FANUC Alarm ISD-059 — STOP Servo not ready: ext. e-stop(IPS…)
Manufacturer wording — STOP Servo not ready: ext. e-stop(IPS%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC ISD-059 (“STOP Servo not ready: ext. e-stop(IPS…)”): The specified pneumatic servo is unable to reset be of an external condition such as an Emergency Stop. First check: Verify that when RESET is pressed, the digital output configured as servo enable comes on briefly.
Updated 2026-09-17 · LogrobotLM reference
Description
The specified pneumatic servo is unable to reset be of an external condition such as an Emergency Stop. This external condition is forcing the digital servo ready input to stay off.
Remedy
Verify that when RESET is pressed, the digital output configured as servo enable comes on briefly. Determine and rectify the external condition (e-stop, blown fuse) causing the problem and then press RESET again. Check whether the servo enable digital output turns on. Verify that the servo ready digital input and the servo enable digital output are properly set up and assigned. Increase the value of $IPS_SETUP.$SRDY_TMOUT (number of scans that the pneumatic servo system waits before checking the servo ready digital input, after RESET is pressed) if required.
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 →