LogrobotLM

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FANUC Alarm PNT2-178 — Failed to reach setpoint

FANUC PNT2-178 (“Failed to reach setpoint”): The Tolerance Band is too narrow (low), or the regulator is not working properly. First check: Check regulator operation and Adaptive Gain settings in the AccuStat Color Data for that color valve.

Updated 2026-09-17 · LogrobotLM reference

Description

The Tolerance Band is too narrow (low), or the regulator is not working properly. The adaptive gain for that color might be too low, and the flow rate is not adapting fast enough. The potentiometer is not operating properly. The trigger delay might not be set properly if trigger events are too close together.

Remedy

Check regulator operation and Adaptive Gain settings in the AccuStat Color Data for that color valve. Verify the trigger delays are set up properly.

Related codes

PNT2-176Calculated output > Max OutputPNT2-177Calculated output < Min OutputPNT2-179Canister Fill ErrorPNT2-180Auto Calibration Successful

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 →