Code V03-0015: Output sig. cross check error
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Output sig. cross check 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 The signals output to the safety I/O uni t are unmatched between PLC1 and PLC2. Displays the information of the unit with an error. bit24-27: Unit No. bit0-15: Signal BIT The axes covered by safety function come to a standstill. (*) The unit No. indicates the unit in which an alarm occurs. The channel No. and station No. to which the unit is connected can be confirmed by the following parame- ters. Channel No.: #51501 + 10 × (Unit No. - 1) Station No.: #51502 + 10 × (Unit No. - 1) Remedy Check the user safety sequence to make sure the output signal control circuit is correct. Set tolerable time more than 300ms, when an output signal is controlled with 100ms timer. NC unit may be faulty. Replace the NC unit.
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 V03-0015 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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