LogrobotLM

LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm SPOT-359 — WARN Invalid buffer, IWC msg recv

FANUC SPOT-359 (“WARN Invalid buffer, IWC msg recv”): Invalid buffer, IWC msg recv An invalid buffer tag was detected on a message segment received from the IWC board. First check: Notify Product Development.

Updated 2026-09-17 · LogrobotLM reference

Description

Invalid buffer, IWC msg recv An invalid buffer tag was detected on a message segment received from the IWC board. This may indicate a problem with the board or driver software.

Remedy

Notify Product Development.

Related codes

SPOT-357WARN Invalid buffer, IWC msg sendSPOT-358WARN Checksum error, IWC msg recvSPOT-360WARN IWC buffer too smallSPOT-361WARN Ack timeout, IWC msg send

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 →