It is a common practice to have one IP Gateway device in the network and a couple of other connected via RS485. In such case, the PC with the iSMA Configurator should be connected to the same network as the Gateway device and have the IP address in the same network segment. Make sure that the RS485 configuration parameters in the Gateway device are set accordingly, so that it is possible to discover the Modbus devices connected to the bus.
To make any changes to the device it is crucial to identify it and discover the gateway devices. Discovered gateway devices appear below in the new branch with their Gateway IP address and Modbus address at the end.