Fanuc Wn57 Override Function Is Active (2024)

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.

What is the exact (e.g., 0i-F, 31i) on your machine?

G10.6 P1 Rxxx; (override active) G10.9 P1 Rxxx;

FANUC systems store alarm information that can be valuable for troubleshooting. To access alarm history: fanuc wn57 override function is active

The WN57 alarm (or status message) on a FANUC CNC control indicates that an override function is currently enabled – typically a rapid traverse override , feed rate override , or a dry run override . Unlike many alarms, WN57 is generally an informational message , not a critical error. The machine will continue to run, but with altered motion parameters.

当FANUC系统显示 报警时，请将此视为 一个来自系统工程师的友好提醒 ：“我正在处于调试模式，请完成调试后关闭”。维护健康、严谨的调试流程远比掌握某种“快速消警”的方法更重要。在每次修改、每次排查结束后执行“关闭与清理”步骤，关闭那个“开关”，才能让机床以最安全、最稳健的状态投入到生产中。希望这份指南能帮助您清晰认识并轻松应对WN57报警，让设备的运行与管理变得更为高效与从容。

In some cases, specific "User Input" (UI) signals from a PLC force this state. Check your I/O status to see if *OVRD_ENB (Override Enable) or similar signals are being held high or low by external logic. : Go to Menu > Setup > Prog Select . The message "WN57 override function is active" indicates

The override function forces specific PMC signals, potentially causing the machine to behave in ways not aligned with standard operation.

This indicates that a function within the machine’s PLC ladder (designed by the machine tool builder, not necessarily FANUC itself) is currently bypassing the standard operation logic.

While the term "override" usually refers to physical knobs for feed or speed on a CNC panel, this specific message refers to a PMC software debugging tool . What WN57 Means The machine will continue to run, but with

This usually refers to a specific PMC parameter (Window Number 57) or a diagnostic register within the CNC ladder logic.

Check the status of PMC bits related to override signals (commonly mapped to G-bytes such as G0012 for feedrate override).

A custom PMC function is currently running, often configured in the Robodrill or similar PMC-controlled machinery. Manual Intervention: Manual intervention occurred during an automatic cycle. System Macro Settings: System macro variable

When using the WN57 override function, operators should follow these best practices and safety considerations: