While this is typically classified as a warning rather than a hard system alarm, it indicates that the machine is operating under altered conditions. Understanding why this warning appears, what it means for your production, and how to safely resolve it is critical for maintaining efficient CNC operations. What Does the WN57 Warning Mean?
This variable sets the maximum allowed running speed for programs. If the programmed speed exceeds this value, the system automatically limits it.
The override function is a developer's tool for debugging and testing the machine's ladder logic. Ladder logic (the PMC's program) consists of conditional statements based on input signals (like from limit switches) that determine output signals (like starting a motor). This tool allows programmers to temporarily bypass real-world inputs and set a signal to "1" (ON) or "0" (OFF) to test how the program responds. This is crucial for simulating faults without physically triggering a sensor.
While the specific implementation varies by machine tool builder, "WN57 Override Function is Active" typically relates to [1]. Here are the most common scenarios: 1. Spindle Override/Override During Rigid Tapping fanuc wn57 override function is active
Resolving the WN57 message depends entirely on whether it is an intentional operator choice or an unexpected system state.
Because WN57 is categorized as a warning, it usually a running program automatically. However, leaving it unaddressed causes several operational bottlenecks:
This is the most straightforward method to resolve the WN57 alarm: While this is typically classified as a warning
Press the RESET button to clear the current look-ahead buffer.
On some machines, turn the rapid override completely off or to the designated "Normal" notch. Step 2: Deactivate Auxiliary Modes
temporarily to verify program flow. Why It Needs to Be Deactivated This variable sets the maximum allowed running speed
Move the cursor to the override function option and change the setting from "effective" to "not effective" (or "YES" to "NO").
Overriding normal signal processing can bypass safety interlocks and protective features.
The WN57 alarm typically appears under several circumstances: