FANUC Alarm THSR-027 — STOP Preplan is not allowed
FANUC THSR-027 (“STOP Preplan is not allowed”): No preplan motion inside search start. First check: It is normal to issue an stop error when preplan is on within search start
Updated 2026-09-17 · LogrobotLM reference
Description
No preplan motion inside search start.
Remedy
It is normal to issue an stop error when preplan is on within search start
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 →