Understanding why this warning appears requires looking at both machine tool builder (MTB) logic and FANUC safety parameters. 1. Active Maintenance or Setup Modes
Controls whether dry run is valid during automatic operation.
You should now be able to start the tapping or threading operation without the WN57 alarm.
Locate the and Rapid Traverse dials on your operator interface. Turn both dials exactly to the 100% position. fanuc wn57 override function is active
, disengage the Dry Run or Setup keys, close all safety guarding, and press the button on the MDI panel.
Modifying PMC parameters requires proper training and authorization. Incorrect changes can affect machine operation or safety.
position. On certain machines, if the control detects that the override dial is locked into a specific low percentage during a critical automatic cycle, it triggers WN57 to alert the operator that the cycle time will be extended. 2. Safety Interlock Bypasses (Setup Mode) Understanding why this warning appears requires looking at
is currently active within the PMC (Programmable Machine Control)
Check the status of PMC bits related to override signals (commonly mapped to G-bytes such as G0012 for feedrate override).
To clear this message and return the machine to standard operation, you must turn off the override function: Via PMC Parameters Navigate to the PMC Setting screen on your FANUC control. Find the option for Override Effective Set this value to Restart the CNC to clear the alarm. Via Keep Relay (K-Address) Directly change the keep relay You should now be able to start the
: The message may appear if the machine is in Dry Run mode or if a Machine Lock function is active.
simultaneously. If four or more paths are set to override mode, you may encounter related errors like ER47 ILLEGAL OVERRIDE FUNCTION SETTING Keep Relay screen for your particular Fanuc control series?
For more tailored information, please verify if this is on a FANUC ROBODRILL OPERATOR'S MANUAL or a similar specialized machine.
Ensure is disabled if you are trying to execute a continuous automatic cycle.