SIMATIC S7 - an Overview
1-6
Automation System S7-400 Configuration and Use
A5E0044271 1-02
1.3 An Overview of S7-400 Components
Introduction
In order for the S7-400 to adapt to and fulfill each and every task, a tiered range of
components varying in performance is available for a wide range of functions.
All of these components are matched to one another and can therefore be easily
integrated to form a complete syst em.
Figure 1-1 shows a configuration of an S7-400 with several modules in a rack.
Figure 1-1 An S7-400 configuration
CPU
The CPU is responsible for the control and regulation of the processes. CPUs with
varying performance capability are offered for the S7-400. They differ from one
another in the size of the user memory, the processing speed and number of
interfaces they offer.
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