Using Modbus Operators
Coils and register broadcasters and receivers are assigned addresses to facilitate identifying each individual message to be sent or received. Connect the coil or register operator to the correct ID by right clicking on the operator and selecting Connect hardware. The dialog in Figure 9.24 appears. Type the desired ID and press OK to assign the coil or register its ID.
Figure 9.24. Connecting a Modbus Register to a Register Address