ABB Error 90857 — Change of Operating Mode is not allowed

What it means · Ce que ça veut dire

Change of Operating Mode is not allowed — ABB robot hardware event on the Change of Operating Mode is not allowed (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Remote change of operating mode from a PLC is not allowed. Operating mode cannot be changed from the PLC. 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 Change of Operating Mode is not allowed, 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 Remote control activation signal not activated.
• - 2 Incorrect I/O configuration.
• - 3 Operating mode is locked by the user.
• Make sure that the remote control activation signal is activated.
• Check I/O configuration.

Frequently asked · Questions fréquentes

What does ABB error 90857 mean?

ABB 90857 (“Change of Operating Mode is not allowed”): Change of Operating Mode is not allowed — ABB robot hardware event on the Change of Operating Mode is not allowed (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 90857?

Inspect the Change of Operating Mode is not allowed, 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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