Rockwell Automation Logix5000 Controllers Tasks, Programs, and Routines Programming Manual - Manual (Page 62)

Chapter 2 Manage event tasks
The CPS instruction sets Produced_Tag_1 = Source_Tag_1.
The IOT instruction updates Produced_Tag_1 and sends this update to the consuming controller (station 25).
When the consuming controller receives this update, it triggers the associated event task in that controller.
Consumer controller
The controller at station 25 uses the data produced by station 24. To determine
when new data has arrived, the controller uses an event task.
Event task properties
Let an event trigger this task.
Let a consumed tag trigger the task.
Let this consumed tag trigger the task.
Ladder Diagram in the event task
When the event task runs, the CPS instruction sets Destination_Tag_1 = Consumed_Tag_1 (the values from the
producing controller). The remaining logic in this controller uses the values from Destination_Tag_1.
62 Rockwell Automation Publication 1756-PM005-EN-P - October 2014