The “FANUC Starting System Software, Please Wait” screen is a normal part of CNC booting, but extended hangs signal SRAM corruption, dead batteries, or flash file system errors. Understanding the boot sequence and IPL recovery can save hours of downtime. Always maintain current backups and a battery replacement schedule – these simple steps prevent most “Please Wait” nightmares.
Technical Reference: FANUC Series 30i/31i/32i Maintenance Manual (B-65285EN), FANUC Boot System Operator’s Manual (B-63944EN).
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:
Troubleshooting "FANUC Starting System Software Please Wait" Error
If you're encountering the "FANUC Starting System Software Please Wait" message on your FANUC control system, it typically indicates that the system is initializing or attempting to load the necessary software components. This message can appear during the startup process of FANUC CNC systems or other machines equipped with FANUC controls. Here are some insights and steps you can take to troubleshoot or understand the situation better:
| Function | Key Combo (Power on while holding) |
|----------|-------------------------------------|
| Clear SRAM (cold start) | RESET + DELETE |
| IPL menu | - + . |
| Load system software | ` (backquote) + - |
| Bypass PMC (boot no ladder) | CAN + 0 (zero) | fanuc starting system software please wait
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.
The message "Starting System Software. Please Wait" appears when a Fanuc controller (like the
or R-J series) attempts to load its operating system from memory during power-up
. If the controller stays stuck on this screen indefinitely, it usually points to a failure in the boot sequence, often due to hardware issues, corrupted software, or communication errors. Potential Causes Corrupted Software or Memory
: The system files on the SRAM or FROM (Flash ROM) may be corrupted, preventing the OS from loading. Hardware Failure The “FANUC Starting System Software, Please Wait” screen
: A faulty CPU board, SRAM card, or a dead CMOS/main board battery can cause a boot failure. Power Supply Issues
: Unstable 24VDC power or a slow-rising power supply can cause a "race condition" that halts the boot process. Peripheral Faults
: A bad Teach Pendant (TP) cable or a faulty TP itself can occasionally prevent the system from advancing. Common Solutions Perform an "INIT Start"
: This clears the SRAM and can fix issues caused by corrupted system files. To access this, hold the Prev and Next
on some models) while turning on the power to enter the Boot Monitor. Restore from Image Backup Final Note: If "Please Wait" appears after a
: If an INIT start fails, you may need to reload a known good image or backup from a USB or memory card. Check Status LEDs
: Look at the main board's 7-segment LED display or the small green status LEDs. Normally, the top two should blink and the bottom two should stay solid; deviations indicate specific hardware faults. Hardware Swapping
: If multiple machines are available, swapping the Teach Pendant or cable with a working unit can help rule out peripheral failures. Are you currently seeing a specific number
on the 7-segment display on the main board while it's stuck?
Is the R30IB controller stuck on "system software starting up"?
FANUC power supplies are resilient, but a 24VDC supply that is dropping to 19V or spiking to 30V due to a failing PSU can cause the CPU to reset mid-boot. The message appears, then the watchdog timer resets the CNC, looping endlessly.