Communication Error Between WAGO 750-852 PLC and WAGO-I/O-PRO (CODESYS 2.3)

[Mehak_Fatima]

Hi everyone,

I need some help with communication between a WAGO 750-852 PLC and WAGO-I/O-PRO (CODESYS 2.3). I am trying to connect and download the program, but I keep getting a communication error.

To troubleshoot, I already tried:

• Removing all I/O modules

• Downloading an empty program to the PLC

However, the issue still persists.

Has anyone faced a similar problem or can guide me on what to check next?

I have attached screenshots for reference. Any help would be greatly appreciated.

[WagoIcard]

The Error 3.0 mean the communication with the local bus (The IO cards) is not possible.
Try another card and the 600.
Could be a bad connection on the internal bus, a bad card or a dead coupler