Code L01-0017: Overrun error
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Overrun error 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 CNC received 10 bytes or more data from HOST in sp ite of DC3 (request to stop data transfer) transmission from CNC to the HOST, which terminated the communication. CNC received 10 bytes or more data from HOST during the data transmission from CNC to the HOST. Remedy Check the software in HOST and make sure that the HOST stops transmitting data within 10 bytes after receiving DC3. Correct the software in HOST not to transmit data su ch as a command or header to CNC during receiving a machining program. 10 User PLC Alarms (U) - "xx" in the lower 16 bits of the sub-status 1 indi cates the program No. (0x01 to 0x78(in the hexadecimal form)) - The sub-alarm No. "yy" of sub- status 1 indicates the project No. ("yy" is not displayed when the maximum number of projects is 1) (U), refer to the PLC Development Manual.
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 L01-0017 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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