FANUC Alarm PNT1-687 — Estat controller fault

Manufacturer wording — %sEstat controller fault
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC PNT1-687 (“Estat controller fault”): The external E-stat controller detected a fault. First check: Check the status of the external E-stat controller.

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 →