Rockwell Automation Logix5000 Controllers Tasks, Programs, and Routines Programming Manual - Manual (Page 61)

Manage event tasks Chapter 2
Example – producer controller and consumer controller
As parts move along a production line, each station requires production
specifications for the part at its station. To make sure that a station doesn’t act on
old data, an event task signals the arrival of new data for the next part.
Producer controller
This controller controls station 24 and produces data for the next station (station
25). To signal the transmission of new data, the controller uses the following
elements:
• Produced_Tag
• Ladder logic
Produced tag properties
Produced_Tag is configured to update its event trigger through an IOT
instruction.
Ladder Logic
If New_Data = on, then this occurs for one scan.
Rockwell Automation Publication 1756-PM005-EN-P - October 2014 61