ABB Error 90504 — Safety Controller not synchronized
Error / Erreur🇫🇷 Safety Controller not synchronized
ABB — CATALOGUE PRODUCTION
ABB 90504 (“Safety Controller not synchronized”): Safety Controller not synchronized — ABB robot hardware event on the Safety Controller not synchronized (IRC5).
Updated 2026-08-29 · LogrobotLM reference
What it means · Ce que ça veut dire
Safety Controller not synchronized — ABB robot hardware event on the Safety Controller not synchronized (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
The safety controller for drive module arg is not synchronized with supervised mechanical units. 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 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.
- probable : - The robot has been moved while the power was off.
- - An error has occurred in the communication with the serial measurement board (SMB).
- - There is a mismatch between the calibration position parameters in the robot controller and the safety configuration.
- - Perform a new synchronization of the safety controller.
Frequently asked · Questions fréquentes
- What does ABB error 90504 mean?
- ABB 90504 (“Safety Controller not synchronized”): Safety Controller not synchronized — ABB robot hardware event on the Safety Controller 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 90504?
- Inspect the Safety Controller 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
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →