Siemens SINUMERIK codes
Siemens SINUMERIKProgram/G-codeIntermediate30-120 minutes

101142

Siemens 840D 101142 - MDx146< MDx142

MDx146< MDx142

Siemens SINUMERIK operator message 101142: MDx146< MDx142. This is an informational message from the SINUMERIK control indicating a system status or operation result that may require operator action.

Root Cause Summary

Alarm 101142 indicates a machine data configuration error where MD 146 (maximum number of axes) is set to a value less than MD 142 (number of geometry axes). This creates a logical conflict as the system cannot have more geometry axes than total axes available. This alarm typically occurs during system configuration, machine data restoration, or after incorrect parameter modifications.

Safety

  • Refer to Siemens documentation
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Enter service mode and navigate to machine data: HMI > Commissioning > Machine Data.

  2. 2

    Check value of MD 146 (max axes) and MD 142 (geometry axes) for the affected channel. Record both values.

  3. 3

    Increase MD 146 to at least equal or greater than MD 142. Typically MD 146 should be set to the total number of configured axes (e.g., 5 for 5-axis machine).

    Ensure new value matches actual hardware configuration and licensed axes count.

  4. 4

    Perform NCK reset (Power On) to activate changes. Verify alarm clears and all axes are properly recognized.

Service Recommended confidence

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