FANUC Alarm IBSS-011 — STOP Master system error

Manufacturer wording — STOP Master system error(%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC IBSS-011 (“STOP Master system error”): System internal error First check: Notify FANUC

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 →