Code M01-0051: Synchronous error excessive
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Synchronous error excessive 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 synchronization error of the master and slave ax es exceeded the allowable value under synchronous con- trol. A deviation exceeding the synchronization error limit va lue was found with the synchronization deviation detec- tion. Remedy Select the correction mode and move one of the axes in the direction in which the errors are reduced. Check the parameter "#2024 synerr". Increase the allowable value or reset it to "0" (check disabled). When using simple C-axis synchronous control, set the contents of the R2589 register to "0".
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 M01-0051 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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