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FANUC Alarm SPOT-353 — WARN IWC message in progress

FANUC SPOT-353 (“WARN IWC message in progress”): IWC message in progress A message cannot be sent to the IWC because a previous message transaction is still in progress. First check: This is a system programming error.

Updated 2026-09-17 · LogrobotLM reference

Description

IWC message in progress A message cannot be sent to the IWC because a previous message transaction is still in progress.

Remedy

This is a system programming error.

Related codes

SPOT-351WARN IWC driver not runningSPOT-352WARN Invalid IWC indexSPOT-354WARN Invalid IWC msg buffersSPOT-355WARN Invalid IWC function code

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 →