ABB Error 90503 — Safety Controller Illegal Position Value

What it means · Ce que ça veut dire

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

An illegal position value from the serial measurement board was detected by the safety controller for drive module arg and axis arg . The cause was arg . The safety controller will stop all robot movements. 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 Safety Controller Illegal Position Value, 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 The square sum of the measured positions exceeded the configured max.
• - 2 The square sum of the measured positions was below the configured minimum value.
• - 3 Too high acceleration was detected in the resolver input.
• - Check the cabling to the serial measurement board and resolvers.

Frequently asked · Questions fréquentes

What does ABB error 90503 mean?

ABB 90503 (“Safety Controller Illegal Position Value”): Safety Controller Illegal Position Value — ABB robot hardware event on the Safety Controller Illegal Position Value (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 90503?

Inspect the Safety Controller Illegal Position Value, 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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