ABB Error 40256 — Parameter error

What it means · Ce que ça veut dire

Parameter error — ABB robot hardware event on the Parameter error (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Task arg : 'alt' must not be set for first optional parameter arg in alternatives list 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 Parameter error, 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.
• Make sure that only the second and following in each list of excluding optional parameters are marked as alternatives.

Frequently asked · Questions fréquentes

What does ABB error 40256 mean?

ABB 40256 (“Parameter error”): Parameter error — ABB robot hardware event on the Parameter error (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 40256?

Inspect the Parameter error, 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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