Heidenhain codes
HeidenhainSystemIntermediate30-120 minutes

900-0BD0

HEIDENHAIN 900-0BD0 - Old parameters of input form removed

Old parameters of input form removed

This error condition indicates old parameters of input form removed. The control has detected an issue that requires attention before normal operation can resume.

Root Cause Summary

Alarm 900-0BD0 occurs when the TNC control detects that an input form contains more parameters than the current software version supports, typically after a software downgrade or when loading older parameter files. The system automatically removes excess parameters to maintain compatibility.

Safety

  • Refer to Heidenhain service manual
  • Ensure qualified technician performs repairs

Causes and Fixes

  1. 1

    Check software version compatibility

    Access MOD function and verify current software version against the parameter file version in Setup General.

    Document software versions before any upgrades or downgrades

  2. 2

    Review removed parameters

    Check the alarm log details to identify which specific parameters were removed from the input form.

    Do not ignore removed parameters as they may affect machining operations

  3. 3

    Recreate missing parameters

    Manually re-enter the removed parameters using current software-compatible parameter structure in Setup Machine Parameters.

    Save parameter backup files after each successful configuration

  4. 4

    Validate parameter functionality

    Test all machine functions to ensure removed parameters haven't affected critical operations like spindle control or axis movement.

DIY Feasiblehigh confidence

Call a technician if:

  • ·Parameter restoration fails repeatedly
  • ·Critical machine functions affected
  • ·Memory errors persist after cleanup

Prevention

  • Always backup parameters before software changes
  • Document parameter configurations thoroughly
  • Test parameter files on non-production systems first
  • Maintain version-specific parameter libraries

Common Mistakes

  • Ignoring removed parameters without verification
  • Restoring parameters without checking software compatibility
  • Not documenting parameter changes
  • Using parameter files from different machine types

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Always verify with your machine manual or a certified technician before performing service procedures.