231-8320

Access Power Module Configuration

Navigate to MOD function → Machine Parameters → Power section to verify power module table column S values match installed hardware.

Document original settings before any CC controller replacement

Check PIC Communication

Verify PIC microcontroller communication by checking inverter status in the servo diagnostic screens under Test Run mode.

Ensure machine is in safe state before accessing servo diagnostics

Reconfigure Current Range

Set the correct current measurement range in the power module configuration to match the new CC controller specifications.

Cross-reference CC controller part number with Heidenhain power module compatibility charts

Perform System Restart

Execute a complete TNC restart to reinitialize PIC communication and verify configuration changes take effect.

Check motEncCheckOff Parameter

Navigate to MOD → Machine Parameters → Servo section and examine motEncCheckOff parameter, specifically Bit16 status.

Use binary view to clearly see individual bit settings

Verify Power Module Table Column S

Cross-reference the column S values in power module table with the motEncCheckOff Bit16 setting for consistency.

Incorrect parameter changes can affect multiple axes simultaneously

Correct Parameter Setting

Set motEncCheckOff Bit16 to match the intended PIC access configuration: 0 for PIC active, 1 for PIC deactivated.

Validate Configuration

Perform axis reference run to confirm parameter changes resolve the PIC nominal/actual value mismatch.

Isolate Affected Inverter

Identify which specific inverter/axis is generating the alarm through the TNC diagnostic display and servo status screens.

Do not attempt to force axis movement with suspected PIC failure

Test PIC Switching Function

Use TNC servo test functions to attempt manual PIC range switching and monitor for proper response.

Compare PIC response with other functioning axes to confirm failure

Check Inverter LED Status

Examine inverter module LED indicators for fault patterns that indicate PIC microcontroller malfunction.

Plan Inverter Replacement

If PIC switching fails consistently, schedule inverter module replacement as hardware repair is required.

Ensure proper ESD precautions during inverter handling

Backup Current Configuration

Create complete machine parameter backup via MOD → Data Management before making any configuration changes.

Include timestamp in backup filename for version tracking

Compare with Known Good Configuration

Load and compare current power module table settings with documented machine specifications or previous working backup.

Verify machine serial number matches configuration before loading backups

Restore Correct Power Module Settings

Manually correct power module table column S values or restore from verified backup configuration file.

Verify All Axis Configurations

Check all servo axes for consistent power module configuration to prevent similar alarms on other axes.