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Access Machine Data Browser

Navigate to Commissioning → Machine Data → Axis Data and select the affected axis to review all MD parameters.

Use the MD search function to quickly locate specific parameters by number

Verify Critical Axis Parameters

Check MD30200 (axis type), MD32000 (max velocity), MD32300 (position loop gain), and MD31000 (reference point offset) for valid ranges and proper data types.

Incorrect MD32300 values can cause servo instability

Validate Parameter Consistency

Ensure MD30130 (axis name) matches the configured channel assignment and MD30240 (axis coupling) references exist if configured.

Reset and Restart NCK

After correcting invalid parameters, perform NCK Reset via Diagnostics → Service → NCK → Reset to reload machine data.

Check Drive Assignment Table

Navigate to Commissioning → Drive → Drive Assignment and verify MD36300 entries match physical drive configuration and PROFIBUS/PROFINET addresses.

Use HW Config to verify actual drive addresses match MD36300 assignments

Verify Drive Communication

Check Diagnostics → Drive → Drive Status to ensure all assigned drives are communicating properly with the NCK.

Validate Axis-Drive Mapping

Confirm each axis has a unique drive assignment in MD36300 and no duplicate assignments exist across multiple axes.

Duplicate drive assignments will cause immediate axis faults

Update Drive Configuration

Correct any mismatched drive assignments and perform a complete power cycle to reinitialize the drive communication.

Review Channel Configuration

Access Commissioning → Channel → Channel Data and verify MD20070 axis name assignments match the configured axis MD30130 names.

Check Axis Slot Allocation

Verify MD10000 (axis slot configuration) matches the physical NCK hardware configuration and available axis slots.

Use NCK hardware diagnostics to confirm actual slot population

Validate Channel Axis Count

Ensure MD20080 (number of channel axes) matches the actual number of axes assigned to each channel in MD20070.

Synchronize Configuration

Update channel and axis assignments to maintain consistency between MD20070, MD30130, and physical hardware configuration.

Check Archive Integrity

Navigate to Commissioning → Startup → Archive and run archive consistency check to identify corrupted machine data blocks.

Always backup current settings before archive operations

Restore from Backup

Load a known good machine data backup from CF card or network location via Commissioning → Startup → Archive → Load Archive.

Verify Battery Status

Check NCU battery voltage in Diagnostics → Hardware → NCU Status to ensure SRAM data retention capability.

Replace NCU battery if voltage drops below 3.0V

Rebuild Machine Data

If no backup exists, manually reconfigure axis parameters using commissioning documentation and create new archive after validation.