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Anonymous users2024-02-06Learn PLC programming.
First of all, we need to start with the theoretical foundations.
1) Learn the basic principles of PLC.
Hardware: Understand the basic structure of the input and output terminals, and familiarize yourself with the basic electrical requirements of the port.
Software: For PLC systems.
It is necessary to figure out what is IO refresh, which is the basis of programming, to know the work cycle of the PLC.
It is recommended to study "Principles and Applications of Programmable Controllers".
2) Learn the basic instructions.
You can start with a ladder diagram.
The language begins with the practice of basic logical instructions.
Learn all kinds of logic blocks.
It is recommended to study the PLC Self-Study Manual
3) Practice. can be found in the simulator.
Simulation exercises: (generally PLC programmers have simulation functions).
Write the PLC program, compile and run, manually input some signals, and whether the signal change of the output port meets the requirements of the program.
Finally, the actual battle. Methods of PLC programming:
1. Empirical method.
That is, to use one's own or other people's experience to design, select successful examples similar to the design requirements before designing, and modify them, add or delete some functions or use some of the programs until it suits their own situation. In the process of work, you can collect and accumulate such successful examples, so that you can continue to enrich your experience.
2. Analytical method.
You can use combinatorial logic or.
The theory of temporal logic, and the use of corresponding analytical methods, the logical relationship is solved, and then according to the results of the solution, draw a ladder diagram or write a program directly. The analytical method is relatively rigorous, and certain standards can be used to optimize the program, which can avoid the blindness of programming, which is a more effective method.
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Anonymous users2024-02-05The role of PLC programming:
1. Learning PLC programming can make you think more clearly when doing things.
2. Learning PLC programming can allow you to upgrade from an electrician to an electrical engineer, and mastering PLC programming is the only way to upgrade from an electrical engineer to an engineer.
3. Learn PLC programming to allow you to look at an industry from an overall perspective.
PLC control is now the mainstream of automation control, the current automation machine control is mostly PLC control, as long as the personnel engaged in automation, must be able to PLC programming, otherwise not only can not enter the door of automation control, will be eliminated by this industry.
PLC is now widely used in textile, metallurgy, automobile production, food and beverage, electronics manufacturing, chemical industry, power plant, papermaking, oil exploration and mechanical design, national defense and other fields.
How to learn PLC programming:
1. Start learning from the basics.
If you want to learn PLC, you must start from the basics, the foundation of PLC includes, Mandarin Chinese (normal communication), electrical fundamentals (direct current, alternating current, switch buttons, relays and other components), computer basics (basic computer principles, binary, hexadecimal, bytes, words and other common sense) and mechanical, hydraulic, pneumatic and so on.
Only when you have mastered the foundation can you go down to learning, just like building a building, laying the foundation first.
2. Understand the electrical schematic diagram.
The circuit diagram is the basis of development, since PLC can replace relay and contactor control, the corresponding basic circuit principle is to know.
3. Understand the basic structure of PLC.
Since you want to learn PLC technology, you must have an understanding of PLC, at least you need to know what PLC is, which parts are mainly composed of, what are the functions of each part, and a simple understanding of PLC scanning process, action principle, working state, etc., the basic need to understand.
4. Master the ladder diagram of the foundation.
Ladder diagram is a way of PLC programming, to understand the basic ladder diagram, you can start from the simplest basic circuit, and slowly practice the simple circuit diagram into PLC ladder diagram, ladder diagram is a must need to master!
5. Learn basic programming languages and instructions.
Programming languages and logic instructions are logical languages that PLC can recognize, just like what people say, so we need to figure out the basic logic language of PLC, because logic instructions or logic language are words that PLC can understand, basic programming instructions: LD, LDI, AND, and so on.
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