Fanuc Starting System Software Please Wait !new!

The message "Starting system software. Please wait" is a standard part of the Fanuc controller's boot process, but if it remains on the screen for several minutes without progressing, it indicates a critical system hang. This typically happens when the controller cannot load the core software from its internal memory or finish its initial self-checks. Common Causes for System Hangs

When a Fanuc controller gets stuck on this screen, the root cause is often related to either data corruption or hardware failure:

Software Corruption: A sudden power outage or battery failure (especially the RAM/SRAM battery) can corrupt system files, preventing the software from loading.

Hardware Malfunction: Issues with the Main CPU board, DRAM, or the SRAM card can stop the boot sequence.

Peripheral Failure: A faulty Teach Pendant (TP) or a damaged TP cable can freeze the screen before the software can fully initialize.

Power Issues: Low voltage or a failing Power Supply Unit (PSU) can prevent the main board from receiving the stable power needed to complete the boot cycle. Initial Troubleshooting Steps

Check Hardware Indicators: Open the controller door and look at the 7-segment LED display on the main CPU board. A specific number (e.g., "1" or "0") often indicates where the boot process failed.

Verify the Teach Pendant: If possible, swap the Teach Pendant or its cable with a known working unit to see if the hang is localized to the display. fanuc starting system software please wait

Perform a Safe Reboot: Power the controller down completely, wait at least two minutes for all power to drain, and then power it back on. Advanced Recovery Methods

If basic troubleshooting fails, you may need to access the Boot Monitor (BMON) menu to restore the system:

Is the R30IB controller stuck on "system software starting up"?

The message "Starting System Software. Please Wait" indicates the controller is failing to complete its boot sequence, often due to corrupted system files, hardware failure (such as a bad CPU or SRAM card), or configuration issues like memory depletion. Immediate Troubleshooting Steps Check the 7-Segment LED Display

: Open the controller door while powered on and check the red 7-segment display on the main CPU board.

: Often points to a parity alarm in DRAM or a main board issue.

: Commonly means the system is waiting or has a deep hardware fault. Only a dot The message "Starting system software

: May indicate a need to replace the Teach Pendant (TP) cable or the mainboard itself. Verify Main Board LEDs

: Ensure the four green LEDs on the main board are active. Ideally, the top two should blink bottom two should be solid Perform an INIT Start : This clears the SRAM and can fix corruption issues. Power down the controller.

on the Teach Pendant while powering back up to enter the Boot Monitor menu. INIT Start . Note: This may require reloading a backup. Hardware and Software Recovery

Is the R30IB controller stuck on "system software starting up"?

Fanuc controller "Starting system software, please wait" messages typically indicate an initialization failure stemming from corrupted system files, hardware faults in the SRAM/CPU, or teach pendant communication issues. Troubleshooting involves checking for 7-segment display error codes and performing an "INIT Start" to clear the SRAM, or restoring a previous system image. For further troubleshooting, see the discussion at

Is the R30IB controller stuck on "system software starting up"?

Part 3: Immediate Action Plan – Do Not Panic

When you see the frozen "FANUC STARTING SYSTEM SOFTWARE PLEASE WAIT" screen, follow this structured troubleshooting sequence. Do not arbitrarily cycle power more than 3 times, as repeated power cycling can worsen SRAM corruption. Part 3: Immediate Action Plan – Do Not

4. Hardware Hang – Main CPU Board or Peripheral Conflict

Less common but more severe: the main processor (often a 32-bit RISC chip like the FANUC I/O Link processor) enters an undefined state.

For FANUC 30i/31i/35i Series (Modern Controls)

  1. Power on while holding the "RIGHT ARROW" and "DOWN ARROW" soft keys (or refer to your specific maintenance manual).
  2. The IPL Monitor menu appears.
  3. Choose "System Software Installation" or "Load from Memory Card."
  4. Insert the FANUC software package (usually supplied by the machine builder).
  5. Load the boot application, CNC control software, and servo software sequentially.
  6. Reboot and restore your machine parameters.

Critical note: Reloading system software erases all CNC parameters, pitch comp, and programs. You must have a separate backup (e.g., SRAM backup file CNC.PRM or a paper printout). Without this, your machine will boot but will not move correctly—servo parameters and axis configuration will be defaulted.

1. Introduction

If you operate or maintain a FANUC CNC (Computer Numerical Control) machine or industrial robot, you have likely seen the stark, amber-on-black screen message:

FANUC STARTING SYSTEM SOFTWARE PLEASE WAIT

This is not an error, but a critical state in the boot process. However, when it persists for an unusually long time (more than 5–10 minutes) or appears in a boot loop, it signals a fundamental issue with the controller’s software integrity, hardware, or data storage.

This piece explains what the system is doing during this phase, why delays happen, and how to diagnose them.

2. Perform Regular System Backups

Every 3 months, use the Boot Monitor to save:

Store copies on two different media (CF card + network drive).

B. Power Supply Unit (PSU) Voltages

If the power supply is failing, the CPU may power up enough to display a message but not enough to read the memory.