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
In rare cases, a short on a remote I/O unit (ex: FANUC I/O Link, Profibus, or DeviceNet) can feed noise back into the backplane bus. During system software initialization, the CNC polls connected devices. If a device does not respond correctly, the boot process waits indefinitely. fanuc starting system software please wait
If you reach the "Configuration Menu," select CONTROLLED START. This bypasses some normal startup checks and may allow you to perform backups or diagnostics. Boot Monitor Mode (BMON) The message "Starting system software