LogrobotLM

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FANUC Alarm SRVO-256 — MCC control circuit abnormal (AMP)

FANUC SRVO-256 (“MCC control circuit abnormal (AMP)”): MCC control output is abnormal in the 6ch. First check: Replace the 6ch.

Updated 2026-09-17 · LogrobotLM reference

Description

MCC control output is abnormal in the 6ch. amplifier.

Remedy

Replace the 6ch. amplifier.

Related codes

SRVO-254E-STOP circuit abnormal (KA5)SRVO-255E-STOP circuit abnormal (KM2)SRVO-260SERVO Chain 1 (NTED) abnormalSRVO-261SERVO Chain 2 (NTED) 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 →