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FANUC Alarm MOTN-402 — HSCD: Update Servo Timeout

FANUC MOTN-402 (“HSCD: Update Servo Timeout”): Servo system failed to acknowledge servo parameter update. First check: Check that communication between servo and host is OK.

Updated 2026-09-17 · LogrobotLM reference

Description

Servo system failed to acknowledge servo parameter update.

Remedy

Check that communication between servo and host is OK. HSCD does not support tabletop controller.

Related codes

MOTN-400STOP No Coll. Guard Reg. DefinedMOTN-401STOP Coll. Guard Reg. Data ErrorMOTN-403Updating ServoMOTN-404Group … does not support HSCD

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 →