LogrobotLM

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FANUC Alarm TG-004 — WARN Bad Command Value

FANUC TG-004 (“WARN Bad Command Value”): Motion trigger has been told to set a I/O port to a value which that port cannot be set to. First check: A digital port must always be set to 1 or 0.

Updated 2026-09-17 · LogrobotLM reference

Description

Motion trigger has been told to set a I/O port to a value which that port cannot be set to.

Remedy

A digital port must always be set to 1 or 0. You must set the corresponding command_value to a 1 or 0

Related codes

TG-002WARN Illegal I/O PortTG-003WARN Illegal I/O Port TypeTG-005WARN Bad Alternate ValueTG-006WARN Bad Time Before

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 →