FANUC Alarm ISD-012 — WARN ISD servo not ready (ISD…)
Manufacturer wording — WARN ISD servo not ready (ISD%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC ISD-012 (“WARN ISD servo not ready (ISD…)”): This error is posted when the ISD servo is not ready. First check: Usually, this error occurs when the servo power is turned off be of a strapped OT sensor, the machine is locked or an EMERGENCY STOP has occurred.
Updated 2026-09-17 · LogrobotLM reference
Description
This error is posted when the ISD servo is not ready.
Remedy
Usually, this error occurs when the servo power is turned off be of a strapped OT sensor, the machine is locked or an EMERGENCY STOP has occurred. Determine the and turn on the power.
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 →