NMI Alarm in Other Board

What does 972 mean?

This alarm indicates a Non-Maskable Interrupt (NMI) originating from a board other than the BOC or SLC within the Fanuc Series 20 CNC system. This suggests a critical hardware malfunction on an auxiliary or expansion board, leading to a system halt.

• Faulty auxiliary board (e.g., graphics board, I/O expansion board) or its associated circuitry.
• Memory error on the affected 'other' board.
• Power supply irregularities to the affected board.
• Loose or improperly seated auxiliary board.
• Physical damage to the board.

Click steps to track your progress.

1. 1

   Power cycle the CNC system to attempt a reset of all components and clear the NMI.

2. 2

   Identify any auxiliary or expansion boards installed in the CNC. Inspect them for proper seating and connection.

3. 3

   Verify stable and clean power supply to all installed boards within the CNC cabinet.

4. 4

   Inspect all installed boards for any visible damage, such as burn marks or damaged components.

5. 5

   If possible, remove non-essential auxiliary boards one by one and power cycle to isolate the faulty board.