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Access Machine Parameters

Press MOD key, select 'Machine Parameters' from the TNC menu, navigate to voltage protection parameters section.

Use the search function in machine parameters by typing 'volt' to quickly locate voltage-related parameters.

Verify ampVoltProtection Value

Locate parameter 'ampVoltProtection' and check its current value against machine documentation specifications.

Document current parameter values before making changes for potential rollback.

Correct Parameter Entry

Enter the correct value as specified in machine manufacturer documentation, typically 0-3 for different protection module types.

Common values: 0=no protection, 1=basic module, 2=advanced module, 3=custom configuration.

Restart Control System

Perform a complete TNC restart to initialize the new parameter value and clear the alarm condition.

Backup Current Parameters

Use TNC file management to create a complete backup of all machine parameters to external storage device.

Always backup parameters before attempting memory restoration procedures.

Restore Default Parameters

Access MOD menu, select 'Service' functions, choose 'Restore machine parameters' to reload factory defaults.

This will reset ALL parameters - ensure you have machine-specific parameter documentation ready.

Reconfigure Voltage Protection

Re-enter the correct ampVoltProtection parameter value and all other machine-specific voltage monitoring settings.

Work systematically through parameter groups to avoid missing critical settings.

Verify System Operation

Perform complete system restart and verify all voltage monitoring functions operate correctly without alarm recurrence.

Identify Installed Hardware

Check the voltage protection module part number in the electrical cabinet and compare with system documentation.

Look for Heidenhain part numbers starting with 'VPM' or similar voltage protection designations.

Verify Parameter Compatibility

Cross-reference the installed module specifications with the required ampVoltProtection parameter value in Heidenhain documentation.

Using incorrect parameter values can disable voltage protection features.

Update Parameter Configuration

Modify ampVoltProtection parameter to match the actual installed hardware configuration.

Consult the voltage protection module installation manual for exact parameter requirements.

Test Protection Functions

Verify voltage protection operates correctly by monitoring system response during normal operation cycles.

Check TNC Software Version

Access MOD menu, select 'System info' to display current TNC software version and build information.

Note both the main version number and any service pack or patch levels installed.

Verify Compatibility Matrix

Check Heidenhain documentation for voltage protection module compatibility with current TNC software version.

Some older TNC versions may not support newer voltage protection modules.

Update TNC Software

Install compatible TNC software version that properly supports the installed voltage protection hardware configuration.

Always backup machine parameters and programs before software updates.

Reconfigure After Update

Re-enter voltage protection parameters using the updated software's parameter structure and verify alarm clearance.