FANUC Alarm MHND-241 — WARN … Illegal type
Manufacturer wording — WARN %s Illegal type
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC MHND-241 (“WARN … Illegal type”): A MACRO was called with a parameter that is illegal. First check: Check the MACRO call in the TP program.
Updated 2026-09-17 · LogrobotLM reference
Description
A MACRO was called with a parameter that is illegal. The parameter has the wrong data
Remedy
Check the MACRO call in the TP program.
Related codes
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 →