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Fanuc Wn57 Override Function Is Active <VERIFIED>

"WN57 OVERRIDE FUNCTION IS ACTIVE"

This message——appears on FANUC CNC controls (often on series like 0i, 30i, 31i, 32i, or 21i) when the control is operating in a special override mode that bypasses certain safety or standard operating limits.

protective notification

This is not a critical machine failure, but rather a . Here is a breakdown of what it means, why it appears, and how to resolve it. fanuc wn57 override function is active

For the operator, this message can be misleading. Attempting to adjust the override dial on the control panel will typically have no effect, as the restriction is software-enforced, not user-controlled. This distinction highlights the importance of distinguishing between a "user override" and a "system override." The latter implies a fault condition that must be cleared before normal manual control is restored. Check before cycle start – Scan the message line

simultaneously. If four or more paths are set to override mode, you may encounter related errors like ER47 ILLEGAL OVERRIDE FUNCTION SETTING Keep Relay screen for your particular Fanuc control series? press Dry Run again

Step 3: Cancel Block Search State

  1. Check before cycle start – Scan the message line. If you see WN57, verify which override is active (usually shown on the position screen).
  2. Dry Run = great for prove-out – Use it to check toolpaths in the air, but never with the part in the machine.
  3. Rapid Override 25% is wise during setup or first run to avoid crashes.
  4. Don’t ignore it – Many crashes happen because an operator left Dry Run ON and then ran a real part.
  5. Clearing it – Simply turn off the active override (e.g., press Dry Run again, or set Rapid Override to 100%). The message disappears immediately.
fanuc wn57 override function is active