How It Works - Siemens CPU 1518-4 PN/DP ODK Manual

Product overview

2.2 How it works

2.2 How it works
Principle of operation
The CPU contains the operating system and executes the user program. The user program
is located on the SIMATIC memory card and is processed in the work memory of the CPU.
CPU 1518-4 PN/DP ODK allows you to integrate C/C++ functions created with the SIMATIC
S7-1500 ODK in the user program in addition to the user program created directly with STEP
7.
The connection to the process is centralized or distributed via PROFINET or PROFIBUS with
I/O modules.
The PROFINET interfaces on the CPU allow simultaneous communication with PROFINET
devices, PROFINET controllers, HMI devices, programming devices, other controllers and
other systems. CPU 1518-4 PN/DP ODK supports operation as an IO controller and I-device.
Similarly to the PROFINET interface, the PROFIBUS interface available on the CPU allows
communication with other devices. When you use the interface as PROFIBUS DP interface,
the CPU on the PROFIBUS DP also assumes the role of a DP master.
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CPU 1518-4 PN/DP ODK (6ES7518-4AP00-3AB0)
Manual, 09/2016, A5E35681108-AA