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Sample Compactlogix program for Modbus comms
Modbus Communication with Compact Logix PLC with in-built RS-232 Port

I have a Compactlogix and a Digi one IAP. I am trying to read and write a few words and bits to and from a generator and an HVAC unit. Both have Modbus.

Does anyone have a sample Compactlogix program I can start with?

Found one at Rockwell but I can't get it to open.

Thanks