LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm SYST-251 — No teach plug ON input

FANUC SYST-251 (“No teach plug ON input”): This operation requires the Teach Plug ON input. First check: Check the status of the Teach Plug ON input.

Updated 2026-08-29 · LogrobotLM reference

Description

This operation requires the Teach Plug ON input.

Remedy · Remède

Check the status of the Teach Plug ON input.

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-251 mean?
FANUC SYST-251 (“No teach plug ON input”): This operation requires the Teach Plug ON input.
How do you troubleshoot FANUC alarm SYST-251?
Check the status of the Teach Plug ON input.

Related codes / Codes liés

SYST-249No system ready inputSYST-250No robot ready inputSYST-252Teach plug ON inputSYST-253No safe stop input

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 →