230-04ED

Access Current Controller Configuration

Navigate to MOD function → Machine Parameters → CfgCurrentControl to examine current controller parameter settings.

Use Ctrl+F to quickly search for 'iCtrlProp' and 'iCtrlInt' parameters

Identify Parameter Conflict

Check if both legacy parameters (iCtrlPropGain, iCtrlIntGain) and D/Q parameters (iCtrlPropGainD/Q, iCtrlIntGainD/Q) have non-zero values configured.

Document existing values before making changes for rollback purposes

Select Parameter Set

Choose either legacy single-gain parameters for older servo drives or D/Q axis parameters for modern vector-controlled drives based on your servo amplifier specifications.

Modern Heidenhain servo amplifiers typically require D/Q axis parameterization

Clear Conflicting Parameters

Set the unused parameter set to zero values and save the machine parameters with PGM MGT → Save Machine Parameters.

Incorrect current controller settings can cause servo instability or damage

Verify D/Q Parameter Completeness

In CfgCurrentControl, ensure all four D/Q parameters have appropriate non-zero values: iCtrlPropGainD, iCtrlIntGainD, iCtrlPropGainQ, and iCtrlIntGainQ.

D and Q gain values are typically identical for most servo applications

Clear Legacy Parameters

Set iCtrlPropGain and iCtrlIntGain to zero to eliminate parameter mixing conflict.

Ensure D/Q parameters are correctly set before clearing legacy values

Apply Servo Drive Specifications

Configure D/Q gain values according to servo amplifier documentation or use Heidenhain servo optimization wizard if available.

Start with manufacturer recommended values and fine-tune during servo commissioning

Check Software Version Compatibility

Verify TNC software version in Setup → General → Software Version and confirm current controller parameter format requirements for this version.

TNC software versions after 340.49x typically require D/Q axis parameterization

Review Parameter Backup Source

Examine the source of restored parameters to determine if they originated from older TNC software using legacy current controller format.

Parameter backups from different software versions may contain incompatible parameter sets

Perform Clean Parameter Migration

Manually configure current controller parameters appropriate for current TNC software version, clearing all conflicting parameter values.

Use Heidenhain StateMonitor to verify servo performance after parameter migration

Identify Servo Amplifier Type

Check servo amplifier model numbers and control method specifications to determine if single-gain or D/Q axis current control is required.

Heidenhain AE/AK servo amplifiers typically use D/Q control, while older analog drives use single-gain

Match Parameter Format to Hardware

Configure current controller parameters in CfgCurrentControl to match servo amplifier requirements - use legacy parameters for analog drives, D/Q parameters for digital vector drives.

Mismatched current control parameters can cause servo oscillation or thermal damage

Validate Servo Communication

Use TNC diagnostic functions to verify proper servo amplifier communication and current controller response after parameter correction.

Monitor servo following error and current consumption during test movements to confirm proper operation