On certain models like the Fanuc 30i/31i/32i, excessive override paths (more than three) may trigger related alarms (like ER47) that require a full CNC restart to clear after settings are adjusted. ladder logic addresses
The (also written as W057 ) is a status message on FANUC Robodrill and CNC systems indicating that the Override Function is currently active. fanuc wn57 override function is active
by technicians to manually force PMC signals (I/O) during system setup or troubleshooting. While active, it can interfere with the normal logic of the ladder program, which may cause unexpected machine behavior. How to Disable the Message On certain models like the Fanuc 30i/31i/32i, excessive
WN57 is not generated by the CNC core itself; it is generated by the based on specific diagnostic signals. The CNC sends a "mode change request" to the PMC. The PMC checks the following signals (typical addresses – confirm against your ladder diagram): While active, it can interfere with the normal
The main purpose of the WN57 override function is to:
While this function is active, the PMC may not operate according to its standard programmed logic because signals are being "overridden" for testing purposes. It is generally recommended to disable this function once debugging is complete to ensure normal machine operation .
