Siemens SIMATIC NET CP 443-1 Advanced, Руководство пользователя

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Performance data
2.11 Memory organization in the CP 4431 Advanced
CP 443-1 Advanced (GX30)
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Manual, 03/2019, C79000-G8976-C256-05
2.11 Memory organization in the CP 4431 Advanced
The data areas of the CP 4431 Advanced are organized as follows:
Figure 2-4 Data areas of the CP
Meaning of the memory areas
● Flash area in the CPLUG (nonvolatile memory):
The flash area allows data to be stored and retained if there is a power down.
Since the number of times it is possible to write to this area is restricted, you should avoid
repetitive write operations to this area, when such operations are necessary, write to
RAM.
Note
The flash area of the file system allows a limited number of write cycles (approximately
100 000). You should therefore avoid writing data cyclically.
If you write temporary data often, you should switch to the RAM file system located in the
/ram subfolder. The files of the RAM file system (/ram) are lost if there is power down.