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 SRVO-250 — SERVO SVEMG/MAINON1 abnormal

FANUC SRVO-250 (“SERVO SVEMG/MAINON1 abnormal”): Status of MAINON1 signal is still OFF even if SVEMG is ON It is abnormal of E.STOP First check: Repair the circuit of E.Stop hardware Power off/on again

Updated 2026-08-29 · LogrobotLM reference

Description

Status of MAINON1 signal is still OFF even if SVEMG is ON It is abnormal of E.STOP

Remedy · Remède

Repair the circuit of E.Stop hardware Power off/on again

Frequently asked · Questions fréquentes

What does FANUC alarm SRVO-250 mean?
FANUC SRVO-250 (“SERVO SVEMG/MAINON1 abnormal”): Status of MAINON1 signal is still OFF even if SVEMG is ON It is abnormal of E.STOP
How do you troubleshoot FANUC alarm SRVO-250?
Repair the circuit of E.Stop hardware Power off/on again

Related codes / Codes liés

SRVO-247Chain 2 abnormal(EX_robot)SRVO-248Deadman switch status abnormalSRVO-251DB relay abnormal(G:%d A:%d)SRVO-252Current detect abnl(G:%d A:%d)

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 →