Communication status between Momentum and two Premium PLCs


Thread Starter

eyad alim

I have a Momentum and two Premium PLCs. They communicate using Modbus Plus. I would like to know a function or something like this to get the commnucation status for each node to decide what to do in the logic in the M1 Momentum.

Thanks so much.
You can use either the MSTR Block or Modbus Plus Peer Cop to swap holding registers between the three systems. Then send the internal time clock (seconds) to one of these holding registers. If the register does not change after a while, you know the communications has failed between the two.

Also the MSTR Block does have some Modbus Plus Network diagnostics features in it.