To help give you the most accurate advice for clearing this warning, please let me know:
: It indicates that an override setting—such as Feedrate Override, Spindle Override, or Rapid Traverse Override—is currently engaged or forced.
If the operator or the program has engaged a spindle override while the machine is performing a critical, high-torque operation—like rigid tapping—the PMC may trigger a WN57 warning to indicate that the spindle speed is not matching the exact programmed speed required for the thread pitch. 2. Tool Change/ATC Interference fanuc wn57 override function is active
) Enabled: The dry run function is active, replacing programmed feedrates with a uniform manual feedrate for air-cutting tests.
The WN57 alarm is a —meaning it originates from the PLC (Programmable Logic Controller) side of the CNC, not the main NC (Numerical Control) program. To help give you the most accurate advice
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.
: If a technician was recently working on the machine, they may have used the Forced I/O function in the PMC to override a signal. Per the Fanuc 30i/31i/32i Handbook , an "Override Mode" of the forced I/O can be active for up to three paths simultaneously. Tool Change/ATC Interference ) Enabled: The dry run
This is not a critical machine failure, but rather a . Here is a breakdown of what it means, why it appears, and how to resolve it.
While the specific implementation varies by machine tool builder, "WN57 Override Function is Active" typically relates to [1]. Here are the most common scenarios: 1. Spindle Override/Override During Rigid Tapping
Ensure all safety guards, enclosures, and perimeter doors are fully closed and latched.
If physical dials do not clear the warning, the issue resides in the software interface: Press the SYSTEM hardkey on the FANUC panel. Navigate to the PMC softkey →right arrow PMCDGN (Diagnostics) →right arrow STATUS .