Ethernet_ModbusMaster_TCP issue

hi,
i am using Ethernet_Modbus_Master_TCP to scan through 10 Wago devices from Wago IPC. Some of Slave devices are not power on but I received "Com OK" status intermittently from those devices. Your advice on how to solve that will be greatly appreciated.


Thank in advance.

I don't know a lot about Wago but I have had this issue with other hardware.

What we did was to use a spare output at each station and wire it to a spare input at that same station. Then the Master program flashed the output on and off using a timer. Lastly, the Master program looked for the flashing input at the remote station and if it wasn't present, it considered the station offline.

Hope this helps