FANUC Alarm PAIN-419 — PAUS …Max.dV/dT detected
Manufacturer wording — PAUS %sMax.dV/dT detected
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PAIN-419 (“PAUS …Max.dV/dT detected”): A velocity change within a measured time has exceeded the maximum dV/dT setting for this turbine. First check: Check the hardware to determine if the feedback signal from the turbine is consistent by viewing the Bell Speed Signal Conditioner tachometer display.
Updated 2026-09-17 · LogrobotLM reference
Description
A velocity change within a measured time has exceeded the maximum dV/dT setting for this turbine.
Remedy
Check the hardware to determine if the feedback signal from the turbine is consistent by viewing the Bell Speed Signal Conditioner tachometer display. When the turbine is rotating at a constant speed, the tachometer display should also be constant.
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 →