Rockwell Automation Publication 1756-RM100F-EN-P - October 2018 77
Replacement Considerations with CompactLogix and Compact GuardLogix Systems Chapter 3
Event Task Triggers
You can use event task triggers in 5380 systems to optimize local I/O
performance and screw-to-screw times. An event task, if configured correctly,
interrupts all other tasks for the minimum amount of time that is required to
respond to the event.
You can now configure event triggers on I/O data change of state with
Compact 5000 I/O fast input modules. This option is not available with 5370
controllers because the 1769 Compact I/O modules do not support event
triggers on I/O data change of state. If the controller executes the immediate
output instruction (IOT) at the end of the event task, the output data is
transmitted immediately. The controller does not have to wait for processing at
the next RPI.
The table shows an updated comparison of event triggers with 5380 and 5370
controllers. Consult Logix 5000 Controllers Tasks, Programs, and Routines
Programming Manual, publication 1756-PM005 for considerations that can
affect the execution of an event task.
For more information on how to use event triggers with Compact 5000 I/O
fast input modules, see the 5000 Series Digital I/O Modules in Logix 5000
Control Systems User Manual, publication 5000-UM004
.
Controllers
Event task triggers supported
Module Input Data
State Change
Consumed Tag Axis Registration 1
or 2
Axis Watch Motion Group
Execution
EVENT instruction
5370 controllers XXXXX
5380 controllers XXXXXX
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