ABB Error 50478 — Could not deactivate lead-through

What it means · Ce que ça veut dire

Could not deactivate lead-through — ABB robot hardware event on the Could not deactivate lead-through (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.

Could not deactivate lead-through mode because one or more joints were moving. The controller goes to Motors Off. 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 Could not deactivate lead-through, 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 : One or more joints were being moved in lead-through mode when the deactivation command was sent.
• The controller will deactivate lead-through mode when the user jogs or starts a program.
• Make sure that the system is standing still when deactivating lead-through mode.

Frequently asked · Questions fréquentes

What does ABB error 50478 mean?

ABB 50478 (“Could not deactivate lead-through”): Could not deactivate lead-through — ABB robot hardware event on the Could not deactivate lead-through (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 50478?

Inspect the Could not deactivate lead-through, 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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