100101

Check NCK memory utilization

Access HMI → Diagnostics → Service → NCK → Memory and review dynamic memory usage statistics.

Look for memory fragmentation indicators in the detailed memory map

Analyze current NC program complexity

Review active part program for excessive G-code density, particularly G02/G03 circular interpolations and polynomial interpolations (G06.2).

Backup current program before making modifications

Adjust interpolation parameters

Modify MD20482 (LOOKAH_BUFF_SIZE) and MD20484 (LOOKAH_NUM_BLOCKS) to optimize memory allocation for interpolation buffering.

Optimize program structure

Reduce subroutine nesting depth and eliminate unnecessary coordinate transformations to minimize memory overhead.

Verify NCK memory configuration

Check MD18210 (MM_NUM_USER_MACROS) and MD18220 (MM_NUM_USER_FRAMES) for excessive allocations reducing available dynamic memory.

Review servo memory allocation

Examine MD36700 (AX_SERVO_BUFFER_SIZE) settings for all configured axes to ensure appropriate buffer sizing.

Adjust memory distribution

Modify MD18050 (MM_NCK_MEM_DYN_GRAN) to optimize dynamic memory granularity and reduce fragmentation.

Increase granularity in steps of 1KB while monitoring system performance

Restart NCK to apply changes

Perform NCK reset via HMI → Commissioning → System → Reset → NCK Reset to activate new memory parameters.

Ensure all programs are saved before NCK reset

Identify active user functions

Access HMI → Program Manager → User Cycles and document all active custom cycles and their memory usage patterns.

Monitor memory consumption over time

Use SINUMERIK Operate diagnostic functions to track dynamic memory usage during execution of suspect user functions.

Disable suspect functions temporarily

Systematically disable user-defined cycles and monitor for alarm recurrence to isolate problematic code.

Review function programming

Examine custom cycle code for proper variable deallocation and ensure all dynamic arrays are properly released.

Pay special attention to string variables and dynamic arrays in user cycles

Perform hardware memory test

Execute extended memory test via HMI → Diagnostics → Service → Hardware → Memory Test during next maintenance window.

Check system event log

Review NCK alarm buffer and Windows event logs for memory-related hardware errors or ECC corrections.

Verify memory module seating

Power down system and reseat all NCU memory modules, ensuring proper connection and locking mechanisms.

Follow proper ESD procedures and power-down sequence before handling memory modules

Document memory module information

Record memory module part numbers and serial numbers for potential replacement if hardware test fails.