Fanuc Wn57 Override Function Is Active ^hot^ Jun 2026

"Maybe it's not the dial," Marcus suggested, setting his coffee down. He pointed to a small, unassuming button on the lower right of the panel, partially obscured by a chip guard. "Check the Dry Run switch."

Schedule regular audits of PMC parameters, particularly K900.1 (programmer enable) and override-related settings.

If the message persists, it means the PMC still thinks a condition is being overridden. A maintenance technician may need to look at the CNC diagnostic screens (PMC -> PMCDGN -> STATUS) to identify which input is forcing the override, often listed under specific diagnostic addresses.

If you see the WN57 message during normal production, it means this "force" mode was left on, which may cause the machine to ignore safety interlocks or standard operating conditions. How to Deactivate the WN57 Override fanuc wn57 override function is active

is currently active within the PMC (Programmable Machine Control)

Comprehension of basic ladder programming concepts.

| Your goal | What to do | |-----------|-------------| | | Set rapid/feed override to 100%, dry run OFF, press RESET | | Run with override <100% | Ignore the warning if machine allows | | Machine refuses to run | Call machine tool builder – they set the logic | | You want to disable it | Check PMC ladder or FANUC parameter 3001#5 (OVW) | "Maybe it's not the dial," Marcus suggested, setting

Similar to the feedrate dial, the Spindle Speed Override dial allows manual adjustments to the rotational speed of the tool or workpiece. Operating the spindle above or below the programmed 100% value will often trip this warning. 3. Rapid Traverse Override is Engaged

Ensure the machine enclosure doors are fully closed and latched. Check the operator mode key switch. If it is turned to a setup, edit, or manual intervention mode, turn it back to the standard "Automatic" or "Run" position. Step 3: Inspect the PMC Signal Status

If the button is toggled on, the machine substitutes programmed feedrates with a manual feedrate controlled by the jog dials. Turn off the Dry Run switch on the operator panel. Step 3: Check G-Code Override Suppression Codes If the message persists, it means the PMC

The message "WN57 override function is active" indicates that one or more feedrate or spindle override functions are currently enabled on a FANUC CNC control. This is a status/notification describing that the machine will not run at the programmed nominal feed or spindle speed because operator overrides are modifying those values in real time.

-codes to lock overrides during tapping cycles or critical boring operations. How to Clear the WN57 Warning

Always verify that the override function has been properly disabled before releasing the machine for production.