Hello Jason, I try test about LevistudioU program with device (GW636). I can connect between HMI and device(GW636) when set HMI to be master (Device type:Modbus RTU slave All function) only If set HMI to be slave it can't connect. When I can connect between HMI and device(GW636) already, HMI display show "No.1 Plc Addr 4_w_000002 COMM TimeOut!"
Why it is so? Can you help me please?
I need to HMI send data to device (GW636) and read/receive data from device (GW636) show as below