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FANUC Alarm SRVO-203 — SVON input(SVEMG abnormal)

FANUC SRVO-203 (“SVON input(SVEMG abnormal)”): The SVON signal line was opened while the SVEMG wiring is incorrect. First check: Correct any SVEMG wiring errors.

Updated 2026-09-17 · LogrobotLM reference

Description

The SVON signal line was opened while the SVEMG wiring is incorrect.

Remedy

Correct any SVEMG wiring errors. Input an SVON signal, and turn the power off and then on again. Refer to the maintenance manual for details.

Related codes

SRVO-201SERVO Panel E-stop or SVEMG abnormalSRVO-202SERVO TP E-stop or SVEMG abnormalSRVO-204SYSTEM External(SVEMG abnormal) E-stopSRVO-205SYSTEM Fence open(SVEMG abnormal)

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. How this reference is built →