In recent years, with the development of social science and technology, the functions of programmable controllers have become more and more perfect, and the application fields involved have gradually increased. As an industrial control computer, programmable controller (PLC) has become the mainstream equipment of Engineering controller in the industrial field, and plays a key role in the field of controllers all over the world.
With the increasing demand for control in the industrial field, the performance and function requirements of programmable logic controller (PLC) for users are constantly improving. This paper mainly explores and discusses the characteristics of programmable controllers, and estimates the development trend of programmable controllers in the future development of science and technology. Around 1960, with the constant introduction and popularization of small computers, the production of large-scale small computers and the development of multi-computer cluster control, people have introduced small computers in their daily life, devoting themselves to making small computers contribute to industrial control. The birth of Minicomputer replaced the traditional relay contactor. The traditional relay contactor uses a fixed connection mode. With the change of industrial production process, the design and installation of the circuit should be improved accordingly. So the traditional relay contactor is not conducive to product renewal. However, the development of programmable controllers can control the updating of products well. It is not only easier to learn than a minicomputer, but also more convenient to use than a computer, and has a strong comprehensive system. Programmable controllers have more control functions of most computers.
They also have the characteristics of a higher level than computers. It not only has the functions of operation, processing and data transmission, but also replaces hard wiring logic with powerful logic programming. It is a kind of control device in electronic computer industry, and it has the characteristics of miniaturization and super miniaturization in appearance. Such a multi-functional device can be programmable controller.
The reason for the simplicity of programmable logic controller programming is that it uses trapezoidal graphics language to control. The programmable controller uses the technology of computer software to construct the relay model commonly used in the past.
Its unique trapezoidal language constitutes a programmable controller in the form of relay, which replaces the defect of relay itself with an expression form, making it easy for people to understand and operate. At the same time, electrical operators will not be accustomed to using relays and have no knowledge of programmable controllers, which also shows that there is no insurmountable gap between relays and programmable controllers. If users want to use the programmable controller in the right way, they also need to have some professional knowledge and know some hard truth of software knowledge. Programmable controllers have the advantages of easy use and system maintenance. In the process of using and maintaining the programmable controller, it is divided into the following stages: hardware configuration, installation, use and maintenance. In terms of hardware configuration, the hardware of the programmable controller is manufactured according to the standard specifications.
The hardware can be configured according to the actual needs, and there is no difficulty in purchasing the hardware. In terms of hardware configuration, the configuration of the programmable controller is convenient to purchase. In the installation of the programmable controller, its advantage is that it does not need to add wiring and welding work, only need to write programs to complete the work of the programmable controller. In the use of programmable controllers, the use of contacts is not affected by the number of times of use, thermostatic element has a certain degree of openness, internal devices will not change because of the number of users, only need to consider the appropriate number of input and output points can achieve good results. In the use of programmable controller, it has a lot of monitoring prompts. When the system is in trouble, it will automatically send out monitoring prompt signals to remind maintenance personnel to carry out machine maintenance work in time. And this kind of display is also at any time, staff can monitor the operation of the programmable controller at any time.
Such advantages not only benefit the control and maintenance of the controller on site, but also facilitate the inspection process and save a lot of time and cost. In a word, programmable controller can play a very good role in the process of use and maintenance.
The programmable controller has the characteristics of stable operation. Programmable controllers are generally used in industrial control, and their internal components contain anti-interference and selection components, so in harsh industrial environment, programmable controllers can also work with high-power equipment at the same time, so the operation of programmable controllers is more stable. If the programmable controller can have good overall design and high quality devices, and adopt advanced power supply technology, its anti-interference ability will be more powerful. According to the development of programmable controllers in China, the average trouble-free working time of programmable controllers is between 20,000 and 50,000 hours. Various manufacturers of programmable controllers have different types of controllers. They configure the size and equipments of controllers according to the user’s own choice. However, in the actual work process, the number of users who use multiple controllers is relatively small, and people will choose more original controllers without other additional devices.
Programming controller. Strong versatility also means that manufacturers can develop better equipments without worrying about the multi-tastes of users. At the same time, in the process of maintenance, they can also carry out maintenance in an efficient and guaranteed manner. So, the programmable controller with strong versatility is highly praised by people. The programmable controller has the advantage of convenient installation. Because the controller is small, compact and easy to install, it is convenient for the relevant staff in transportation. After the invention of programmable controller, many foreign countries have developed controllers, and the development of controllers has been greatly welcomed by industry. In the late 20th century, the programmable controller has become the dominant basic automation facility of industrial control at home and abroad. According to relevant investigations, more than 200 manufacturers of programmable controllers have been established in the 20th century. Total sales also approached $40 billion. At present, programmable controllers in advanced countries in the world have become an important facility covering all industrial enterprises. The unique technology of programmable controller has become one of the trends in the world. In our country, the development of programmable controllers in recent years is also progressive.
Our country’s programmable controller also has the corresponding economic and social benefits. Shanghai Baosteel Company is the first project of programmable controller. The development of the first project provides a good start for the reference of programmable controller. While developing and producing our own programmable controllers, our country is constantly introducing advanced science and technology from abroad. In the future development stage, our country’s programmable controllers will also have a good development prospects, the use price will continue to reduce with the production of excavation and saving, through the effective combination of remote functions to create greater benefits for industrial control.
This article mainly discusses the characteristics of the programmable controller and expresses the desire for the development prospects of the programmable controller. Science and technology are related to the fundamental lifeline of the country, so how to develop is the key. I hope this article can provide some practical help for the relevant workers.