If the P-Series module is a submodule of a RobotCell, the for DigitalTwin communication is set by the RobotCell ET_SystemEntity value. See example P1_1: ID ET_SystemEntity.Robot2 is set to 202, which represents the value of SERT.ET_SystemEntity.Robot2.
If a P-Series Module is not a submodule of a RobotCell, the can be selected from the drop-down list. Ensure that the is unique for the project and all modules used for DigitalTwin. You also must set the position and orientation.