On FANUC 0i-D and later, press the [SYSTEM] button, then the [CONDITION] soft key. This displays a live status of all overrides (MLK, DRY, SBK, AUX). Make this your default screen during setup.
The rotary dial controlling cutting feed rates (G01, G02, G03) is set below or above 100%.
In the FANUC ecosystem, "WN" stands for . When WN57 is active, the machine is telling you: "I am running, but I am purposely ignoring or scaling down the programmed feedrates or rapid speeds because a background parameter, safety switch, or PMC signal is forcing me to do so."
The FANUC WN57 override function is a valuable feature in certain FANUC control systems, particularly in CNC (Computer Numerical Control) machines. When the message "FANUC WN57 override function is active" appears, it indicates that this specific function has been engaged, allowing for adjustments to be made to the machine's operational parameters. In this article, we will explore what the FANUC WN57 override function entails, its applications, and the implications of having it active during machine operation. fanuc wn57 override function is active
Understanding the FANUC WN57 "Override Function is Active" Alarm
Ability to navigate to and modify PMC parameters safely.
After making the change, restart the machine to allow the PMC to load the new configuration. The PMC alarm should disappear upon restart. On FANUC 0i-D and later, press the [SYSTEM]
In simpler terms: The CNC is telling you, “I cannot run this cycle because someone has turned a knob (override) that I am not allowed to ignore right now.”
FANUC Robodrill α-D21MiB (31i-B control) Problem: Operator runs a warm-up program. Then turns on Dry Run to test a new engraving cycle. After testing, he edits the engraving program (Z-depth correction). He switches back to MEM and presses CYCLE START. Result: Alarm WN57 appears. Machine does nothing.
Check if manual test modes are active. Turn off the switch or softkey. If you bypassed the door interlocks using a setup key switch, turn the key back to the locked automatic mode and close the machine doors. Step 3: Verify CNC Parameters and Signals The rotary dial controlling cutting feed rates (G01,
Understanding and Troubleshooting the "FANUC WN57 Override Function is Active" Alert
Implement safety interlocks that force the machine into a safe state if the ladder program stops unexpectedly.
Did this alarm appear , or right at machine startup ?