FANUC Alarm FXTL-153 — Unit invaild mapping.

Manufacturer wording — Unit(%d) invaild mapping.
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC FXTL-153 (“Unit invaild mapping.”): The unit has invalid mapping. First check: Check the hardware to make sure the mapping is correct.

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 →