Fanuc Wn57 Override Function Is Active May 2026

Debugging and testing the sequence program during machine setup or intensive maintenance.

A technician may have used the override function to bypass a faulty interlock or sensor during a recent repair and forgot to disable it. fanuc wn57 override function is active

Because WN57 is an "active" status rather than a failure, it can usually be resolved by toggling the function off through the CNC’s internal settings or by modifying a specific Keep Relay ( -address). Method 1: Using the PMC Parameter Screen Navigate to the on your FANUC controller. Select [PMC SET] or [PMC PARAM] . Look for the Setting or Override sub-menu. Debugging and testing the sequence program during machine

If the machine was recently accessed remotely via FANUC LADDER-III software, the override might have been triggered from the external PC. Summary Table: WN57 Message Details Description Message Type PMC Status/Warning (WN) Standard Address Typically controlled by K906.0 Criticality Low (Warning), but unsafe for production Required Action Disable Override Function in PMC Settings Method 1: Using the PMC Parameter Screen Navigate

The message is a specific PMC (Programmable Machine Control) warning often encountered on FANUC Series 0i and 30i/31i/32i CNC systems. Unlike critical hardware alarms that halt all operations, WN57 is primarily a status notification informing the operator that a specific debug or maintenance mode has been left enabled. What is the WN57 Override Function?

In rare cases, a loss of CMOS memory or a failing backup battery can cause parameters and keep relays to scramble, potentially "flipping" the bit for the override function.