Fanuc Wn57 Override Function Is Active [upd]

If you want, I can produce a short checklist tailored to your machine model (e.g., FANUC Oi-MF, 32i-A) showing exact keys/screens to inspect.

In FANUC-controlled CNC environments, encountering unexpected system state messages can halt production. One such message is the warning.

Suppose an operator is machining a part with a programmed feed rate of 100 mm/min. During machining, the operator notices that the tool is experiencing excessive wear due to the hardness of the material. To mitigate this, the operator activates the WN57 override function and reduces the feed rate to 80 mm/min (80% of the programmed value). This adjustment helps to reduce tool wear and extend tool life. fanuc wn57 override function is active

Machine operators encountering the WN57 alarm should:

In the FANUC control ecosystem, "WN" prefixes generally denote warnings or operator messages rather than critical system faults (which usually carry an "ALM" prefix). If you want, I can produce a short

"The WN57 alarm is a serious machine fault requiring immediate service."

FANUC recommends: "If you want to protect this setting, please make a sequence that always writes 0 in this bit by your ladder". This ensures that even accidental attempts to enable the override function are prevented. Suppose an operator is machining a part with

After making the change, restart the machine to allow the PMC to load the new configuration. The PMC alarm should disappear upon restart.

FANUC系统的PMC是内置于CNC中的PLC，通过梯形图程序执行机床的各类辅助功能，如控制冷却液开关、刀库换刀、工件夹紧等。梯形图的逻辑正确性直接影响机床的稳定运行。

| Item | Detail | |------|--------| | | Warning message number (varies slightly by FANUC model) | | 57 | Specific alarm/warning code | | Override function active | The CNC is using a non-standard override (e.g., rapid traverse override, feed override beyond normal limits, or special parameter-enabled override) |