position. On certain machines, if the control detects that the override dial is locked into a specific low percentage during a critical automatic cycle, it triggers WN57 to alert the operator that the cycle time will be extended. 2. Safety Interlock Bypasses (Setup Mode)
Machine operators encountering the WN57 alarm should:
Modern machining centers utilize strict safety interlocks. When setting up a job with the enclosure doors open, operators often turn on a setup switch or a key-switch (such as a hardware override mode) to manually jog axes or spin the spindle at reduced speeds. If this key-switch is left in the setup position, or if the door interlock bypass is active, WN57 will stay triggered. 3. Dry Run or Feedrate Override Switches
Alternatively, check if variable #3004 (which controls feedrate, exact stop, and pause overrides) has been set to a value other than 0 . If it is locked, executing #3004=0 in MDI mode will instantly restore normal override control. Impact on Production If Ignored
Ensure operators understand the significance of the WN57 alarm and know to report it immediately.
If step 1–3 fail, the is holding WN57 active.
When active, the feedrate or speed is dictated by the PMC logic rather than the physical operator panel dial. Where to Check: (PMC Maintenance) screens for the specific status of WN57. Potential Reasons for Activation Custom PMC Function:
The physical rotary knob for feedrate override on the operator panel is set to less than (or greater than) 100%.
While it typically does not lock the control panel, leaving this function active can cause unexpected program execution speeds, cycle time fluctuations, or accidental safety risks. Understanding how to diagnose, navigate, and clear this warning is essential for maintaining production efficiency and shop floor safety. Technical Context: What Does WN57 Mean?
Look at the current program execution screen. Check if a modal G-code is forcing an override state. For example, some machine setups utilize specific macro variables or regional
position. On certain machines, if the control detects that the override dial is locked into a specific low percentage during a critical automatic cycle, it triggers WN57 to alert the operator that the cycle time will be extended. 2. Safety Interlock Bypasses (Setup Mode)
Machine operators encountering the WN57 alarm should:
Modern machining centers utilize strict safety interlocks. When setting up a job with the enclosure doors open, operators often turn on a setup switch or a key-switch (such as a hardware override mode) to manually jog axes or spin the spindle at reduced speeds. If this key-switch is left in the setup position, or if the door interlock bypass is active, WN57 will stay triggered. 3. Dry Run or Feedrate Override Switches fanuc wn57 override function is active
Alternatively, check if variable #3004 (which controls feedrate, exact stop, and pause overrides) has been set to a value other than 0 . If it is locked, executing #3004=0 in MDI mode will instantly restore normal override control. Impact on Production If Ignored
Ensure operators understand the significance of the WN57 alarm and know to report it immediately. position
If step 1–3 fail, the is holding WN57 active.
When active, the feedrate or speed is dictated by the PMC logic rather than the physical operator panel dial. Where to Check: (PMC Maintenance) screens for the specific status of WN57. Potential Reasons for Activation Custom PMC Function: Understanding how to diagnose
The physical rotary knob for feedrate override on the operator panel is set to less than (or greater than) 100%.
While it typically does not lock the control panel, leaving this function active can cause unexpected program execution speeds, cycle time fluctuations, or accidental safety risks. Understanding how to diagnose, navigate, and clear this warning is essential for maintaining production efficiency and shop floor safety. Technical Context: What Does WN57 Mean?
Look at the current program execution screen. Check if a modal G-code is forcing an override state. For example, some machine setups utilize specific macro variables or regional