6 Assi
nin
Parameters to the Control and the PLC Pro
ram
6
03.96
6.7 Memory configuration
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 Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
6.7 Memory configuration
The following table shows the hardware configuration of the available NC
CPUs:
D-RAM S-RAM
not
buffered
S-RAM
buffered
FLASH PCMCIA
NCU 570 1.5 MB 0.25 MB 2.25 MB
NCU 571 4 MB 0.5 MB/2.0 MB* 4 MB
NCU 572 8 MB 0.5 MB/2.0 MB* 4 MB
NCU 573 8 MB 0.5 MB/2.0 MB* 4 MB
NCU 573.2 8 MB 2.0 MB 4 MB
NCU 573.2 32 MB* 2.0 MB 4 MB
*) available as an option, see Catalog NC 60.1
The memory areas for user data in the NC are preset to suit most user require-
ments during an NCK general reset. The following areas can be adjusted to
achieve optimum utilization of the available user memory:
S Tool management
S Tool offsets
S User variables
S R parameters
S Compensations (e.g. LEC)
S Protection zones
S Frames
The memory must be sectionalized before commencement of the actual start-up
process because all buffered user data (e.g. part programs, drive data) are lost
when the memory is re-allocated. Machine data, setting data and options are
not erased.
The MDs for the memory configuration are activated by power ON.
Hardware
configuration
Memory areas
Activation
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