This document describes the MODBUS communication driver for Canvas. This driver supports the RTU (serial) version of the MODBUS protocol.
Communication
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Settings: Canvas
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.  |
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.  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.  |
See the Serial Communication Configuration section for more information.
Communication Settings: PLC
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:
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:
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The symbol character does not behave as a number. For example, 400100 and 40100 designate the same memory area (holding register 100).
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 |  |
XPANEL COM1 RS-422/485 |  |
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