Code M01-0232: Illegal op in 3D tool R comp
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Illegal op in 3D tool R comp 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 An illegal operation (such as manual interrupt) was attempted during 3-dimensional tool radius compensation (tool vertical direction compensation). Remedy Operations such as manual interrupt are disabled while 3-dimensional tool radius compensation (tool ver- tical direction compensatio n) is being performed. Coord select w/o 3D man. Feed 0233 Details Hypothetical coordinate system has be en selected although 3D manual feed is not included in the specifica- tions. Remedy Turn OFF all the 3D manual feed coordinate syst em selection signal s (including MJCT). No spec: Rot center error comp 0240 Details No option of rotation center error compensation is found. Remedy Check the specifications. Rot center err comp incorrect 0241 Details The calculated compensation amount was excessive , thus the amount was clamped to +/- 1mm. Compensation for angle deviation was executed although the preset tool length is not in the height-axis direction. Remedy Check the values of the position deviation and the angle deviation. Check the tool length value. Unable to start measuring err 0245 Details You executed cycle start while measurement of rotation c enter error or workpiece installation error is invalid. Remedy Execute cycle start for one part system that is ready for measurement. Activate memory mode before executing cycle start. Invalid op mode in err measure 0246 Details You switched the operation to any mode other than memo ry during measurement of rotation center error or workpiece installation error. Remedy Switch the operation to memory mode. Manual interruption, automatic operation handle interruptio n, MDI interruption, etc. are invalid during error mea- surement. Execute cycle start after completion or cancel of the measurement. Machining surface operation disabled 0250 Details Machining surface operation (selection, indexing or c ancel) was attempted while the operation is disabled. Remedy Cancel the other modes so that the inclined surface machining command (G68.2), tool axis direction con- trol (G53.1) and the inclined surface machining cancel command (G69) can be issued. Wait until the axes stop completely (until the smoothing for all axes reaches zero). Perform operation search for machining programs. Axs travel n/a in manual index 0251 Details Moving a rotary axis was attempted during manual ma chining surface indexing, when a manual operation mode other than handle mode was selected. Remedy Change the operation mode to a handle mode before carrying out the manual surface indexing.
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 M01-0232 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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