Siemens SIMATIC S7-1500 Manual page 30

Product overview
2.3 Firmware functions
Mass storage concept
Keep in mind the following information on the memory locations on the SIMATIC memory
card:
● The following C/C++ Runtime containers are located in the "/CppEnv1.MFP" directory on
the SIMATIC memory card and are mounted in the file system in Linux as described:
– System.img (6 MB) → mount point: "/etc/mfp" (system files)
– User.img (50 MB) → mount point: "/home" (home directory of the user, for
– Data.img (200 MB) → mount point: "/var/userdata" (e.g. log data)
● RAM disk (max. 256 MB) → mount point: "/var/volatile"
You can find all the information needed for creating C/C++ Runtime applications in the ODK
manual (https://support.industry.siemens.com/cs/ww/en/view/109249838)
Work memory for C/C++ Runtime
The RAM is 1 GB including the RAM disk.
Performing bulk operations
To use the same C/C++ Runtime application for other CPUs, transfer the C/C++ Runtime
application to the home directory. The home directory is located in the "User.img" file on the
SIMATIC memory card.
To use the C/C++ Runtime application on other CPUs, copy the "User.img" file to the
corresponding SIMATIC memory cards.
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C/C++ Runtime application, for example)
CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Manual, 12/2017, A5E40882737-AA