ABB Error 71021 — Duplicate cross connection with same resultant I/O signals
Error / Erreur🇫🇷 Duplicate cross connection with same resultant I/O signals
ABB — CATALOGUE PRODUCTION
ABB 71021 (“Duplicate cross connection with same resultant I/O signals”): Duplicate cross connection with same resultant I/O signals — ABB robot hardware event on the Duplicate cross connection with same resultant I/O signals (IRC5).
Updated 2026-08-29 · LogrobotLM reference
What it means · Ce que ça veut dire
Duplicate cross connection with same resultant I/O signals — ABB robot hardware event on the Duplicate cross connection with same resultant I/O signals (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
The I/O configuration of cross connection arg is invalid. The cross connection has the same resultant I/O signal arg as cross connection arg . Having more than one cross connection that result in the setting of the same signal may cause unpredictable behaviors, as you cannot control their order of evaluation. The cross connection has been rejected, and no functions depending on it will work. 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 Duplicate cross connection with same resultant I/O signals, 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.
- Make sure that the I/O signal is not specified as the resultant of several cross connections.
Frequently asked · Questions fréquentes
- What does ABB error 71021 mean?
- ABB 71021 (“Duplicate cross connection with same resultant I/O signals”): Duplicate cross connection with same resultant I/O signals — ABB robot hardware event on the Duplicate cross connection with same resultant I/O signals (IRC5). Specific to this controller generation. Severity: Major. Field diagnosis below…
- How do you troubleshoot ABB error 71021?
- Inspect the Duplicate cross connection with same resultant I/O signals, 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 →