Siemens SIMATIC S7-1500 Manual page 20

Product overview
3.2 Applications of the S7-1500 CPUs
can simultaneously perform more tasks, the complexity of functions is reduced and the time
required for implementation decreased.
You can reuse existing C/C++ algorithms. To continue using existing technological know-how,
you can integrate the existing C/C++ code via the Open Development Kit:
• In the runtime environment of the CPU or
• As C/C++ Runtime applications into the SIMATIC S7-1500 MFP C/C++ Runtime
Once you integrate the C/C++ sources, you can execute them on the CPU.
You can find a description of the Open Development Kit in the SIMATIC S7-1500 ODK 1500S
(https://support.industry.siemens.com/cs/ww/en/ps/13914/man) Programming and Operating
Manual, V2.5 and higher, edition 12/2017. The sections that describe the CPU function library
for CPU Runtime and the C/C++ Runtime applications apply to the CPU 1518-4 PN/PN/DP MFP.
The work memory and the load memory of the CPU 1518-4 PN/DP MFP are divided as follows:
Work memory for:
• The STEP 7 user program
• for CPU function library for CPU Runtime
• for C/C++ Runtime applications
Load memory for:
• the STEP 7 user program including CPU function library for CPU Runtime
• for C/C++ Runtime applications
Security Integrated
In conjunction with STEP 7, each CPU offers password-based know-how protection against
unauthorized reading out or modification of the program blocks.
Copy protection provides reliable protection against unauthorized reproduction of program
blocks. With copy protection, individual blocks on the SIMATIC memory card can be tied to its
serial number so that the block can only be run if the configured memory card is inserted into
the CPU.
In addition, you can assign various access rights to different user groups in the controller
using four different authorization levels.
Improved manipulation protection allows changed or unauthorized transfers of engineering
data to be detected by the controller.
The use of an Ethernet CP (CP 1543-1) provides you with additional access protection
through a firewall or possibilities to establish secure VPN connections.
Design and handling
All CPUs of the SIMATIC S7-1500 product series feature a display with plain text information.
The display provides the user with information on the order numbers, firmware version, and
serial number of all connected modules. In addition, the IP address of the CPU and other
network settings can be adapted locally without a programming device. Errors messages are
immediately shown on the display in plain text. When performing servicing, you can
minimize plant downtimes by quickly accessing the diagnostics messages. Detailed
information about this and a multitude of other display functions is available in the SIMATIC
S7-1500 Display Simulator
(https://support.industry.siemens.com/cs/ww/de/view/109761758/en).
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CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Equipment Manual, 11/2022, A5E40882737-AC