

“To change a setpoint” on page 51

“Demand control” on page 54

“Optimal start” on page 57

“Learning adaptive optimal start” on page 60

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To change a setpoint NOTE You must be logged in to WebCTRL with the Edit Setpoint Parameters privilege to perform this procedure.

Setpoints can be edited from several locations. To change setpoints from the Properties page:

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TIP You can shift all Occupied setpoints on the graph simultaneously by dragging the green band.

1 Click the tree item in the Geographic or Network tree that has the setpoint you want to change.

2 Verify Properties is selected at the top of the action pane. If not, click Properties.

You may have to expand sections of the Properties page to make the graph visible. The graph is typically found in the section labelled Zone Control.

3 Place the cursor on the setpoint intersection you wish to change in the graph. Placing the cursor at the intersection of two colors provides the heating or cooling setpoint there. (Placing the cursor in a green or gray band shows both the heating and cooling setpoints.)

When the cursor changes to a pointing hand, click and hold the left mouse button. Then slide the setpoint to the new value. Release the mouse button when you reach the desired setpoint value.

4 After you have clicked the setpoint you want to change on the setpoint graph, you can also adjust it by clicking and typing in the desired value in the top right corner of the setpoint graph.

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5 Click Accept to have changes downloaded to the system.

Related topics:

“Setpoints” on page 48

“Demand control” on page 54

“Optimal start” on page 57

“Learning adaptive optimal start” on page 60

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Demand control Certain zone setpoint microblocks have a built-in demand control strategy that allows the user to conserve energy by relaxing setpoints, rather than shutting down equipment, as the demand level rises in a building. You define the amount the setpoints are adjusted based upon the demand level in Eikon for WebCTRL.

You can configure certain aspects of demand control for an area in the Demand Level Parameters section of the Properties page for the equipment that is heating or cooling that area.

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1 Click the equipment in the Geographic tree that has the zone setpoint microblock.

2 Verify that Properties at the top of the action pane is selected. If not, click Properties.

3 Expand the Demand Level Parameters section.

4 The Start Time and End Time columns define the time period (in hours and minutes) that you want demand control to be in effect for this area.

5 The Level columns define the amount of power, in kilowatts per hour, that the demand must exceed before WebCTRL calls for a higher demand level. (Levels are defined in the meter FB in Eikon for WebCTRL.) See “Setpoints” on page 48 to see the three demand control bars in a zone setpoint bar graph.

For example, during Period 4, set as 12:00 noon to 4:00 p.m., if the demand level exceeds 800 kw/hr, WebCTRL will broadcast a demand level 1. If the demand level exceeds 1000 kw/hr, WebCTRL will broadcast a demand level 2. If the demand level exceeds 1200 kw/hr, WebCTRL will broadcast a demand level 3.

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Related topics:

“Setpoints” on page 48

“To change a setpoint” on page 51

“Optimal start” on page 57

“Learning adaptive optimal start” on page 60

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Optimal start The optimal start routine in zone setpoint microblocks allow equipment to begin heating or cooling a zone before occupancy begins. Zone temperatures can then reach the ideal comfort range at the time occupancy begins. Optimal start works by calculating setpoints during the unoccupied periods that are gradually adjusted toward the occupied setpoints.

In WebCTRL you can adjust values that were configured in one of the zone setpoint microblocks in Eikon for WebCTRL.

See “To change a setpoint” on page 51 to learn how to access the setpoint graphs.

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4 The Zone Setpoint with Learning Adaptive Optimal Start microblocks can use the adjusted heating and cooling capacities to calculate current setpoints automatically.

1 Heating Capacity and Cooling Capacity The maximum rate (in degrees F/hr) that the zone temperature could be changed by heating or cooling if the outside temperature were 65 degrees Fahrenheit.

For example, if the equipment was stronger, or the area smaller, than was originally thought when this value was set in Eikon for WebCTRL, the heating or cooling capacity might be higher.

2 Heating Design Temp and Cooling Design Temp The most extreme outside winter and summer temperatures at which the equipment must run 100% of the time to maintain the zone temperature at a comfortable level.

Design temps are based on the geographic location of the building and are determined by ASHRAE.

3 Hysteresis The amount by which the input value must fall below trip point before the microblock’s output is turned off. The hysteresis can prevent the microblock from changing its value too frequently when the input oscillates around the trip point. For example, if the trip point is 35 and the hysteresis is 2, the microblock’s input must fall to 33 before the output turns off.

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Related topics:

“Setpoints” on page 48

“To change a setpoint” on page 51

“Demand control” on page 54

“Learning adaptive optimal start” on page 60

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Learning adaptive optimal start If you use learning adaptive optimal start and the zone does not reach the ideal temperature range by the time occupancy begins or reaches it too soon, then the heating or cooling capacities of the equipment are automatically adjusted up or down for the next unoccupied period.

For example, the heating capacity for the zone is 5 degrees per hour. When the zone becomes occupied, the zone temperature is 1 degree below the occupied setpoint, indicating a need for additional heat. Since the zone temperature was low by 1 degree, the heating capacity will be decreased by the light blue learning adaptive optimal start value (1 degree below setpoint is in the light blue region). If the light blue learning adaptive optimal start value is 0.06 (see the LtBlue value in the example below), the heating capacity will be adjusted to 4.94 for the next optimal start period. This causes the setpoint adjustment to begin sooner in the next unoccupied period.

See “To change a setpoint” on page 51 to learn how to access the setpoint graphs.

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1 These color values are the amount of adjustment depending on the color actually achieved at the beginning of occupancy.

2 The learned cooling or heating capacity is the maximum rate (in degrees Fahrenheit/hour) that the zone temperature could be changed by heating or cooling if the outside temperature was 65 degrees Fahrenheit.

3 The actual or adjusted capacity calculates the actual heating or cooling capacity of the equipment at the current outside temperature.

4 The inhibitor can prevent Optimal Start from occurring within a certain time before becoming occupied.

5 If Learning is allowed, heating and cooling capacities can be automatically adjusted when needed.

6 The percentage of heating/cooling capacity.

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Related topics:

“Setpoints” on page 48

“To change a setpoint” on page 51

“Demand control” on page 54

“Optimal start” on page 57

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