Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 171
Use I/O Modules with CompactLogix 5370 L1 Controllers Chapter 7
The following table describes the triggers for an Event task available in a
CompactLogix 5370 L1 control system.
For more information on Event tasks, see the following publications:
• Logix5000™ Controllers Common Procedures Programming Manual,
publication 1756-PM001
• Using Event Tasks with Logix5000 Controllers, publication
LOGIX-WP003
Complete the following steps to configure the Event task.
1. Open the project.
2. Right-click Embedded Discrete_IO and choose Properties.
Trigger Description
Input Data State Change The input point triggers the Event task that is based on the change of state (COS)
configuration for the point. The COS configuration is set on the Module Definition
dialog box.
Consumed Tag Only one consumed tag can trigger an Event task. Use an Immediate Output (IOT)
instruction in the producing controller to signal the production of new data.
Axis Registration 1 or 2 A registration input triggers the Event task.
Axis Watch A watch position triggers the Event task.
Motion Group Execution The coarse update period for the motion group triggers the execution of the motion
planner and the Event task. Because the motion planner interrupts all other tasks, it
executes first.
EVENT Instruction Multiple EVENT instructions can trigger the same task.
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