Code V51-0007: SBT warning 6
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical SBT warning 6 alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Details The axis movement amount exceeded the tolerable va lue in the test pattern 3 of motor brake test. Displays the name of axis with the error. Remedy Move the axis to safe position by manual operation. Take corrective action to the brake after the power OFF. Then turn power ON and carry out the brake te st again. This alarm will be cancelled when the test completes normally. This alarm can be cancelled with the safety reset signa l. The external brake SBT incomplete signal (SBT- NFEXm), however, remains ON. When this alarm is cancelled with the safety reset signal, however, the motor brake SBT incomplete signal (SBTNFMOm) remains ON.
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code V51-0007 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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