# Arc supervision signal - Lincoln welder

**URL:** <https://tech-community.robotics.abb.com/t/arc-supervision-signal-lincoln-welder/11794>\
**Category:** RAPID Programming\
**Tags:** supervision, lincoln, signal, arc, welding\
**Created:** [February 14, 2025, 9:00am UTC](https://tech-community.robotics.abb.com/t/arc-supervision-signal-lincoln-welder/11794 "2025-02-14T09:00:49Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Daper](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@Daper](https://tech-community.robotics.abb.com/u/Daper)\
**Post date:** [February 14, 2025, 9:00am UTC](https://tech-community.robotics.abb.com/t/arc-supervision-signal-lincoln-welder/11794/1 "2025-02-14T09:00:49Z")

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Hi all,

Does anyone know which signal I could use to monitor at any time if the arc is well established ?  
I have an IRC5

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**Author:** ![Daper](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@Daper](https://tech-community.robotics.abb.com/u/Daper)\
**Post date:** [February 17, 2025, 6:54am UTC](https://tech-community.robotics.abb.com/t/arc-supervision-signal-lincoln-welder/11794/2 "2025-02-17T06:54:15Z")

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It looks like siLn1Arc\_Est does the job. Yet, it is not available in the signal list to be used for a cross connection. Anyone knows how to use this input ? (e.g. transmit it to a plc )

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**Author:** ![Daper](https://avatars.discourse-cdn.com/v4/letter/d/8491ac/32.png) [@Daper](https://tech-community.robotics.abb.com/u/Daper)\
**Post date:** [February 20, 2025, 2:33pm UTC](https://tech-community.robotics.abb.com/t/arc-supervision-signal-lincoln-welder/11794/3 "2025-02-20T14:33:24Z")

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Although it is not possible to make a cross connection in the configuration topic from robotstudio itself, adding it manually directly into the EIO file solves the problem