FANUC Alarm SRVO-377 — MODE22 status abnormal
FANUC SRVO-377 (“MODE22 status abnormal”): A chain alarm was detected with the mode switch signal. First check: 1. Check the mode switch and its cable. Likely part: Panel board (Operator panel board).
Updated 2026-08-29 · LogrobotLM reference
Description
A chain alarm was detected with the mode switch signal.
Remedy · Remède
1. Check the mode switch and its cable. Replace them if a defect is found. 2. Replace the panel board.
Part to check / replace · Pièce à contrôler / remplacer
FANUC SRVO-377 points to the hardware below — start here before ordering. · SRVO-377 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 FANUC alarm SRVO-377 mean?
- FANUC SRVO-377 (“MODE22 status abnormal”): A chain alarm was detected with the mode switch signal.
- How do you troubleshoot FANUC alarm SRVO-377?
- 1. Check the mode switch and its cable. Replace them if a defect is found. 2. Replace the panel board.
- Which part is involved in FANUC SRVO-377?
- SRVO-377 points to Panel board (Operator panel board). Confirm the real cause against the robot backup before replacing a part.
Related codes / Codes liés
Same hardware involved / Même matériel en cause
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 →