The Simatic Memory Card - Siemens S7-1500 Function Manual

Memory areas and retentive memory
2.1 Memory areas
Load memory
Load memory is non-volatile memory for code blocks, data blocks, technology objects and
the hardware configuration. This load memory is located on the SIMATIC memory card.
STEP 7 transfers the project data from the programming device to the load memory.
You can copy additional data (e.g. HMI backups and other files) to the SIMATIC memory
card using the web server or Explorer. This data can then be found in the load memory on

the SIMATIC memory card.

Note
An inserted SIMATIC memory card is required to operate the CPU.
Load memory: CPU 1518-4 PN/DP MFP and CPU 1518F-4 PN/DP MFP
On these CPUs additional memory space is used in the load memory by:
● Linux runtime, which runs in parallel with the CPU runtime
● C/C++ runtime applications
● Files that are needed for C/C++ runtime applications
● CPU function libraries
Note
CPU runtime
In the context of the CPU 1518-4 PN/DP MFP and the CPU 1518F-4 PN/DP MFP as well as
the Open Development Kit (ODK), the term "CPU runtime" has the following meaning:
The CPU runtime is the runtime environment in which a CPU runtime application can be
executed. CPU 1518-4 PN/DP MFP and CPU 1518F-4 PN/DP MFP run a Linux runtime in
parallel with the CPU runtime. The Linux runtime is the runtime environment for applications
that are executable in Linux, e.g. C/C++ runtime applications.
For additional information on the CPUs, refer to the CPU 1518-4 PN/DP MFP
(https://support.industry.siemens.com/cs/ww/en/view/109749061) manual and the
CPU 1518(F)-4 PN/DP MFP
(https://support.industry.siemens.com/cs/ww/en/view/109756478) product information. You
can find information on creating C/C++ runtime applications in the
SIMATIC S7-1500 ODK 1500S
(https://support.industry.siemens.com/cs/ww/en/view/109752683) manual.
14
Structure and Use of the CPU Memory
Function Manual, 10/2018, A5E03461664-AC