LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm MOTN-309 — WARN Circular speed reduced L:…

Manufacturer wording — WARN Circular speed reduced L:%d^5
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC MOTN-309 (“WARN Circular speed reduced L:…”): Circular speed is reduced be of robot contraint First check: Reduce program speed not to display.

Updated 2026-09-17 · LogrobotLM reference

Description

Circular speed is reduced be of robot contraint

Remedy

Reduce program speed not to display.

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 →