ABB Error 90781 — Safe Local I/O GPIO input is unstable

What it means · Ce que ça veut dire

Safe Local I/O GPIO input is unstable — ABB robot hardware event on the Safe Local I/O GPIO input is unstable (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

arg SNC: GPIO input arg is unstable. This is a warning only. Le texte constructeur de ce code n'existe qu'en anglais dans les manuels ABB dont il provient. Il est reproduit tel quel ci-dessus ; le manuel de votre robot fait foi.

What to check · Que vérifier

• Inspect the Safe Local I/O GPIO input is unstable, its wiring and connections first.
• Match this code against your robot's event-log timeline before swapping parts.
• Follow the French field checks below — they are the tested sequence for this fault.
• probable : - 1 Cable fault.
• - 2 Signaling error.
• Check cables to the Safety Controller.
• Verify that the indicated signal to the Safety Controller is stable.

Frequently asked · Questions fréquentes

What does ABB error 90781 mean?

ABB 90781 (“Safe Local I/O GPIO input is unstable”): Safe Local I/O GPIO input is unstable — ABB robot hardware event on the Safe Local I/O GPIO input is unstable (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

How do you troubleshoot ABB error 90781?

Inspect the Safe Local I/O GPIO input is unstable, its wiring and connections first. Match this code against your robot's event-log timeline before swapping parts. Follow the French field checks below — they are the tested sequence for this fault.

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