Modbus debugging

[PEN]

Hi,

Does anyone know of a way to get a list of addresses that are accessed through a Modbus Slave Controller?

Sometimes customers can’t get the interface to work so it would be great to have a debug page with a list of used telegrams and addresses.

Regards.

[Russ C.]

If they're able to, Wireshark would be the best.

Otherwise this might be able to be done in scripting to read packets on the modbus port 502.