ABB Error 90855 — Missing required UAS grant

What it means · Ce que ça veut dire

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

The user arg does not have the required UAS grant (arg) for the requested operation. The operation is not performed. 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 Missing required UAS grant, 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.
• Log in as another user that has the required grant, or add the grant to the existing user.

Frequently asked · Questions fréquentes

What does ABB error 90855 mean?

ABB 90855 (“Missing required UAS grant”): Missing required UAS grant — ABB robot hardware event on the Missing required UAS grant (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 90855?

Inspect the Missing required UAS grant, 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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