# Input monitoring while the program is running

**URL:** <https://tech-community.robotics.abb.com/t/input-monitoring-while-the-program-is-running/10667>\
**Category:** IRC5\
**Created:** [March 30, 2022, 11:53pm UTC](https://tech-community.robotics.abb.com/t/input-monitoring-while-the-program-is-running/10667 "2022-03-30T23:53:24Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ollitap](https://avatars.discourse-cdn.com/v4/letter/o/71c47a/32.png) [@ollitap](https://tech-community.robotics.abb.com/u/ollitap)\
**Post date:** [March 30, 2022, 11:53pm UTC](https://tech-community.robotics.abb.com/t/input-monitoring-while-the-program-is-running/10667/1 "2022-03-30T23:53:24Z")

</div>

I have IRC5. I want to monitor inputs and set output while the robot is running its program. How do I multitask? I have a PLC that I am utilizing. I also want the robot to stop when the light curtain is broken.

---

<div class="post-metadata">

**Author:** ![lemster68](https://dub1.discourse-cdn.com/flex005/user_avatar/tech-community.robotics.abb.com/lemster68/32/1945_2.png) [@lemster68](https://tech-community.robotics.abb.com/u/lemster68)\
**Post date:** [March 31, 2022, 11:54am UTC](https://tech-community.robotics.abb.com/t/input-monitoring-while-the-program-is-running/10667/2 "2022-03-31T11:54:15Z")

</div>

There is a system output for program executing. Read the system parameter manual for that. You must have the multitasking option in order to use multitasking. A light curtain ought to be wired into the panel board auto stop circuit. It is a dual channel circuit. You can probably find that in the manual for IRC5 electrical diagrams or something like that.