Code 231-95B0: Faulty parameterization in CfgAxisCoupling %1 (info:
Issue Description & Safety Warning
The Heidenhain TNC Series CNC has triggered a critical Faulty parameterization in CfgAxisCoupling %1 (info: 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
%4) [Cause of error] The parameterization for the axis coupling is faulty. The additional data "Info" gives more precise information: Info = 1: There is no valid master axis for the indicated slave axis Info = 2: The master axis assigned for the indicated slave axis is not active Info = 3: An AdvancedTorque slave is simultaneously parameterized as an AdvancedTorque master Info = 4: An AdvancedTorque slave is simultaneously parameterized as a Torque master or an AdvancedPosition master [Error correction] Info = 1: Check the CfgAxisCoupling-masterAxis parameter Info = 2: Check the CfgAxisCoupling-masterAxis parameter and the CfgAxis-axisMode or testMode parameter of the master axis Info = 3: Check the CfgAxisCoupling-masterAxis parameter of all active axes Info = 4: Check the CfgAxisCoupling-masterAxis parameter of all active axes
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 231-95B0 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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