Fanuc Wn57 Override Function Is Active

FANUC WN57 Override Function — Complete Write-up

Overview

WN57 on FANUC CNC controls indicates that the machine is running with an active feed override or rapid override function tied to a safety or watchdog feature that modulates axis motion. It’s commonly seen as a displayed override status (often in the MPG/MDI or alarm/message area) when the control has detected a condition where commanded motion has been limited or overridden by the system. The exact behavior and causes vary by FANUC series and machine OEM implementation.

A technician may have left the signal override active after checking the electrical system or I/O signals. Safety Bypass:

"She’s stubborn today," said a voice from behind. fanuc wn57 override function is active

Troubleshooting:

Part 6: Preventive Measures – How to Avoid WN57 Forever

Best practice for operators:

Has anyone else encountered the WN57 alarm while rigid tapping? Share your experience below! 👇

This Fanuc message indicates that a customized Override Function (WN57) FANUC WN57 Override Function — Complete Write-up Overview

Ensure all maintenance or debugging tasks are complete before disabling this function, as it may impact signal monitoring used during setup. for other PMC signals on your Fanuc Controller