Thefollowing functions are available:. Theentered data are filed in system data blocks in the CPU. Adjustments via DIP switches becomeunnecessary. Thus, a change of amodule can be made without another parameterization.
The system prevents faulty inputs by offeringonly allowed entry options on the parameter assignment screenforms. Generation of all system data blocks SDBs to be loadedand their complete transmission to all CPUs take placeautomatically — Parameterization of the selected communicationblocks in the customary programming language e.
System diagnostics: System diagnostics offer the user an overview of the status of theautomation system. The display can be in two different forms: — Display of text messages, which can be output directly andquickly.
For CPUs, additional information is displayed: — Causes of malfunction during user program execution. Copy Download Link Copy the download link and paste to your browser. Thefollowing functions are available: — Configuration of the automation system Racks are selectedfrom an electronic catalog and the selected modules are assigned tothe required slots in the racks.
Based on this input, and other factors, the program on the Simatic device might send a binary output signal to the same machine with the following meanings:. More complex inputs, outputs, and calculations were also supported as the Simatic line developed. For example, the Simatic could handle floating point quantities and trigonometric functions. The higher the number except for the U , the more sophisticated and more expensive the system was.
Within each chassis style, several CPUs were available, with varying speed, memory, and capabilities. Some systems provided redundant CPU operation for ultra-high-reliability control, as used in pharmaceutical manufacturing, for example.
Each chassis consisted of a power supply, and a backplane with slots for the addition of various option boards. Available options included serial and Ethernet communications, digital input and output cards, analog signal processing boards, counter cards, and other specialized interface and function modules. The first entries in the S7 line were the S, S and S series.
These models were later succeeded by the S and S series. Programs running on Simatic devices run in software environments created by Siemens. The environment varies by product line:.
The final version of STEP 5 was version 7.
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