LogrobotLM

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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 2026-08-29 · LogrobotLM reference

Description

Servo system failed to acknowledge servo parameter update.

Remedy · Remède

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

Frequently asked · Questions fréquentes

What does FANUC alarm MOTN-402 mean?
FANUC MOTN-402 (“HSCD: Update Servo Timeout”): Servo system failed to acknowledge servo parameter update.
How do you troubleshoot FANUC alarm MOTN-402?
Check that communication between servo and host is OK. HSCD does not support tabletop controller.

Related codes / Codes liés

MOTN-400STOP No Coll. Guard Reg. DefinedMOTN-401STOP Coll. Guard Reg. Data ErrorMOTN-403Updating Servo (%s)MOTN-404Group %d^1 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. · 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 →