ABB Error 50494 — Revolution counters missing

What it means · Ce que ça veut dire

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

The revolution counter is missing for at least one joint. The robot is not calibrated but can be jogged manually. Automatic operation is not possible. 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 Revolution counters missing, 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 : The revolution counter is lost due to a power down.
• Update the revolution counter with the appropriate calibration routine.

Frequently asked · Questions fréquentes

What does ABB error 50494 mean?

ABB 50494 (“Revolution counters missing”): Revolution counters missing — ABB robot hardware event on the Revolution counters missing (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 50494?

Inspect the Revolution counters missing, 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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