Modbus RTU an 750-653 codesys

CODESYS
1

Hello everyone, I am new here.

I have already read some posts about the 750-653 module and have been trying for a long time to establish a connection. However, I can’t seem to find a starting point.

So far, I have a greenhouse equipped with a Codesys Control Win V3 x64 Soft PLC and a WAGO 750-354 EtherCAT coupler for I/Os. Until now, I used a USB-to-RS485 adapter to read temperature and wind sensors.

However, I would prefer to use the WAGO 750-653 module to read the sensors so that everything runs over EtherCAT.

I have already installed the WagoAppPlcModbus library, but I don’t know how to proceed from here.

Perhaps someone among you has an example of how to use the WAGO 750-653 terminal and could assist me.

Thank you very much in advance for your help.

2

Unfortunately, I believe that the function block libraries you need to use to make this convenient, WagoAppPlcModbus and WagoSysFieldbusModule, will only work with WAGO controller hardware and not with the Codesys Control Win V3 x64 Soft PLC.

To use the 750-653 module along with an EtherCAT coupler and the Windows SoftPLC, I think you will need to “manually” manage the raw process image of the 653 module using the information in the 750-653 hardware manual to handle the fragmented Tx and Rx messages. And you will need to use a CODESYS Modbus library rather than the WAGO library and manage that Modbus payload as it moves in and out of the 653 module via the 654 coupler.