application and setup...

Application and Setup Guide

Grid Connect Modbus/TCP Adapter CP1W-MODTCP61

Revision 3.00

This section describes the features of the CP1W-MODTCP61 Modbus TCP adapter.

1-1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21-1-1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21-1-2 Compatible PLCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Introduction

1-1Grid Connect Modbus/TCP Adapter Application and Setup Guide

1 Introduction

1-1 Introduction

The adapter allows a PLC to act as a Modbus TCP slave device. The adapter will respond to ModbusTCP commands from another master device using the Modbus TCP protocol. The following functionsare supported.• Read Coil Status• Read Input Status• Read Holding Registers• Read Input Registers• Write Single Coil• Preset Single Register• Write Multiple Coils• Preset Multiple Register

The adapter allows a PLC to act as a Modbus TC P master device. The adapter will initiate ModbusTCP commands and process responses to other slave devices using the Modbus TCP protocol.

The adapter mounts in the Option Board Slot on the front of a CP1L or CP1H PLC, and can be used inall CP1L / CP1H PLCs with an available Option Board Slot. A CP1L or CP1H PLC with 2 option boardslots can use 2 CP1W -MODTCP61 adapters, with one functioning as a Modbus TCP Master / Clientand one functioning as a Modbus TCP Slave / Server.

The adapter mounts in the Option Board Slot on the front of a CJ2M-3□ PLC. When used in a CJ2Mseries PLC, the adapter will only function as a Modbus TCP Slave / Server.

1-1-1 Features

Modbus TCP Slave/Server Mode

Modbus TCP Master/Client Mode

PLC Option Board Slot Mounting

1-2 Grid Connect Modbus/TCP Adapter Application and Setup Guide

1 Introduction

The following table provides compatibility and configuration details about PLC models that support theCP1W-MODTCP61 Unit.

1-1-2 Compatible PLCs

PLC Model Compatible Mode Details

CP1E-E NO -- Option port does not support the required proto-colCP1E-N --

CP1L-L YES Slave/Server and Master/Client Compatible on models with available option port, configure with DIP switches/CX-Programmer

CP1L-EL Configure with CX-Programmer

CP1L-EM

CP1L-M Configure with DIP switches/CX-Programmer

CP1H-Y

CP1H-X

CJ2M-3□ Slave/Server Option port does not support the required proto-col for Master/Client mode


1 Introduction


This section describes the configuration details of the CP1W-MODTCP61 Unit.

2-1 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22-1-1 PLC Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

2-2 Adapter Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82-2-1 Configuring the Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-82-2-2 Recovering a Lost IP Address Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

2-3 Operation Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92-3-1 Modbus TCP Slave/Server Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-92-3-2 Modbus TCP Master/Client Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11

2-4 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-122-4-1 Modbus TCP Slave/Server Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-122-4-2 Modbus TCP Master/Client Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

2-5 Modbus TCP Server/Slave Command Examples . . . . . . . . . . . . . . . . . . . 2-142-6 Connecting with CX-Programmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-172-7 Additional Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Operation


2 Operation

2-1 Installation

The CP1W-MODTCP61 Modbus TCP adapter mounts in an available Option Board Slot on the front ofthe CPU.

Mounting an Option BoardWhen mounting an Option Board, first remove the slot cover. Grasp the lock levers at the top andbottom of the cover at the same time to unlock the cover, and then pull the cover out. Then to mountthe Option Board, check the alignment and firmly press it in until it snaps into place.

Precautions for Correct UsePrecautions for Correct Use

Always turn OFF the power supply to the PLC before mounting or removing an Option Board.

The CP1W-MODTCP61 adapter uses the Toolbus protocol when in the Modbus TCP Slave/Servermode and the Serial Gateway protocol w hen in the Modbus TCP Master/Client Mode. Switch settingsand/or PLC port settings must be a djusted based on the mode selected. More details on operatingmode can be found in 2-3 Operation Modes.

Precautions for Safe Use

Always turn OFF the pow er supply to the PLC bef ore attempting to set the DIP switches. Notturning OFF the power supply may result in malfunction or electric shock.


Always turn OFF the power supply to the PLC before mounting or removing the CP1W-MODTCP61 unit.

2-1-1 PLC Setup


2 Operation

The CP1W-MODTCP61 adapter uses the Toolbus protocol when operating in the Slave / Server mode.PLC settings are shown below to configure the Option Board Slot.

CP1L-L PLCs with one option board slotSwitch ON DIP switch 4 to select Peripheral Bus (Toolbus) protocol.

CP1L-M, CP1H PLCs with two option board slots

Modbus TCP Slave/Server PLC Setup

Switch No. Setting Description Application Default

4 ON Used for peripheral bus (Toolbus).

Used to enable a Serial Communications Option Board mounted in Option Board Slot 1 to be used by the peripheral bus.

OFF

OFF According to PLC Setup.


2 Operation

CP1L-EL/EM PLCs with no DIP switchesUse the following CX -Programmer settings to configure the Option Board slot fo r Peripheral Bus(Toolbus) usage. Transfer these settings to the PLC and cycle power to apply the changes.• Custom Port Settings• Baud 115200• Format 7,2,E• Mode Toolbus




OFF




OFF



2 Operation

CJ2M-CPU3□ Option Board SettingSwitch ON DIP switch 5 to select Peripheral Bus (Toolbus) protocol.




OFF



2 Operation

The CP1W-MODTCP61 adapter uses the Serial Gateway function of the PLC when operating in theMaster / Client mode. DIP switch settings and CX-Programmer port settings are shown below toconfigure the Option Board Slot. This mode is not selectable for use with the CJ2-series PLC.

CP1L-L PLCs with one option board slotSwitch OFF DIP switch 4 to allow user setup with CX-Programmer.

CP1L-M, CP1H PLCs with two option board slotsSwitch OFF DIP switch 5 to allow user setup with CX-Programmer.

CP1L-EL/EM PLCs with no DIP switchesUse the CX-Programmer Port settings below to configure the CP1L-EL/EM CPU.

Modbus TCP Master/Client PLC Setup


2 Operation

CX-Programmer Port SettingsUse CX-Programmer to change and download the following Serial Port communication settings forthe PLC port that the CP1-MODTCP61 is mounted in.• 115200 Baud Rate• 8,1,N Format• Serial Gateway Mode

• 20 Response Timeout (20*100 ms = 2.0 seconds)*1

Note 1 Setting the Response Timeout value for 2.0 seconds will opt imize communications recov-ery when a timeout occurs.

To maximize the throughput of the CP1W-MODTCP61, the amount of time per PLC scan that isallowed for servicing communications ports should be increased. This setting applies for bothSlave/Server and Master/Client modes and is accessed through the PLC Settings in CX-Program-mer. On the Peripheral Service tab, uncheck the ‘default’ option, and enter 50 (5.0 ms). Transferthese settings to the PLC and cycle power to apply the changes.

Peripheral Service


2 Operation

2-2 Adapter Setup

The CP1W-MODTCP61 is assigned a default IP address of 192.168.250.11. The IP address can bechanged using a web browser and the default IP address of the adapter. A static IP address must beassigned to the PC’s Ethernet card for this purpose. Simply enter the IP address of the adapter in theweb browsers address field to access the configuration page. Enter the d esired new IP ad dress(192.168.1.156 shown as an example), subnet mask, and default gateway (if applicable).

Mode SelectionSelect the operating mode of the adapter. See 2-3 Operation Modes for more information.

Clicking Apply Setting will save the changes and configure the adapter with the new settings.

If the IP address is lost or unknown, inspecting PLC memory areas can reveal the CP1W-EIP61’s cur-rent IP address setting. Data memory areas D1200 ad 1201 store the IP address in the following for-mat.• D1200 stores the first and second octets in hexadecimal• D1201 stores the third and fourth octets in hexadecimal

Example for an IP address of 192.168.1.154: D1200 = C0A8, D1201= 019A


This feature is only available when the adater is configured in Modbus TCP Slave/Server mode.When in TCP Master/Client mode:• Take note of any change to default IP Address settings and record for later recovery.• Use network protocol analyzer software to inspect any active Modbus TCP request messages

to the slaves from the Master module’s IP address.• Contact your local Omron or Grid Connect representative for assistance.

2-2-1 Configuring the Adapter

2-2-2 Recovering a Lost IP Address Setting


2 Operation

2-3 Operation Modes

The CP1W-MODTCP61 adapter can operate in Modbus TCP Slave/Server or in Modbus TCP Mas-ter/Client mode when mounted in a CP1 series PLC. When mounted in a CJ2M PLC, the adapter canonly operate in Modbus TCP Slave/Server mode.

The operating mode is selected with the web browser configuration method detailed in 2-2-1 Configur-ing the Adapter. Select Modbus TCP Slave/Server Mode or Modbus TCP Master/Client Mode and clickApply Setting to save the configuration.

When configured for Modbus TCP Slave/Server mode, the adapter functions as a slave node allowinga Modbus TCP Master/Client device to send commands to and receive responses from the adapter. AModbus Master device could be a PC with software that use the Modbus TCP protocol, as well as PLCsand other hardware devices functioning as Modbus TCP masters.

See 2-1-1 PLC Setup for more information on PLC setup and switch configuration.

The adapter supports the following Modbus function codes.

Additional Information

The adapter uses the standard Modbus/TCP port 502.

2-3-1 Modbus TCP Slave/Server Mode

Modbus Function Code Description

01 Read Coil Status

02 Read Input Status

03 Read Holding Registers

04 Read Input Registers

05 Write Single Coil

06 Preset Single Register

0F Write Multiple Coils

10 Preset Multiple Register


2 Operation

The supported Modbus function codes allow access to the PLC memory areas as shown.

Bit (Coil) Read/WriteAll supported Bit (Coil) read/write operations access the CIO memory area from CI O 1000 to CIO1199. This provides a total of 3200 coils for access from the Modbus master device. These functioncodes include:• 01, Read Coil Status• 02, Read Input Status• 05, Write Single Coil• 0F, Write Multiple Coils

Channel (Register) Read/WriteAll supported Channel (Register) read/write commands access the DM memory area from D1000 toD1199. This provides a total of 200 registers to be accessed from the Modbus master device. Thesefunction codes include:• 03, Read Holding Registers• 04, Read Input Registers• 06, Preset Single Register• 10, Preset Multiple Registers

When addressing the PLC memory map using the Modbus TCP protocol, D1000 is considered the firstregister and CIO 1000.00 is considered the first coil.

Channel (Register) Calculation ExampleTo determine the Modbus TCP register number for a PLC address, simply subtract 1000 from thePLC Data Memory location as shown in the examples below.

PLC Memory Area Access

Modbus Addressing

PLC Memory Location Calculation Modbus Register

D1000 (D)1000 - 1000 = 0 0

D1050 (D)1050 - 1000 = 50 50

D1099 (D)1099 - 1000 = 99 99

D1199 (D)1199 - 1000 = 199 199


2 Operation

Bit (Coil) Calculation ExampleTo determine the Modbus TCP coil for a PLC bit, subtract 1000 from the CIO Channel number, mul-tiply by 16, and add the bit number as shown in the examples below.

Modbus Function Codes have the following size limitations. Do not attempt to exceed the size limits.

When configured for Modbus TCP Master / Client mode, the adapter functions as a master device, con-trolling the communications with other slave devices such as I/ O blocks, inverters, PLCs, etc. Theadapter sends Modbus TCP commands to and receives Modbus TCP responses from the slavedevices. This mode is not selectable for use with the CJ2M-series PLC.

See 2-1-1 PLC Setup for more information on PLC setup and switch configuration.

PLC Memory Location Calculation Modbus Coil

CIO 1000.00 [ (CIO) 1000 - 1000 ]*16 + 0 = 0 0

CIO 1100.12 [ (CIO) 1100 - 1000 ]*16 + 12 = 1612 1612

CIO 1122.07 [ (CIO) 1122 - 1000 ]*16 + 7 = 1959 1959

CIO 1199.15 [ (CIO) 1199 - 1000]*16 + 15 = 3199 3199

Command Size Limitations

Modbus Function Code Read/Write Size Limit

03, 04 125 Channels (Registers)

10 123 Channels (Registers)

06 1 Channel (Register)

01, 02 998 Bits (Coils)

0F 998 Bits (Coils)

05 1 Bit (Coil)

2-3-2 Modbus TCP Master/Client Mode


2 Operation

2-4 Applications

The CP1W-MODTCP61 allows Omron CP1L , CP1H, and CJ2M-CPU3□ PLCs to function as program-mable I/O modules.

The adapter is a Mo dbus/TCP slave device, me aning the adapter cannot establish a connection toanother device. A device, such as a PC o r PLC, functioning as Modbus/TCP Master, must be thedevice used to establish the TCP connection and control the communications to the CP1W-MODTCP61.

When using the adapter in Modbus TCP Slave/Server mode, the adapter will also function as a FINSslave device, allowing the use of an NS-Series HMI and/or CX-Programmer programming software.

Up to 2 Modbus TCP Master/Client devices can communicate simultaneously with the adapter, in addi-tion to 2 FINS devices.

When using Modbus TCP clients to connect to the PLC through the CP1W-MODTCP61, the client willbe automatically disconnected after 30 seconds of inactivity to allow other clients to connect. To main-tain a TCP connection from a client, send at least 1 command at intervals of less than 30 seconds.

2-4-1 Modbus TCP Slave/Server Applications


2 Operation

The CP1W-MODTCP61 allows Omron CP1L and CP1H PLCs to function as control devices for remoteI/O slaves that use the Modbus TCP protocol. The adapter is a Modbus TCP master device, meaningthe adapter will not respond to Modbus TCP commands issued from another Modbus TCP masterdevice. The Easy Modbus function of the PLC is used to send Modbus RTU commands to the adapter,which are converted to Modbus TCP commands and delivered to the remote device. The Modbus RTUNode Number is automatically used as the last octet of the IP address of the des tination device, withthe first 3 octets of IP address of the adapter used as the first 3 octets of the destination device.

ExampleThe CP1W-MODTCP61 Adapter IP address is set as 192.168.1.25. A Modbus RTU command sentto node ‘2C’ in the PLC using Easy Modbus. The Modbus TCP command will be delivered to192.168.1.44 (44 Decimal = 2C Hex).


• Disconnected slave nodes will cause timeouts in the PLC Easy Modbus function, slowing theupdate to the remaining nodes.

• Unlike the Modbus TCP Slave/Server mode, the FINS protocol is not available when using theadapter as a Modbus TC P Master/Client. If an NS HMI is required, connect via a serial con-nection, or via a CP1W-CIF41/CP1W-ETN61/ Ethernet adapter.

2-4-2 Modbus TCP Master/Client Applications


2 Operation

2-5 Modbus TCP Server/Slave Command Examples

Objective• Read 10 Coils st arting at CIO 100 2.00 through CIO 1 002.09. PLC Dat a for CIO 10 02 =

0000000000110010 (0032 HEX)


Function Code 02 (Read Input Status) operates the same as above example.

ObjectiveRead 4 channels starting at D1050. PLC data for D1050 = 1234, D1051 = 5678, D1052 = 90AB,D1053 = CDEF

Function Code 01: Read Coil Status

Command Value Command Value

Function Code 01 Function Code 01

Starting Address Hi 00 Byte Count 02

Starting Address Lo 02 Coils 0 - 7 32

Number of Coils Hi 00 Coils 8 - 9 00

Number of Coils Lo 0A

Function Code 03: Read Holding Registers



Starting Address Hi 00 Byte Count 08

Starting Address Lo 32 Register Hi D1050 12

Number of Registers Hi 00 Register Lo D1050 34

Number of Registers Lo 04 Register Hi D1051 56

Register Lo D1051 78

Register Hi D1052 90

Register Lo D1052 AB

Register Hi D1053 CD

Register Lo D1053 EF


2 Operation


Function Code 04 (Read Input Registers) operates the same as above example.

ObjectiveTurn ON bit CIO 1040.05


To turn a bit ON, set the Output Value to FF00. To turn a bit OFF, set the Output Value to 0000.

ObjectiveWrite a value of 1467 hex to D1099.

Function Code 05: Write Single Coil



Starting Address Hi 02 Starting Address Hi 02

Starting Address Lo 85 Starting Address Lo 85

Output Value Hi FF Output Value Hi FF

Output Value Lo 00 Output Value Lo 00

Function Code 06: Wrige Single Register




Starting Address Lo 63 Starting Address Lo 63

Output Value Hi 14 Output Value Hi 14

Output Value Lo 67 Output Value Lo 67


2 Operation

ObjectiveSet the values of CIO 1045.00 through CIO 1045.11 to 011110000011 (783 hex).

ObjectiveWrite the following data into the PLC.

D1125 = FFEE

D1126 = DDAA

D1127 = BBFA

Function Code 0F: Write Multiple Coils


Function Code 0F Function Code 0F


Starting Address Lo D0 Starting Address Lo D0

Number of Coils Hi 00 Number of Coils Hi 00

Number of Coils Lo 0C Number of Coils Lo 0C

Byte Count 02

Output Value Hi 83

Output Value Lo 07

Function Code 10: Write Multiple Registers




Starting Address Lo 7D Starting Address Lo 7D

Number of Registers Hi 00 Number of Registers Hi 00

Number of Registers Lo 03 Number of Registers Lo 03

Byte Count 06

Register Value Hi (D1125) FF

Register Value Lo (D1125) EE

Register Value Hi (D1126) DD

Register Value Lo (D1126) AA

Register Value Hi (D1127) BB

Register Value Lo (D1127) FA


2 Operation

2-6 Connecting with CX-Programmer

When using the CP1W-MODTCP61 adapter while connecting with CX-Programmer to CP1L, CP1H, orCJ2M-CPU3x CPUs, specify the communications method as follows.

Network Type: Ethernet

Frame Length: 1004 Bytes

IP Address: Same as the CP1W-MODTCP61 Unit setting


2 Operation

2-7 Additional Support

If additional support is required for the application or operation of the CP1W-EIP61, use the followingresources provided below.• Your local Omron representative• www.omron247.com• www.myOMRON.com


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2. Programmable Products. Omron Companies shall not be responsible for theuser’s programming of a programmable Product, or any consequence thereof.

3. Performance Data. Data presented in Omron Company websites, catalogsand other materials is provided as a guide for the user in determining suitabil-ity and does not constitute a warranty. It may represent the result of Omron’stest conditions, and the user must correlate it to actual application require-ments. Actual performance is subject to the Omron’s Warranty and Limitationsof Liability.

4. Change in Specifications. Product specifications and accessories may bechanged at any time based on improvements and other reasons. It is our prac-tice to change part numbers when published ratings or features are changed,or when significant construction changes are made. However, some specifica-tions of the Product may be changed without any notice. When in doubt, spe-cial part numbers may be assigned to fix or establish key specifications foryour application. Please consult with your Omron’s representative at any timeto confirm actual specifications of purchased Product.

5. Errors and Omissions. Information presented by Omron Companies has beenchecked and is believed to be accurate; however, no responsibility is assumedfor clerical, typographical or proofreading errors or omissions.

OMRON CANADA, INC. • HEAD OFFICEToronto, ON, Canada • 416.286.6465 • 866.986.6766 • www.omron247.com

OMRON ELECTRONICS DE MEXICO • HEAD OFFICEMéxico DF • 52.55.59.01.43.00 • 001.800.556.6766 • [email protected]

OMRON ELECTRONICS DE MEXICO • SALES OFFICEApodaca, N.L. • 52.81.11.56.99.20 • 001.800.556.6766 • [email protected]

OMRON ELETRÔNICA DO BRASIL LTDA • HEAD OFFICESão Paulo, SP, Brasil • 55.11.2101.6300 • www.omron.com.br

OMRON ARGENTINA • SALES OFFICECono Sur • 54.11.4783.5300

OMRON CHILE • SALES OFFICESantiago • 56.9.9917.3920

OTHER OMRON LATIN AMERICA SALES54.11.4783.5300

OMRON INDUSTRIAL AUTOMATION • THE AMERICAS HEADQUARTERSSchaumburg, IL USA • 847.843.7900 • 800.556.6766 • www.omron247.com

OMRON EUROpE B.V. • Wegalaan 67-69, NL-2132 JD, Hoofddorp, The Netherlands. • Tel: +31 (0) 23 568 13 00Fax: +31 (0) 23 568 13 88 • www.industrial.omron.eu

Cat. No. SG_CP1_MODTCP 07/12 Note: Specifications are subject to change. © 2012 Omron Electronics LLC Printed in U.S.A.

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