Code 230-01BF: Encoder type not permitted for axis (%2)
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Encoder type not permitted for axis (%2) 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
[Cause of error] An impermissible combination of Axes->PhysicalAxes->CfgAxis->axisHw and Axes->ParameterSets->CfgAxisHardware->posEncoderType is configured. Permissible combinations are: axisHw = InOutCC CC422 - Motor encoder and all position encoders connected to MC CC424 - Motor encoder and all position encoders connected to CC CC520 - Motor encoder and all position encoders connected to CC axisHw = AnalogMC All position encoders connected to MC axisHw = AnalogCC All position encoders connected to CC axisHw = DisplayMC All position encoders connected to MC axisHw = DisplayCC All position encoders connected to CC axisHw = ManualMC All position encoders connected to MC axisHw = ManualCC All position encoders connected to CC axisHw = ProfiNet Motor encoder and all position encoders connected to ProfiNet [Error correction] Check the configuration
Source: HEIDENHAIN NC Error Messages — TNC7/640/620/320/128, CNC PILOT 640, MANUALplus 620 (10/2023)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Heidenhain TNC Series CNC Alarms
Heidenhain controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 230-01BF on the TNC Series CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Heidenhain's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 4497 Heidenhain TNC Series CNC codes.
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