Hello,

pls attach also cfg of Modbus PC SW as speed , parity, ... I recommend also connect as Slave your PC Modbus SW and check there incomming PLC message. What exactly CM module you're use (order number)? Check also some topics here about use of 2 stop bits, something tells me that some problems was also discovered before with that settings, in other case you can try set 1 stop bit on relay communication settings and also on CM module, then make tests. Other hint to mentioned STATUS is check time limit, what you have set here? Is time limit big enough to read completelly data from Slave?