LogrobotLM

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 PNT2-631 — Failed to reach setpoint

Manufacturer wording — %sFailed to reach setpoint
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC PNT2-631 (“Failed to reach setpoint”): This is caused by a failure of the AccuAir system to reach the setpoint (within the tolerance band) within the time allowed. First check: If the Fan Air control I/P transducer is noisy or broken change it.

Updated 2026-09-17 · LogrobotLM reference

Description

This is caused by a failure of the AccuAir system to reach the setpoint (within the tolerance band) within the time allowed. The time that the system is allowed to take to reach setpoint is controlled by the Min. Setpoint reached (ms) parameter. This might be caused by a sticking transducer, a system that is too slow for the current setting of Min. Setpoint reached or a system yield that is too large for the tolerance band setting.

Remedy

If the Fan Air control I/P transducer is noisy or broken change it. If the calibration yield values are more than half of the min. Tolerance band then increase this tolerance value. If the Flow delay parameter is large or this alarm is occurring on many robots then increase the Minimum setpoint reached parameter.

Related codes

PNT2-627Flow setpoint below globalsPNT2-628Requested flow above cal. tablePNT2-6320 air flow rate timeoutPNT2-633Warning, learn item failed

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 →