Please Wait | Fanuc Starting System Software

If you see "SRAM PARITY ERROR" or "BAT ALARM" before the freeze, your SRAM is the prime suspect.

Open the yellow control enclosure on the back of the display or in the electrical cabinet. Safely remove and re-insert the FROM/SRAM module and DIMM modules to clean the pin contacts.

If you reach the "Configuration Menu," select . This bypasses some normal startup checks and may allow you to perform backups or diagnostics. Boot Monitor Mode (BMON) fanuc starting system software please wait

This article provides a deep dive into the "FANUC Starting System Software Please Wait" condition. We will explore the boot architecture of a FANUC CNC (Series 0i, 31i, 30i, 21i, and older 16/18 models), diagnose the root causes, offer step-by-step troubleshooting, and outline preventive maintenance to keep your FANUC systems booting in seconds—not hours.

An INIT START is a powerful procedure. While it often resolves boot issues, it will delete many critical settings stored in the controller's memory, such as robot mastering (position calibration) and machine parameters. Therefore, you must only proceed if you have a complete system backup (including all SRAM and user files) or are prepared to perform a full, manual reconfiguration. If you see "SRAM PARITY ERROR" or "BAT

Turn off the machine, shut off the main factory breaker for 2 minutes, and power it back on. This fully drains residual power from the capacitors.

Select to save your parameters, tool offsets, and part programs. Option B: Restore from a Previous Backup If you reach the "Configuration Menu," select

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If you have a known good backup file (SRAM.FDB or similar) on a memory card: Select from the Boot System menu. Select RESTORE (CARD -> CNC) .