FANUC Alarm MOTN-121 — WARN Invalid config. string

Manufacturer wording — WARN Invalid config. string (G:%d^2)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC MOTN-121 (“WARN Invalid config. string”): Invalid config string First check: Reteach your config string

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 →