Code M01-0101: No operation mode
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical No operation mode 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 [No operation mode] No operation mode [Aux ax no operation mode] The operation mode is not designat ed, or the operation mode was changed during axis movement. Remedy [No operation mode] Check for any broken wires in the input mode signal wire. Check for any failure of the MODE SELECT switch. Correct the sequence program. [Aux ax no operation mode] Correctly designate the operation mode.
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 M01-0101 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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