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03/2006
12.4 Standard system start-up via NC card
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© Siemens AG 2006 All Rights Reserved
SINUMERIK 840D/810D Start-Up Guide (IADC) – 03/2006 Edition
The cycles are located in the flash file system FFS on the NC card in the follow-
ing directories:
_N_CST_DIR Siemens cycles
_N_CMA_DIR Machine manufacturer’s cycles
from software version 6.4:
_N_CUS_DIR User cycles
_N_MPF_DIR Part programs
_N_SPF_DIR Subprograms
_N_WKS_DIR Workpieces
are also provided or loaded by the HMI software.
The objects to be processed from the DRAM are specified by MD 11290:
DRAM_FILESYSTEM_MASK. If the MD is set to 0, then the objects are pro-
cessed from SRAM as standard.
Bit = 0 The files in the directory are processed from SRAM
Bit = 1 The files in the directory are processed from DRAM
Assignment of bits to the directories
Bit 0 Siemens cycles, CST directory
Bit 1 Machine manufacturer cycles, CMA directory
Bit 2 User cycles, CUS directory
Bit 3 Part programs, MPF directory
Bit 4 Subprograms, SPF directory
Bit 5 Workpieces, WKS directory
From software version 6.4, you can decide whether the files to be processed
from the DRAM should be backed up to the Flash file system of the NC card so
that they are available in DRAM once more after the NC is powered on. If you
choose not to do this, they will have to be loaded again from the HMI.
The type of back-up is controlled by MD 11291 : DRAM_FILE-
SYST_SAVE_MASK.
Bit = 0 The files in the directory are not backed up
Bit = 1 The files in the directory are backed up to the Flash file system of
the NC card
Assignment of bits to the directories
Bit 0 Siemens cycles, CST directory
Bit 1 Machine manufacturer cycles, CMA directory
Bit 2 User cycles, CUS directory
Bit 3 Part programs, MPF directory
Bit 4 Subprograms, SPF directory
Bit 5 Workpieces, WKS directory
The default is to back up all cycle directories.
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Selection for
DRAM processing
Backing up to a
background
memory
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