Omron SYSMAC CS Series Operation Manual page 181

Configuring the Slave Devices
Example
160
Assigning slave devices to groups is application dependent. The figure below
shows the Group selection tab for the CJ1W-PRT21, which has been
assigned to groups 1, 2 and 4.
After making the group assignment, press the OK button to save the changes
and close the DTM Configuration User Interface.
Section 6-3