You start the associated CIMPLICITY project before you start the Modbus RTU Slave Interface.
Load the project from the CIMPLICITY Workbench application.
Select Run from the Workbench Project pull-down menu, or
Click the Run button on the Workbench toolbar.
Check the list of started resident processes for the name MRTUSI_RP.
Types of Modbus RTU Slave configuration records.
Modbus RTU Slave getting started steps.