Heidenhain codes
HeidenhainSafetyIntermediate30-120 minutes

330-003A

HEIDENHAIN 330-003A - No authorization for testing

No authorization for testing

The axis cannot be tested in the current safety operating mode. A different SOM mode may be required.

Root Cause Summary

HEIDENHAIN alarm 330-003A occurs when attempting to perform axis testing functions while the machine is operating in safety-related mode SOM_1. This safety interlock prevents potentially dangerous axis movements during diagnostic procedures when safety systems are active.

Safety

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

Causes and Fixes

  1. 1

    Check Current Operating Mode

    Press MOD key and navigate to Operating Modes menu to verify current SOM status and safety system state.

    SOM_1 indicator will be displayed in the status bar when active

  2. 2

    Exit Safety Mode

    Navigate to MOD > Machine Parameters > Safety and disable SOM_1 mode if testing is required and machine is in safe condition.

    Only disable safety mode when machine area is clear and all safety procedures are followed

  3. 3

    Verify Safety Circuit Status

    Check all E-stops, safety doors, and light curtains are in normal operating state before attempting axis tests.

    Use PLC status display to verify all safety inputs are satisfied

DIY Feasiblehigh confidence

Call a technician if:

  • ·Machine parameter modifications required
  • ·Safety system configuration changes needed
  • ·Persistent authorization issues after following all steps

Prevention

  • Establish proper user access procedures
  • Document authorized testing procedures
  • Regular safety system verification
  • Maintain current user authorization matrix

Common Mistakes

  • Attempting to bypass safety systems
  • Using incorrect user credentials
  • Not checking safety circuit status before testing
  • Modifying machine parameters without proper authorization

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