Hi all I have connection problem with V350 PLC (slave) to Kepware OPC using modbus TCP/IP.
some background :
1. the plc holding register is MI201 (the address we maintain is 400202, data type: short ).
2.all other values that was needed to create the tag was maintained as default values .
3. I have checked there is a ping from my machine to the plc .
4.when I running the QC in the OPC the tag quality is" BAD" and the value is "unavailable".
what you supposed my next step should be to solve this issue and read the value ?