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Siemens SINUMERIK Controller
Servo/Axis · Intermediate · 30-120 minutes
Siemens 840D 6583 - NC system memory full
Alarm 6583 indicates the NCK DRAM file system has exhausted available memory in the system area, preventing new NC program blocks or data from being loaded into the control's memory. This typically occurs when the part program exceeds available NCK memory, excessive tool offset data is stored, or system-level DRAM is not properly allocated via MD parameters.
6583
Siemens 840D 6583 - NC system memory full
NC system memory full
Siemens SINUMERIK alarm 6583: NC system memory full. This alarm indicates a fault or error condition on the SINUMERIK 840D control. Refer to the Siemens SINUMERIK alarm documentation for the complete description and remedy.
Root Cause Summary
Alarm 6583 indicates the NCK DRAM file system has exhausted available memory in the system area, preventing new NC program blocks or data from being loaded into the control's memory. This typically occurs when the part program exceeds available NCK memory, excessive tool offset data is stored, or system-level DRAM is not properly allocated via MD parameters.
Safety
- Refer to Siemens documentation
- Ensure qualified technician performs repairs
Causes and Fixes
- 1
In NCK menu, navigate to Diagnostics > Memory to view current DRAM utilization percentage. Check if NCK program memory usage exceeds 85-90% threshold.
- 2
Verify MD10100 and MD10101 values in Parameter editor (HMI: Maintenance > Parameters > Machine Data). Note current allocation and compare against actual program + offset requirements.
Increasing MD10100 may require reallocation of PLC memory (MD10102). Consult control documentation for total DRAM budget.
- 3
Split large part programs into smaller modules using M98/M99 subroutine calls or separate the program into sequential operations. Store only active tool offsets in the system area; archive unused offsets to external storage.
- 4
If modification is required, increase MD10100 in 256 KB increments, recompile NCK via online update, and verify alarm clears after system restart.
Insufficient DRAM may prevent the control from restarting; consult hardware documentation for total available DRAM.
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