10 NC Start-Up with HMI Advanced
10.4 Memory configuration
The dynamic (DRAM) or static (SRAM) memory available in each case depends
on the hardware configuration of the components used (PCU and MCI board)
and the memory available for SINUMERIK 840Di.
1) DRAM component (main memory) occupied by SINUMERIK 840Di and thus no longer
available for Windows NT.
2) Virtual SRAM resides in main memory (DRAM) during operation of the
SINUMERIK 840Di and retentive on the hard disk of the PCU.
The memory areas of the user data are preset to expedient values during gen-
eral reset of the NC. The size of the individual areas can be set for optimized
utilization of the user memory, e.g. for:
(see Subsection 10.4.2, Page 10-298):
Memory allocation must take place before actual commissioning of the NC,
since all user data are lost when changes to the memory allocation are made
(e.g. parts programs, tool offsets)!
Machine data, setting data and option data are retained after a memory
The MDs for the memory configuration are activated by power ON.
Description of Functions
S7 Memory Configuration
Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition