ABB Error 90474 — SC arg I/O Supply Failure

What it means · Ce que ça veut dire

SC arg I/O Supply Failure — ABB robot hardware event on the SC arg I/O Supply Failure (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

I/O supply voltage level for Safety Controller (SC) arg is out of range. 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 SC arg I/O Supply Failure, 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 : Either the voltage is out of limits or the voltage is missing.
• Connect 24V supply with correct voltage level to I/O supply terminals.
• Restart robot controller.

Frequently asked · Questions fréquentes

What does ABB error 90474 mean?

ABB 90474 (“SC arg I/O Supply Failure”): SC arg I/O Supply Failure — ABB robot hardware event on the SC arg I/O Supply Failure (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 90474?

Inspect the SC arg I/O Supply Failure, 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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