Fanuc Wn57 Override Function Is Active May 2026
This Fanuc message indicates that a customized Override Function (WN57)
The message "WN57 OVERRIDE FUNCTION IS ACTIVE" 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? fanuc wn57 override function is active
Part 5: Common Misconceptions & Myths About WN57
Myth 1: “WN57 means my FANUC control has corrupted software.” This Fanuc message indicates that a customized Override
Machine Builder Configuration (Advanced) If you are a machine tool builder, consider modifying the ladder logic so that WN57 appears as a pop-up dialog with instructions (e.g., “Turn MLK off on panel OPR07”), rather than a cryptic message. “Turn MLK off on panel OPR07”)
To clear this alarm and return the machine to its standard operating state, you must turn off the override function: Via PMC Parameters Screen: Navigate to the PMC Parameter setting screen on your CNC control. Locate the (倍率) function option. Move the cursor to this setting and change it to "Disabled" Restart the CNC to clear the alarm. Via Keep Relay (K-Address): The override function is often mapped to keep relay Directly changing the value of K906.0 to 0
Temporary Bypasses: Allowing the machine to function temporarily while waiting for a replacement sensor.
