temporarily to verify program flow. Why It Needs to Be Deactivated
“WN57 means my FANUC control has corrupted software.”
In automated cells where a FANUC robot interacts with a CNC mill or lathe, the programmable machine control (PMC) manages safety handshakes. If a robot is entering the machine envelope, or if a safety door is open, the PMC may automatically force an override state (e.g., forcing rapid traverse to 0% or 10%) to prevent collisions. WN57 will stay active until the safety conditions are cleared. 3. Macro Program Variables (G-Code Override Suppression)
Ensure all safety doors are fully closed and the interlock keys are properly seated in their switches.
这是最通用、操作界面最友好的方法。
On newer FANUC i-Series (Series 0i-F, 31i-B5), overrides can be triggered via soft keys:
Directly change the keep relay address to 0 . Setting this bit to 0 disables the override function and should clear the WN57 alarm after a system restart .
Locate the rotary switch and turn it precisely to 100% .
When the WN57 override function is active, the operator can use the machine's control panel to adjust the feed rate or spindle speed in a specific range, usually between 0% and 150% of the programmed value. This allows for quick adjustments to be made without having to modify the part program.
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.
alarm may also appear if too many PMC paths (more than three) are being overridden simultaneously. Course Hero
Check if the WN57 message disappears from the bottom of the CRT/LCD screen. Step 2: Check Softkey and Toggle Statuses Look at the operator panel for illuminated toggle buttons. Ensure that is turned off.
Ensure the robot has fully retracted to its "Home" or "Safe" position outside the machine.
If the dials are at 100% but the screen shows otherwise, check the digital inputs: Press the key, then select the PMC softkey.
