Here’s a useful, practical review of the message, written for CNC operators and setup personnel.
After performing a (mid-program start), the operator may not complete the "distance-to-go" cancellation. The controller remains in an “Override” state (a type of position deviation allowance) until the cycle start is pressed again. Attempting to edit or reset the sequence prematurely triggers WN57.
On modern FANUC ROBODRILL machines, working inside the enclosure with the doors open requires entering a specific setup mode. Activating these key-switches or panel buttons bypasses standard safety protocols and automatically locks the machine into a low-speed override mode (often capped at 2 meters per minute or 25% rapid speeds) for operator safety. 4. PLC / PMC Keep Relay Configurations fanuc wn57 override function is active
This article is for informational purposes. Always consult your specific FANUC CNC manual and machine tool builder’s documentation before performing maintenance or altering operational procedures.
Look up the feedrate override signals ( for bits *OV0 to *OV7 ). A broken wire or failed rotary switch contact can send a continuous override signal to the control, even if the physical knob points to 100%. Summary for Operators Here’s a useful, practical review of the message,
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: Speed and feed overrides can be dynamically disabled or locked via macro variables. If the override is disabled through a macro, the machine ignores the physical dial, which can lead to unpredictable speeds if the operator is not alerted by the "Override Active" status. Common Related Alarms Attempting to edit or reset the sequence prematurely
In CNC machining, precision and safety depend on communication between the machine tool builder (MTB) and the FANUC control system. When your system displays the warning, the control is flagging a specific operating state. While it looks like an error, it is an operational status notification. What is the WN57 Warning?