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 SRVO-301 — SERVO Hand broken/HBK dsbl(Rbt:…)

Manufacturer wording — SERVO Hand broken/HBK dsbl(Rbt:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC SRVO-301 (“SERVO Hand broken/HBK dsbl(Rbt:…)”): A signal of safety hand broken is not detected when setting of HBK is disabled. First check: Change Hand broken to Enable.

Updated 2026-09-17 · LogrobotLM reference

Description

A signal of safety hand broken is not detected when setting of HBK is disabled. Setting of Hand broken is not correct

Remedy

Change Hand broken to Enable. Press reset key to clear alarm.

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 →