When this warning appears on your FANUC i-Series (like the 0i-F, 31i-B, or newer Plus models) screen, it is typically caused by one of the following scenarios: 1. Robot or Loader Interface Synchronization
At the end of all your test programs, include:
Verify if a stuck physical switch is continuously sending a 0V or 24V signal to the I/O module. Step 4: Clear the Buffer via MDI Mode Switch the machine mode to .
specifically belongs to a family of safety and interlock warnings. It translates to: “The control is currently in a state where manual or automatic override functions are engaged, preventing the requested action.” fanuc wn57 override function is active
FANUC alarms are categorized by prefixes:
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.
Is the machine , or is it completely stopped? When this warning appears on your FANUC i-Series
If your CNC mill or lathe is paired with a FANUC robot or a gantry loader, they must share workspace coordinates safely. When the robot enters the machine envelope to load a raw blank or unload a finished part, the CNC activates an override function. This ensures the machine axes cannot move at high speeds—or move at all—while the robot is inside. If the handshake signal gets stuck, WN57 remains on the screen. 2. Manual Interlock or Setup Mode (Door Open Override)
To clear the WN57 warning and return your CNC machine to nominal operational speeds, follow these diagnostic steps: Step 1: Check Physical Switches and Keys
If this message appeared suddenly after a crash or battery change, it may be related to a Safety PLC forcing a "slow mode" until a safety fault is cleared or the home position is re-established. specifically belongs to a family of safety and
To remove the WN57 warning, you must disable the override function in the PMC parameter settings. Here are the common methods, ordered from simplest to most technical. Method 1: Changing the PMC Parameter Screen (Recommended) Go to the or PMC screen on your Fanuc controller. Navigate to the PMCPRM (PMC Parameter) screen. Find the option for "Override" or "Force".
If you're interested, I can provide tips on how to properly set up your Fanuc maintenance schedule to avoid similar, unrelated errors in the future.
To help pinpoint exactly why this warning is showing up on your control, could you tell me:
A: Yes. The 0i-Mate series (common on lathes and mills) exhibits WN57 identically for Dry Run and Machine Lock functions.
To help give you the most accurate advice for clearing this warning, please let me know: