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Check NCK memory status

Navigate to HMI > Diagnostics > NCK > Memory and check available memory space. Look for memory utilization above 90%.

Use MD18210 $MN_MM_NUM_FILES_MAX to check maximum file limit

Clear unnecessary files

Delete old part programs, unused subroutines, and temporary files via HMI > Program Manager. Remove files from _N_DEF_DIR and _N_SPF_DIR if not needed.

Always backup critical programs before deletion

Perform memory defragmentation

Execute NCK reset with memory reorganization via HMI > Startup > NCK > Reset NCK with 'Reorganize memory' option selected.

This process can take 10-15 minutes depending on memory size

Verify drive data save

Attempt to save drive parameters again through HMI > Commissioning > Drive > Save to NCK and monitor for alarm clearance.

Check commissioning status

Navigate to HMI > Commissioning > Drive and verify if any axes show 'Commissioning active' status or if MD30130 $MA_CTRLOUT_TYPE shows temporary values.

Look for yellow indicators in the drive status display

Complete drive optimization

Finish the active commissioning sequence by running speed controller optimization and position controller tuning for all affected axes.

Ensure machine is properly secured before running optimization routines

Exit commissioning mode

Select 'Complete Commissioning' in the drive commissioning menu and confirm parameter acceptance to transfer temporary values to permanent storage.

Use 'Save and Activate' to ensure parameters are written to NCK memory

Check disk space and status

Access HMI > Diagnostics > HMI > System Info and check available disk space on both NCK and HMI partitions. Verify less than 95% utilization.

Use Windows Explorer to check C: and D: drive space if HMI access is available

Verify write permissions

Check file system permissions in the SINUMERIK data directories and ensure the NCK service has write access to configuration folders.

Incorrect permission changes can cause system instability

Test disk integrity

Run disk check utility from HMI > Service > System > Disk Check to identify and repair any file system errors or bad sectors.

Schedule disk check during maintenance window as it requires system restart

Clear temporary files

Delete temporary files from Windows temp directories and SINUMERIK log files older than 30 days to free up disk space.

Check parameter consistency

Navigate to HMI > Diagnostics > NCK > Parameter and run parameter consistency check. Look for red error indicators or dependency violations.

Focus on MD32000-MD32999 drive-specific parameters for conflicts

Verify motor and encoder data

Check motor parameters MD32200 $MA_MOTOR_POLEPAIRS and encoder settings MD31020 $MA_ENC_RESOL for proper matching and realistic values.

Incorrect motor data can cause dangerous machine behavior

Resolve parameter conflicts

Correct conflicting parameters identified in the consistency check, ensuring proper motor-encoder combinations and valid parameter ranges.

Use SINAMICS Startdrive for complex drive parameter validation

Check DRIVE-CLiQ communication

Navigate to HMI > Diagnostics > Drive and verify all SINAMICS modules show 'Ready' status with green indicators in the topology view.

Look for C01390 or similar DRIVE-CLiQ communication alarms

Verify PROFIBUS/PROFINET status

Check fieldbus communication status in HMI > Diagnostics > Bus Systems and ensure all drive nodes are online with proper cyclic data exchange.

Bus errors can affect multiple axes simultaneously

Reset drive communication

Perform controlled reset of drive communication via HMI > Startup > Drive > Reset Drive Communication and wait for complete initialization.

Allow 30-60 seconds for complete drive topology recognition