Hello dear members and Siemens Team!

I hope you are doing well!

Here is a issue with communication Modbus PLC and DCS (Honeywell).

PLC is a slave. We have several errors on communication.

Then we check module information in hardware PLC in Step7. And found that there are same 9 errors with Event ID: 16#F1C8:0E56. 

In detail on Event:

IF 1: MODBUS - Receive error

Master: Echo incorrect: Data of response frame mirrored by slave (bit number, etc.) is not the same as the data sent in the request frame.

Slave: An operation of the coupling is not possible because the communication FB is not running. Incoming event.

Thanks in advance!