1. In the sensor settings, besides the sensor address, specify the bus.
In the menu Tables / Sensors .. or by selecting the Properties item in the context menu of the sensor, go to the Interface tab In the Address section of the Bus
window, specify the bus number
The bus number can be specified in the Sensor monitor table accessible from the Control menu.
In principle, this is sufficient for the operation of RailCom in Rocrail.
If you install a locomotive on the rails, then it is detected by the program itself as a guest.
If you need to configure existing locomotives in the database, you need to register in their properties Code @
In systems using LocoNet it is equal to the address, but it can also be specified in the Sensor monitor table accessible from the Control menu.