Connect to modbus accross bridge

I am trying to connect to a Modicon PLC (address 8 ) that is isolated from primary Modbus network by a bridge(address 20). I wonder if there is a way. I have tried the [device]20.8.label41137 entry, but no luck. Do you know how I can do this?

Thank you.

I’m not quite clear on what you’re trying to do.

The modbus protocol only supports specifying one slave id in the request packets; if you need another hop that then goes to ANOTHER slave id then it would need to be configured on that 2nd intermediary gateway/device.

thank you