If the normal boot sequence hangs, you must attempt to bypass it by forcing the controller into its core Boot System menu. Turn the control completely off.
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.
Open the controller cabinet door and locate the LED display on the CPU. Indicates a Parity Error
To resolve the "Please Wait" issue, the following troubleshooting steps can be taken: fanuc starting system software please wait
Did this error happen suddenly during operation, or for a long period?
FANUC controllers use flash ROM (FROM) to store system software and SRAM to store parameters and programs. If these physical modules degrade, or if the main master PCB board suffers an electronic failure, the system cannot read the required boot files. 3. Faulty Memory Card or Peripherals
: If this occurred after a software update or restore, the software may not have loaded correctly. If the normal boot sequence hangs, you must
The message "System software starting up, please wait" on a Fanuc CNC or robot controller indicates the system is hanging during its boot sequence. This screen typically appears as the controller attempts to load critical system files from non-volatile memory (FROM) into the working memory (SRAM). Common Causes for Startup Hangs Corrupted SRAM Data:
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
Disclaimer: The information provided in this article is for general informational purposes only and does not constitute professional or technical advice. FANUC hardware and software systems are complex. You should not rely solely on this information to address a problem with your equipment. Always consult a qualified FANUC service technician and refer to the official FANUC documentation for your specific system model before performing any diagnostic or repair procedure. However, when it persists for an unusually long
The message "FANUC STARTING SYSTEM SOFTWARE PLEASE WAIT" appears during stage . It indicates that the Boot Monitor has successfully handed over control to the System Software loader, but the loader is stuck—unable to complete the transition to the operational CNC state.
What is the exact model number? (e.g., 0i-MD, 18i-TB, 31i-B)
If you see a number or letter, consult your FANUC Maintenance Manual. For example, an "E" might indicate a system error, while a "C" might indicate a graphic module issue. Step 3: Access the Boot System Screen
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