Fanuc Starting System Software Please Wait [best] May 2026

The hum of the factory floor was a constant, rhythmic heartbeat, but for Elias, the silence of Cell 7 was deafening. He stood before the yellow arm of the FANUC M-20iA, a silent sentinel frozen mid-arc. On the teach pendant in his hand, the backlight flickered to life, revealing the words he had seen a thousand times, yet today they felt heavy:

Reseat the CPU: For older models like the R-J series, the CPU module can become unseated over time due to vibration. Power down the machine, carefully remove the CPU module, inspect for corrosion, and reseat it firmly. fanuc starting system software please wait

What happens during this process?

  • Loading the IPL (Initial Program Loader).
  • Decompressing CNC control software.
  • Checking and mounting the SRAM (user parameters, programs, offsets).
  • Initializing the PMC (Programmable Machine Controller) ladder.
  1. Power off.
  2. Press and hold - (minus key on numeric pad) + . (period) while powering on.
  3. The IPL menu appears. From here:

    What does it mean?

    Troubleshooting: "FANUC Starting System Software Please Wait"

    What it means

    When a FANUC CNC displays "Starting system software please wait" (or similar), the controller is initializing firmware, loading system software modules, or performing a firmware/self-check after power-on or a reboot. It can be normal for several seconds to a few minutes, but extended or repeated hangs indicate a problem. The hum of the factory floor was a

    • Broken servo amplifier feedback: If the CNC initializes the FSSB before completing the system software load (a rare sequence bug), a failed servo drive board on the I/O link can cause a deadlock.
    • Faulty flush-mount CF card or USB drive: Some FANUC models (31i-B, 0i-D) check removable media during boot. A corrupted USB stick inserted in the front port can stall the loader.

    Final Note: If "Please Wait" appears after a normal shutdown and never progresses, do not repeatedly power cycle. This can corrupt the FROM (flash memory). Use IPL mode first. Always maintain current backups – FANUC systems are robust but unforgiving of lost parameter files. Loading the IPL (Initial Program Loader)