While categorized as a warning or operational status message rather than a critical hardware fault, this state can halt automatic cycle execution, prevent specific macro execution, or alter expected tool paths. Technical Definition of WN57
Ensure the machine is physically configured for automatic production.
During setups, operators frequently clamp the Rapid Traverse (G00) speeds down to 25%, 5%, or a low F0 rate to prevent catastrophic crashes. If the machine enters automatic cycle with these restrictions active, WN57 alerts you that production times will be significantly extended. 4. PLC/PMC Hardcoded Override Functions
The most frequent cause is simply physical adjustment on the operator panel. fanuc wn57 override function is active
On many FANUC 31i models, the CYCLE START button itself serves as the confirmation to exit "override active" state after the physical switch is turned off. Do not just reset – attempt cycle start.
This warning is not typically a mechanical failure but rather a status notification from the machine's Programmable Machine Controller (PMC) indicating that a debugging feature has been left enabled. This article will explain what this alarm means, why it appears, and how to safely resolve it to resume normal machine operation. What is the WN57 Override Function?
: An external PLC or supervisor system is sending a signal to the controller to limit speed for safety or process consistency. How to Address or Reset It While categorized as a warning or operational status
Is the machine , or is it completely stopped?
on FANUC CNC controls indicates that the machine is running with an active feed override or rapid override function tied to a safety or watchdog feature that modulates axis motion. It’s commonly seen as a displayed override status (often in the MPG/MDI or alarm/message area) when the control has detected a condition where commanded motion has been limited or overridden by the system. The exact behavior and causes vary by FANUC series and machine OEM implementation.
temporarily to verify program flow. Why It Needs to Be Deactivated If the machine enters automatic cycle with these
In CNC machining, precise control over axis movements and spindle speeds determines part quality and operator safety. FANUC CNC systems use specialized alerts to communicate when the machine departs from normal execution states. One such specific warning is the alert.
While Machine Lock stops axis movement entirely, toggling related check functions can sometimes prompt override warnings depending on the builder's PLC logic. 4. PMC Ladder Logic and Parameter Constraints
The physical rotary knob for feedrate override on the operator panel is set to less than (or greater than) 100%.