ABB Error 20451 — SC arg Not Synchronized

What it means · Ce que ça veut dire

SC arg Not Synchronized — ABB robot hardware event on the SC arg Not Synchronized (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Safety Controller (SC) arg is not synchronized with supervised mechanical units. Synchronization of mechanical units supervised by the safety controller is required to continue normal operation of the system. 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 Not Synchronized, 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.
• Move all mechanical units supervised by Safety Controller arg to the synchronization positions defined in the safety configuration.

Frequently asked · Questions fréquentes

What does ABB error 20451 mean?

ABB 20451 (“SC arg Not Synchronized”): SC arg Not Synchronized — ABB robot hardware event on the SC arg Not Synchronized (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 20451?

Inspect the SC arg Not Synchronized, 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.

Related codes / Codes liés