The plc is the foundation of modern industry. Although it is the product of the second industrial revolution, it has not disappeared after nearly a century of ups and downs. It has become more and more powerful. It is not only widely used in industrial production, but also in daily life. Wide range of applications. Many electrician friends who are engaged in repairs and maintenance in factories, as well as students who have just graduated from school, want to work in the automation industry. PLC is an inevitable hurdle. But I have no relevant experience and no predecessors to lead the way. In addition, now the masters and experts are flying all over the sky, leading to many detours. For this reason, the editor specially sorted out and hoped to help everyone.
1. Brand entanglement This is the most common and the most LOW question. People often ask questions like this in the background message. Is it better to learn Mitsubishi plc or Siemens plc for entry? I have the foundation of Mitsubishi, how long can I learn Siemens PLC? I don't want to repeat these low-level questions for entry. When you are tangled up, it is estimated that the day lily will rot. How to choose PLC in most cases is based on your actual contact. How often does Mitsubishi learn from Mitsubishi at work, and vice versa to learn from Siemens. For other brands, European and American brands learn from Siemens, and domestic Asian brands learn from Mitsubishi. It is worth mentioning that when you have never been in touch with PLC, you can choose Mitsubishi if you want to be simple and easy to use, and you can choose Siemens if you want to learn the most widely used in the market.
2. It is also very common to find information without hands. You can download various PLC programming manuals in the forum of the electrical learning network. After reading and searching the posts inside, you will find that there are many materials you need, don’t come across When it comes to the problem, you should first ask others. The correct way is to take the initiative to find out and use the powerful search function of the Internet to find the content you need. When you can't find what you want, go to the teacher for advice and learning. Remember to open your mouth and come, the process of finding can make you cherish the content of the information you are looking for more.
3. Don't look at the information. When you get the information, I hope you can read it carefully instead of letting the information sleep. This is also connected to the third one. Only after finding it hard can I cherish it and watch it carefully.
Fourth, always think about the simplicity of entry. Many experts recommend starting from Mitsubishi PLC, because the entry is simple, and many novices do this. In fact, this is not necessary. Since you want to learn PLC, you should face the difficulties and keep thinking about simplicity, so you don't need to learn it at all. Compared with Siemens PLC, Mitsubishi PLC is indeed relatively easy. The reason is that it solidifies many things for you. For example, it does not have the concept of variables. For example, it does not have the concept of addressing. For example, it does not have the emerging PLC programming language such as ST language. When you learn Mitsubishi PLC, you also learn ladder diagram. The application of the ladder diagram is getting narrower and narrower. Of course, Mitsubishi also supports the IEC standard and also has a structured programming mode, which is equally difficult.
5. If you don't study the basics seriously, some people often ask, can you learn with zero basics? There are also experts who are not responsible, and always post some zero-based introductory tutorials. Learning everything starts from the basics. If you don’t have the basics, you can learn it. Before you go to driving school to learn a car, do you have a car foundation? You know that the steering wheel is round, right? Knowing that the steering wheel is round, diangon.com is the basis of learning to drive. Similarly, learning PLC also starts from the basic electrical engineering foundation, you let a fitter learn PLC? He doesn't even understand direct current and alternating current, so doesn't it start with how to distinguish between direct current and alternating current? The basics of PLC include Mandarin Chinese (can communicate normally), electrical engineering basics (direct current, alternating current, switch buttons, relays and other components), computer basics (basic computer principles, binary, hexadecimal, byte, word and other common sense) And mechanical, hydraulic, pneumatic and so on. Still the same sentence, we can learn it if we don’t, we can learn the basics without foundation.
Sixth, the thinking mode is fixed and cannot be inferred by analogy. This is the most terrible. The so-called work experience is to constantly learn from one another and improve one's knowledge structure and reserves, rather than simple mechanical time accumulation. You get ten years of self-locking interlocks and one month of self-locking interlocks are the same. After learning PLC, you must use the way of thinking of PLC. Don't always think about converting logic circuits into ladder diagrams. This is wrong, because although the two are related, the essence is different and the working mechanism is also different. The best way is to learn more and practice more and read more programs written by others.
Seven, practice modular programming a lot, instead of Mitsubishi's one-shot model. Many people who have studied Mitsubishi PLC but haven't thought about it seriously will take a look at Siemens' programs, mainly S7-300, S7-1200, S7-1500 The program looks dumbfounded, what is this, is this a PLC? Why is it different from what I have seen before, why are they all FB? This is actually a modular programming method and the development trend of PLC. There are many advantages of this method, especially for large-scale projects, distributed projects, and future information plants, it is very convenient. It is also very convenient for system expansion and device transplantation. If you just want to make ladder diagrams and self-locking interlocks, it doesn't matter if you don't learn.
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