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FANUC Alarm ISD-055 — STOP Servo Enab o/p not assigned (IPS…)

Manufacturer wording — STOP Servo Enab o/p not assigned (IPS%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ISD-055 (“STOP Servo Enab o/p not assigned (IPS…)”): A digital output that is used to provide power to the servo valve for the specified axis number has not been assigned. First check: 1. Perform a Controlled start and display the IPS Config screen.

Updated 2026-09-17 · LogrobotLM reference

Description

A digital output that is used to provide power to the servo valve for the specified axis number has not been assigned.

Remedy

1. Perform a Controlled start and display the IPS Config screen. 2. Set up the servo enable digital output port number and type. 3. Perform a Cold Start.

Related codes

ISD-053WARN Excessive error during stop (IPS…)ISD-054WARN Excessive error during move (IPS…)ISD-056STOP Analog output not assigned (IPS…)ISD-057WARN Press. sw. inp not assigned (IPS…)

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 →