FANUC Alarm APSH-003 — WARN … Illegal zone number

Manufacturer wording — WARN %s Illegal zone number
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC APSH-003 (“WARN … Illegal zone number”): An zone number less that 1 or greater than $IZONEIO.$NO_ZONES was used. First check: Use an event number from 1 to $IZONEIO.$NO_ZONES.

Updated 2026-09-17 · LogrobotLM reference

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 →