ABB Error 31108 — Serial link RS232 fault
Error / Erreur🇫🇷 Liaison Série RS232
CALCULATEURS, MÉMOIRE & COMMUNICATION (31xxx–33xxx)
ABB 31108 (“Serial link RS232 fault”): Serial link RS232 fault — ABB robot hardware event on the serial link RS232 (S4/S4C). Likely part: Liaison Série RS232 (serial link RS232).
Updated 2026-08-29 · LogrobotLM reference
What it means · Ce que ça veut dire
Serial link RS232 fault — ABB robot hardware event on the serial link RS232 (S4/S4C). Seen across controller generations. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
Erreur de communication de trame sur le canal série du calculateur d'E/S.
What to check · Que vérifier
- Inspect the serial link RS232, 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.
- Vérifier les paramètres de vitesse/trame.
- Remplacer la carte ordinateur du robot.
- À savoir : Équivalent à l'erreur de port série bruité (71400) sur IRC5.
Part to check / replace · Pièce à contrôler / remplacer
ABB 31108 points to the hardware below — start here before ordering. · 31108 met en cause l'organe ci-dessous : commencez par là.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering. · Touchez une pièce pour tous les codes qui la citent ; vérifiez la variante exacte avant commande.
Frequently asked · Questions fréquentes
- What does ABB error 31108 mean?
- ABB 31108 (“Serial link RS232 fault”): Serial link RS232 fault — ABB robot hardware event on the serial link RS232 (S4/S4C). Seen across controller generations. Severity: Major. Field diagnosis below (French); your robot's own manual remains authoritative.
- How do you troubleshoot ABB error 31108?
- Inspect the serial link RS232, 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.
- Which part is involved in ABB 31108?
- 31108 points to Liaison Série RS232 (serial link RS232). Confirm the real cause against the robot backup before replacing a part.
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 →