Code M01-1030: Synchronization mismatch
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Synchronization mismatch 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 Different M codes were each comm anded as synchronization M code in each of the two part systems. Synchronization with the "!" code was commanded in another part system during M code synchronization. Synchronization with the M code was commanded in anoth er part system during synchronization with the "!" code. Remedy Correct the program so that the M codes match. Correct the program so that the same synchronization codes are commanded. Multiple C axes select invalid 1031 Details The "C axis selection" signal has been changed when the multiple C axes selection is not available. The selected axis by the "C axis selection" signal c annot be controlled for the multiple C axes selection. Remedy Correct the parameter se ttings and program. Tap retract Sp select illegal 1032 Details Tap retract has been executed with a diff erent spindle selected. Cutting feed is in wait state until synchroniza- tion is completed. Remedy Select the spindle for which tap cycle was halted before turning ON the "tap retract" signal. Sp-Sp polygon cut interlock 1033 Details Cutting feed is in wa it state until synchroni zation is completed. Remedy Wait for the synchro nization to end. Mixed sync ctrl prmtr illegal 1034 Details There is a mistake in the settings of mixed control axis parameters (crsax [1] to [8]). Mixed control was attempted within one an d the same part system. Any of the parameter settings is disabling mixed control. Remedy Check the parameter settings for mixed synchronization control. Mixed sync ctrl disable modal 1035 Details Mixed synchronization control was commanded for a part system in which mixed synchronization control is dis- abled as shown below. During nose R compensation mode During pole coordinate interpolation mode During cylindrical interpolation mode During balance cut mode During fixed cycle machining mode During facing turret mirror image During constant surface speed control mode During hobbing mode During axis name switch During interference check III alarm (i nterference detection, interference alarm area intrusion or interfer- ence warning area intrusion) An axis was transferred to anothe r part system, and mixed control was attempted with the part system's max- imum number of control axes exceeded. An axis was removed from the part system, and mixed control was attempted with the part system's number of axes zero. Another axis exchange was attempted to the axis whic h was already transferred to another part system for mixed control. Mixed control was attempted with an axis of a part system not in automatic operation. Remedy Correct the program.
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 M01-1030 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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