Heidenhain codes
HeidenhainCommunicationIntermediate30-120 minutes

235-00A6

HEIDENHAIN 235-00A6 - Zwei Umrichter vertauscht

Zwei Umrichter vertauscht

In an HSCI device, two inverters are swapped compared to the configuration. Their port assignments are reversed.

Root Cause Summary

HEIDENHAIN alarm 235-00A6 indicates two drive inverters are swapped at the specified HSCI address compared to the configured setup. The TNC detected a mismatch between the expected drive configuration in the machine parameters and the actual physical connections.

Safety

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

Causes and Fixes

  1. 1

    Access Machine Parameters

    Press MOD key, select 'Machine Parameters' from setup menu, navigate to MP7500 series for hardware configuration.

    Always backup current parameters before making changes using the data backup function.

  2. 2

    Verify Drive Configuration

    Check MP7500.x entries for drive types and HSCI addresses, compare with physical drive installation and cable connections.

    Incorrect parameter changes can cause machine damage - document original settings first.

  3. 3

    Update Configuration Parameters

    Modify MP7500.x parameters to match actual drive positions, or use hardware configuration wizard in setup menu if available.

    Use the diagnostic screen to verify HSCI communication after parameter changes.

  4. 4

    Restart Control System

    Perform controlled shutdown and restart to activate new hardware configuration parameters.

    Ensure all axes are in safe position before restart.

DIY Feasiblehigh confidence

Call a technician if:

  • ·Parameter backup corruption
  • ·Multiple drive hardware failures
  • ·Persistent communication errors after corrections

Prevention

  • Label all HSCI cables clearly
  • Document drive configurations during installation
  • Backup machine parameters regularly
  • Use sequential HSCI addressing

Common Mistakes

  • Changing parameters without backup
  • Ignoring drive serial number verification
  • Assuming cable positions without verification
  • Not checking DIP switch settings after drive replacement

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