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Siemens SINUMERIK Controller
Program/G-code · Intermediate · 30-120 minutes
Siemens 840D 100301 - Table cannot be fully generated!
SINUMERIK alarm 100301 occurs when the NCK kernel cannot allocate sufficient memory to generate internal lookup tables during system initialization or operation. This typically results from memory fragmentation, excessive program complexity, or corrupted system data requiring immediate attention.
100301
Siemens 840D 100301 - Table cannot be fully generated!
Table cannot be fully generated!
Siemens SINUMERIK message 100301: Table cannot be fully generated!. This is an operator information message from the SINUMERIK control. Note the complete message text as it may contain important parameter values.
Root Cause Summary
SINUMERIK alarm 100301 occurs when the NCK kernel cannot allocate sufficient memory to generate internal lookup tables during system initialization or operation. This typically results from memory fragmentation, excessive program complexity, or corrupted system data requiring immediate attention.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
Check NCK Memory Status
Access HMI → Diagnostics → Service → NCK → Memory and review available NCK memory. Check for fragmentation indicators in memory allocation display.
Memory fragmentation typically shows as small scattered free blocks rather than large contiguous areas.
- 2
Perform NCK Memory Reorganization
Execute NCK reset via HMI → Startup → NCK → Reset NCK. This defragments memory by clearing temporary tables and reorganizing memory allocation.
Save all active programs and offsets before NCK reset as temporary data will be lost.
- 3
Optimize Program Memory Usage
Review active NC programs for excessive subroutine nesting or large variable arrays. Consider splitting complex programs or reducing local variable usage.
Use MD18210 MAX_NUM_OF_PROGRAMS to limit concurrent program loading if memory is constrained.
Call a technician if:
- ·Hardware memory test shows multiple failures
- ·System continues alarming after NCK reset and memory optimization
- ·Backup restoration fails repeatedly
Prevention
- Perform regular NCK memory defragmentation during maintenance windows
- Monitor memory usage trends via HMI diagnostics
- Maintain current system backups before making program changes
- Limit concurrent program loading in memory-constrained systems
Common Mistakes
- Ignoring gradual memory usage increase over time
- Not backing up system before attempting memory parameter changes
- Using non-Siemens memory modules for replacements
- Performing NCK reset without saving critical offset and tool data
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