FANUC Alarm ISD-052 — WARN Excessive positional error (IPS…)
Manufacturer wording — WARN Excessive positional error (IPS%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC ISD-052 (“WARN Excessive positional error (IPS…)”): A sudden change in load, inadequate air supply, malfunctioning servo-valve or poor servo tuning d an excessive error in the pneumatic servo position. First check: Verify that adequate air supply is available.
Updated 2026-09-17 · LogrobotLM reference
Description
A sudden change in load, inadequate air supply, malfunctioning servo-valve or poor servo tuning d an excessive error in the pneumatic servo position. This warning is posted when the positional error (in mm.) of that axis exceeds $IPS_CONFIG[n].$POSERR_MAX1, where n is the number specified in the alarm.
Remedy
Verify that adequate air supply is available. See if air pressure dips considerably during meter operation: this indicates that the air cylinder is starved for air.
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 →