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S7- Basic logic instructions detailed overview of the smart - 200
by：Coolmay
2020-07-06
With the constant development of PLC system structure at the same time, PLC programming language is becoming more and more rich, function also gradually improve, basic has four kinds: expression program ladder diagram and instruction list, logic diagram and the high-level language, ladder diagram is currently the most widely used a programming method.
Ladder diagram (
小伙子)
, PLC is used the most graphical programming language, is one of the first programming language of PLC, ladder diagram was given in the form of a relay control circuit, the ladder diagram is commonly used in the logic of relay and contactor control based on simplified symbols evolved, possesses the characteristics of image, intuitive, practical and electrical workers are more likely to accept, is currently use most of a PLC programming language.
In PLC program diagram, left and right busbar is similar to relay and contactor control power, the output coil similar to load, the input contact is similar to the button.
Arrange ladder diagram consists of several class, from top to bottom, each class in the left bus bar, after contact and coil, bus stop at right.
relay control circuit with PLC control circuit contactor interlocking positive &negative control circuit PLC controller data storage area (
In 200 the SMART, for example)
basic logic instructions on a logical order application, for example, write up guaranteed stop control program, namely press I0.
I0 zero, press the button.
1 stop motor Q0.
Zero, as shown in figure: :
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The average consumer is always looking for ways to save money while finding out solutions, is designed for killing two birds with one stone, providing a perfect solution to plc manufacturers problems.
With all the pros and cons of different in mind, click Coolmay PLC to learn more about and decide which plc manufacturers option is best for your case.
The global market is estimated to reach a value of almost programmable control systems in the next decade. have a robust position in the plc controller price market because of its proven high potency in programmable control systems.
Using high-quality materials to produce plc manufacturers is one of the most important part during manufacturing.
With a few simple , and a little bit of plc controller price, you to can handle programmable control systems on your own.
