Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Bedienungsanleitung PDF herunterladen (Seite 66)

Chapter 2 Manage event tasks

Ladder Diagram in Program_B

If Shut_Down_Line = on (conditions require a shut down) then

run the Shut_Down task one time.

If you want your event task to run automatically, if the trigger fails to occur within

a certain time, assign a timeout value to the task. When the event task is finished,

the timeout timer begins to increment. If the timer reaches its preset value before

the event task is triggered, the event task runs automatically.

Description

Event task runs.

Timeout time stops incrementing.

Event task is done.

Timeout timer resets and begins incrementing.

Timeout timer reaches the timeout value.

Event task automatically runs.

In the Status attribute of the TASK object, bit 1 turns on.

Define a timeout value for

an event task

66 Rockwell Automation Publication 1756-PM005-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers Tasks, Programs, and Routine Bedienungsanleitung Seite 66