Siemens SINUMERIK 840D sl Function Manual page 929

Static-user-memory size
The size of the static user memory is defined in machine data:
MD18230 $MN_MM_USER_MEM_BUFFERED
Memory space for passive file system
The memory space for the passive file system has a defined size and is divided into the
following partitions:
Partition
S (Siemens = Control manufacturer)
M (Manufacturer = Machine manufacturer)
U (User = End customer)
E (EXT = External)
Advantage of separation:
This separation into different partitions ensures that a series machine start-up file can be
reloaded onto the NCK even in the event of an NCK software or cycle package upgrade (that
has expanded the area of Siemens cycles).
Size of the partitions:
The size of partitions S and E are preset and cannot be modified.
You can divide the remaining memory available for the passive file system into the partitions
U and M as you see fit. The settings are made with machine data:
MD18352 $MN_MM_U_FILE_MEM_SIZE
(end-user memory for part programs/cycles/files)
MD18353 $MN_MM_M_FILE_MEM_SIZE
(memory size for cycles/files of the machine manufacturer)
The maximum adjustable values depend on:
● The system and thus the memory space available (including an optional memory
● The defined maximum values (see "Detailed MD description")
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
expansion)
15.3 Configuration of the static user memory
Storage of:
Files from the _N_CST_DIR directory (Siemens cycles)
Files from the _N_CMA_DIR directory (Machine-
manufacturer cycles)
Files from the _N_CUS_DIR directory (User cycles, part
programs, workpieces)
External files (e.g., part programs from USB FlashDrive
or CD).
Note:
To avoid naming conflicts with internal part programs,
part programs installed from external data carriers are
stored in a separate directory (_N_EXT_DIR).
S7: Memory configuration
929