Establishing client state Modbus TCP connections when M172 is a server

[obscuresc]

Hi all,

I'm using the M172PDG18R.

If I using a Modbus RTU client, I can see from the M172 side that the client is correctly communicating by using the 'sysMODBUS_msg_received_RS485_1' parameter.

Is there a similar feature, or another method I can use for observing the Modbus TCP interface when the M172 is a server?

Thanks.

[Ismet_S · Accepted solution]

HI,

I don't think we have this same Modbus status variable in TCP.

However, as a:

- Client you can use the System Varaible "sysMbMTcpNodeStatus" to have information on the Modbus TCP communictaion Status.

- Server you have the Variables "sysMbSTcp_SocketServerInfo"

BR
;