231-C2B0

Access Machine Parameters

Press MOD key, select 'Machine Parameters', navigate to CfgAxisHardware section using the parameter tree.

Use Ctrl+F to quickly search for 'analogOutput' parameter

Verify analogOutput Parameter

Check the analogOutput parameter value for the affected axis. Verify the channel number matches available PWM outputs on your TNC hardware (typically 0-7 for standard configurations).

Do not modify parameters without proper machine documentation

Cross-Reference Hardware Configuration

Compare the parameter setting with the actual I/O board configuration in your TNC cabinet. Check CfgHardware->ioBoards parameters to confirm available analog outputs.

Document current settings before making changes

Correct Parameter Value

Set the analogOutput parameter to a valid PWM channel number that exists on your hardware configuration, then perform a control restart.

Incorrect PWM assignment can cause servo instability

Check Drive Documentation

Verify the servo drive's analog input specifications (±10V, 0-10V, PWM frequency requirements) against the TNC's PWM output configuration.

Most modern drives use ±10V differential inputs

Examine CfgAxisHardware Settings

Navigate to CfgAxisHardware->pwmOutputType parameter and verify it matches your drive's input type (typically 'ANALOG_BIPOLAR' for ±10V drives).

Mismatched signal types can damage drive inputs

Validate Signal Scaling

Check CfgAxisHardware->analogOutputScale parameter to ensure proper voltage scaling for your drive's input range.

Standard scaling is typically 10000 for ±10V range

Test Configuration

After correcting the interface parameters, perform a controlled axis movement test to verify proper PWM output functionality.

Start with low feed rates during initial testing

Backup Current Parameters

Create a complete parameter backup via MOD->Data Backup->Machine Parameters before attempting any restoration procedures.

Save backup to external USB device for safety

Reset Affected Parameter Group

Navigate to CfgAxisHardware section and reset only the analogOutput related parameters to default values using the 'Reset to Default' function.

Resetting parameters will require reconfiguration of axis settings

Restore from Known Good Backup

If available, restore the CfgAxisHardware parameters from a previously saved working configuration backup.

Compare timestamps to ensure you're using the most recent working backup

Perform Parameter Validation

Use the TNC's built-in parameter validation function (MOD->Diagnostics->Parameter Check) to verify database integrity after restoration.

Full control restart required after parameter restoration

Access Hardware Diagnostics

Navigate to MOD->Diagnostics->Hardware Status to check the status of analog output channels and I/O board health.

Look for red status indicators on PWM output channels

Perform I/O Test

Use the built-in I/O test function to manually activate the PWM output and measure voltage at the drive connection with a multimeter.

Ensure drive is disconnected during voltage measurements

Check Cable Connections

Inspect all analog output cable connections between TNC and servo drive for loose connections, damaged wires, or corrosion.

Use contact cleaner on connector pins if corrosion is present

Document Hardware Failure

If hardware failure is confirmed, document the failed I/O board part number and contact Heidenhain service for replacement procedures.

I/O board replacement requires factory calibration