PLC learning experience 20, PLC learning experience

Some beginners have spent a lot of effort in theory, but they still haven't understood PLC for half a year, in fact, they just lack some practical experience in PLC, as long as they carry out some practical ladder diagram writing, programming, debugging and other operations, increase the perceptual understanding of PLC, and soon be able to master the technology of PLC. At the beginning stage, you can learn a brand of PLC, because all PLC principles are similar, and if you master a PLC, you can get started with it as long as you read the manual.

When you are a beginner, you can make some simple ladder diagrams, such as the AND, OR, and output of contacts, and run them in the PLC machine. Success will increase your interest and confidence in learning. Then use the main functions of the PLC one by one, such as the high-speed counter, you can use the pulse output of the PLC itself to terminate to the input of the high-speed counter, ** the ladder diagram that has been compiled, open the variable observation window, run the program, and observe whether the value of the count is correct.

After such practice, you basically know what the PLC can do, and you can be confident in the actual industrial control application.

1 Reasons to study PLC.

PLC control is the mainstream of today's automation control, at present, most of the automation machine control adopts PLC control, as long as it is engaged in automation, it is necessary to use PLC, otherwise it can not enter the door of automation control, and is eliminated by the automation industry. For this I had to learn PLC.

2 Method. A If you have the conditions, it is best to buy a PLC for practice;

b PLC technology is a very practical technology, if you want to learn it well, then you have to practice it. Programming is like a person who practices martial arts, if he just sits at home all day and reads boxing books and doesn't go out to practice martial arts, then no matter how powerful a martial arts book is, no matter how long his skills will not improve. It's the same thing for learning PLC, it's useless to just read a book, you still won't use a PLC book after reading it ten times, and anyone who has learned programming (no matter what language) knows it.

c In the process of learning PLC book knowledge, you will definitely not know many instructions very well, if you do not solve them one by one, then this will be the biggest obstacle for you to learn PLC. Therefore, carry out practical application and break through one by one, so that your PLC knowledge will not only be learned firmly, but also you will master the practical use in the process of learning.

d After learning PLC with a certain foundation, you can independently write a program designed by yourself, and then transfer it to PLC to run the program. After continuous modification, debugging, and finally successful operation, your interest will be greatly increased, and satisfactory results will be achieved.

The key is to use physical objects to operate, it is not enough to just read books, it is best to combine theory and practice.

The experience is used, and all learning is not as good as on-site practice.

1. All PLC learning.

First of all, buy a book about PLC (it is recommended to buy a book of "Electrical Control and PLC Application Technology" to take a look, the first half of this book talks about some commonly used electrical components and basic circuits in the electric control cabinet, and the second half talks about the application of PLC. It should be suitable, you can go to the bookstore to see. ）

And then there's a PLC on hand

Then, based on the examples in the book, you can figure out a small project on your own to implement a feature.

Finally, practice brings true knowledge, do a PLC project independently, the project is completed, the PLC will be mastered, the Siemens 200 series of small PLC is very suitable for novices to learn, it is relatively easy to get started.

First of all, it is necessary to understand the knowledge of electricians, understand the control of electrical appliances, understand various actuators, and then understand the working mode of PLC, input and output circuits, and finally understand the corresponding process.

1, learn PLC first of all to choose a good learning of which manufacturer's PLC, the Japanese PLC internal software integration is high application simple early OMRON, Mitsubishi application more, now due to the first and international cooperation between the application of Siemens PLC, Rockwell a little more, (although it is said that a brand is profound, others will soon get started, but people's energy is limited, must be used in the most widely used, potential, development of a direction, However, for each brand of PLC have some understanding, including imported, domestic, these have a corresponding understanding, for the characteristics of each PLC, advantages and disadvantages, these have a better understanding, then will be a rare talent in the market in the future. ）

2. PLC is not a single programming technology, it is a system professional course. A PLC can be broadly considered a highly reliable PC with an operating system embedded in the back. First of all, you need to be proficient in the programming language ladder diagram and sentence table language of the PLC itself.

At this level, you can only read the programmed programs and design some of the programs needed for the project. In this industry, it is also necessary to apply VB and VC to realize serial port communication and distributed control system. Knowledge of databases is also required in some large programs.

PLC is quick to get started, but you have to keep making an effort. ）

3. PLC is a discipline that focuses on the application direction. So a little more practice. Don't look down on small projects, where you can summarize the logical thinking method for designing programs.

Keep making progress in the summary. For example, every time you go to the site to debug, call the program on the site to view, from which to understand the structure of the program, and other programs are different and characteristics, then the progress will be faster, good luck!

Read the book first, understand the basic instructions, then look at some examples, and then modify some small programs, and then put forward suggestions for improvement of some programs, and finally be able to program, in the process of learning and modifying examples, I naturally learned advanced instructions!

There is no skill, only reading and practicing.