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This document describes the MODBUS communication driver for Canvas. This driver supports the RTU (serial) version of the MODBUS protocol.

Communication Setup: Canvas

select [Tools] → [ Editor]. Click the (blue star) icon to add a new device, then select a “Serial” [Connection Type] and a “Modbus RTU” [Device Type].Image Removed

Device Name: Give a device name. This name will be used in the tag database, accompanid by the ‘Station Name’.

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I/O Device Configuration

 

To create a new device,

click Tools > I/O Device

Editor… > click the + icon > click Serial for Connection Type > select Modbus RTU for Device Type.

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I/O Device Settings

 

Once the connection type, device name, and device type have been assigned, the

I/O Device Editor

window populates with the default settings for the selected communication protocol.

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After selecting the correct

Connection Type

and

Device Type

, match the remaining settings to the target I/O device’s communication settings.

Station

In this window, users can assign a Station Name and ID for the target I/O Device.

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See the Communication Configuration section for more information.

Communication Settings: PLC

Comm. [] [] press the [] button built Comm. portImage Removed

Communication Module

If using one of the following PLC modules to communicate with Xpanel, the card settings must be configured in CICON as shown below:

  • CM1 - CN01M

  • CM1 - CN01S

  • CM3 - SP02ERS

  • CM3 - SP02ERR

  • CM3 - SP02ERC

  • CM3-SP02ERSC

  • BPnnMxxx - U

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Note that the

CH 1

tab is for usage with RS232 connections, while the

CH 2

tab is for usage with RS485 connections. All communication parameters must match the settings chosen during the I/O device configuration in Canvas.

Once the correct parameters have been entered,

click Write

while online with the PLC to update the communication parameters.

CPU

Built-in

Communication Port

If using a built-in CPU (PLC) serial port to communicate with Xpanel, the channel settings must be configured in CICON as shown below:

This connection option is available with the following models:

  • CM1 - XP Series

  • CM1 - CP Series

  • BPnnMxxx - S

  • PLC-S

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    All communication parameters must match the settings chosen during the I/O device configuration in Canvas.

Address Notation

The following table shows the list of valid address ranges and MODBUS function codes for each address area.

Area

Symbol

Analog Tag

Digital Tag

Read

Write

Coil Status

0

 

000001 - 0299991

1

5

Input Status

1

 

100001 - 129999

2

 

Holding Register

4

400001 - 429999

 

3

6, 162

Input Register

3

300001 - 329999

 

4

 

Notes:

  1. The symbol character (0, 1, 3, or 4) must be placed in the first position of the address string. The address number follows the symbol character.

  2. The symbol character does not behave as a number. For example, 400100 and 40100 designate the same memory area (holding register 100).

  • The memory areas listed above are provided for general purposes. The actual available memory area and range of each area should be checked using the manual for the connected device. The ‘Read’/’Write’ columns show the MODBUS function codes used in this communication driver.

  • Code 16 is issued for writing double words or when the recipe write function is activated. When writing single words, code 6 is used.

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Communication Cable Wiring

XPANEL COM/CPM2 RS-232C

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XPANEL COM1 RS-422/485

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The above picture shows the RS-232C and RS-422/485 ports of the Xpanel. Refer Please refer to the manual of your device for signal descriptions.

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