Siemens SIMATIC S7-1500 Manual page 17

You can use C/C++ Runtime applications to implement parallel processes to the STEP 7
user program, for example, for pre-processing or transmitting data via Industrial Ethernet. A
CPU 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. In order 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 in 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 S7-1500 Programming and
Operating Manual Open Development Kit 1500S, as of V2.5 Edition 12/2017. The sections
that describe the CPU function library for CPU Runtime and die C/C++ Runtime applications
apply to CPU 1518-4 PN/DP MFP.
CPU 1518-4 PN/DP MFP has additional memory for C/C++ code and data:
Work memory for:
● The STEP 7 user program
● The CPU function library for CPU Runtime
● C/C++ Runtime applications
Load memory for:
● The STEP 7 user program including CPU function library for CPU Runtime
● C/C++ Runtime applications
Performance segments of compact CPUs
The compact CPUs can be used for smaller to mid-range applications and have an
integrated analog and digital on-board I/O as well as integrated technology functions. The
following table shows the specific properties of the Compact CPUs.
Integrated analog inputs/outputs
Integrated digital inputs/outputs
High-speed counters
Frequency meter
Period duration measurement
Pulse width modulation (PWM output)
Pulse Train Output (PTO output)
Frequency output
CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Manual, 12/2017, A5E40882737-AA
CPU 1511C-1 PN
5 inputs/2 outputs
16 inputs/16 outputs
6
6 (max. 100 kHz)
6 channels
max. 4 (up to 100 kHz)
max. 4 (up to 100 kHz)
up to 100 kHz
Product overview
2.1 Applications of the S7-1500 CPUs
CPU 1512C-1 PN
5 inputs/2 outputs
32 inputs/32 outputs
6
6 (max. 100 kHz)
6 channels
max. 4 (up to 100 kHz)
max. 4 (up to 100 kHz)
up to 100 kHz
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