On FANUC 0i-D and later, press the [SYSTEM] button, then the [CONDITION] soft key. This displays a live status of all overrides (MLK, DRY, SBK, AUX). Make this your default screen during setup.
If your program requires strict adherence to programmed feeds (like during tapping cycles), ensure your G-code isn't conflicting with machine states.
Controls whether dry run is valid during automatic operation. fanuc wn57 override function is active
When any of these functions are in an "active" state, the CNC is technically not in pure Memory or MDI operation. The WN57 warning appears when you attempt to change modes (e.g., from EDIT to MEM) or start a program while one of these overrides is still engaged.
: When the WN57 override function is used, it's vital to document the changes made, including the reason for the override and the specific adjustments. This helps in maintaining accurate records and aids in troubleshooting or reproducing parts. On FANUC 0i-D and later, press the [SYSTEM]
| Symptom | Likely cause | Action | |--------|-------------|--------| | WN57 only, machine runs fine | Override ≠ 100% | Accept or set all overrides to 100% | | WN57 + no cycle start | Builder lock active | Set all overrides to 100%, dry run OFF, then RESET | | WN57 appears after power-on | Stored override value | Reset control, check last active override | | WN57 + weird axis movement | Custom PMC override mode | Call machine tool builder |
If you are a machine tool builder, consider modifying the ladder logic so that WN57 appears as a pop-up dialog with instructions (e.g., “Turn MLK off on panel OPR07”), rather than a cryptic message. If your program requires strict adherence to programmed
Certain parameters govern how overrides behave. Review these settings (consult your machine manual before changing any values):
On a system, the message " Override function is active " (often associated with diagnostic or status signals like WN57 ) is an interesting safety and operational feature primarily designed to manage machine behavior when standard speed or feed constraints are being bypassed . Key Aspects of the Override Active Feature
parameters) may permanently activate an override function until explicitly toggled off via the MDI (Manual Data Input) panel. Step-by-Step Troubleshooting and Resolution