Fanuc Wn57 Override Function Is Active

A technician may have used the override function to bypass a faulty interlock or sensor during a recent repair and forgot to disable it.

"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."

A very specific topic!

According to the FANUC programming manual, the override function also requires the setting of "OVERRIDE ENABLE" in the setting parameters. The official recommendation states: "CAUTION Set this setting to NO(0) before shipment of the machine. If this setting is left as YES(1), the operator may stop execution of the ladder program by mistake".

If a manual intervention occurs mid-cycle—such as pausing execution via Feed Hold or switching the machine into Single Block mode while an override parameter is processing in the background—the ladder logic may flag the state as WN57 until the cycle resumes normally. Step-by-Step Troubleshooting and Resolution fanuc wn57 override function is active

He pressed the Reset button. The message flickered, held for a second, and reappeared. The spindle sat locked. The axis motors hummed a low, waiting tone, but the G-code execution was paused. The machine was effectively saying, I’m not moving until you look at what I’m seeing.

When using the WN57 override function, operators should follow these best practices and safety considerations: A technician may have used the override function

However, running production while this warning is active is highly inefficient, as cycle times will balloon due to capped feedrates. To maintain high productivity and safety:

The WN57 code is a warning (indicated by the "WN" prefix) rather than a hard alarm (often prefixed by "AL"). It signals that an override function on the CNC operator panel or within the software parameters is currently modified from its standard 100% baseline. "Check the Dry Run switch