With the continuous development of the current economy and the continuous progress of social science and technology, people have accelerated the pace of a series of work on using new tools to replace human resources.
Programmable controller is one of the tools. Programmable controllers (PLCs) are developing rapidly from R&D to today’s application and development. They are used more and more widely in various fields of society. The author of this paper has many years of experience in research and application analysis of programmable controllers. Combining with his own work practice, the author dissects the relevant concepts of programmable controllers at the present stage, expounds the development status of programmable controllers, and probes into the application prospect of programmable controllers in order to be able to serve the vast majority of our country. Electrician colleagues provide their own experience for reference. Programmable Logic Controller (PLC) is a new type of controller widely used in industry. It has the advantages of small size, simple operation and easy maintenance, and is widely used in various economic and industrial production. The control technology of the programmable controller is to control the industrial automation production mechanically. Its operation is simple and easy to learn. It requires the operator to have certain computer operation skills and program editing skills.
Its control technology replaces the manual operation of the traditional manual operation, liberates the human resources and improves the efficiency of economic production [1]. Therefore, the study and analysis of the characteristics and working principles of the programmable controller can help to improve the control performance of the programmable controller in industrial applications, thus effectively expanding the application field of the programmable controller. In this paper, thermostatic element the author combines his own work experience to analyze the related research of programmable controller and its application in the field of industrial automation control. Programmable Controller is a kind of digital operation electronic system specially designed for industrial environment. It can effectively integrate computer, automatic control and information communication technology, so as to realize the core equipment of stand-alone computer, workshop and even factory automation. It is precisely because of the reliability of programmable controller. High performance, strong anti-interference ability, flexible combination, simple programming and convenient maintenance make it popular in the field of industrial production. The composing of the programmable controller includes the central processing unit (CPU), which is the control center of the programmable controller. The speed and memory capacity of the central processing unit are the important parameters of the programmable controller. That is to say, each programmable controller needs at least one central processing unit, and large programmable controller needs to be adopted. A redundant system is composed of two central processing units. Even if a CPU fails, the whole system can still run normally. It also includes memory (memory for storing system software), input and output interface, communication interface and power supply module [2]. The control technology of the programmable controller can be effectively used in the automation industry production, because the characteristics of the control technology of the programmable controller are more suitable in the industrial automation production. First, the operation of the equipment is relatively simple and easy, compared with other automatic production technologies, the control operation of the equipment of the programmable controller is relatively simple, it only needs to collect and input and output information through the computer, and the operation is very skilled; second, the process of programming operation is simple, because it can be programmed. The control technology of the programmable controller mainly operates the computer, mainly from the collection of relevant information to the input and output of the final information to form a cycle.
The whole process is easy to learn, which provides convenience for the smooth operation of production. Thirdly, the control process of the programmable controller is very precise, which is due to the fact that the programmable controller can control the production process very accurately. Programmable controllers are controlled by computers for various operations. As long as the program is set correctly, the unified production will be carried out according to the program, which can make the product more precise and more able to achieve the refinement requirements. At the current stage of social development, in the process of system control by using programmable controllers, the biggest problem is that the control system of programmable controllers has low compatibility. In addition, there are differences in the design and development of programmable controllers among enterprises or units at this stage, and at the same time, there are differences in programmable control. There are many different specifications for programming software. In this way, there can not be a unified application convention, so in the actual application of programmable controllers, it still shows some influence. In addition, there are still some problems to be solved in the programmable controller. Firstly, the humidity limit of the programmable controller needs to be solved.
This requires ensuring the stability of the corresponding components in the programmable controller, improving the effective control of the corresponding humidity problems in the operating environment by the programmable controller. Generally speaking, humidity needs to be maintained at 80-85%. The second is the vibration control of the programmable controller, which can control the frequency range effectively under the corresponding operating environment. In industrial control technology, it is usually controlled between 10 and 50 Hz, so that the corresponding vibration can be effectively controlled. The third is the temperature control of the programmable controller, which is programmable. During the operation of the controller, the ambient temperature of the controller should be kept between 0 and 55 C. That is to say, when the programmable controller is running, the problem of heat dissipation should be fully considered so as to ensure that the corresponding temperature in the operating environment can be kept within the required range on the basis of lowering the working temperature of the programmable controller. Programmable controller can realize automatic identification of control object according to the difference of modular engineering of equipment combination. Its application in this field can effectively improve the accuracy and effectiveness of industrial automatic control, and ensure its stability by controlling the temperature during the operation of equipment. The reliability of programmable controller for switching control is an important guarantee for the application of programmable controller. Different controllers in industrial production process have different parameter settings and adjustments to ensure the accuracy of control action. The programmable controller realizes the grasp of the control degree, and optimizes the design to improve the control effect of the switching quantity [4]. In modern industrial automation control, the position control of mechanical equipment is very important, and the programmable controller can borrow the corresponding control technology, so as to effectively control the mechanical position and displacement of motor, and realize the position control of mechanical equipment in industrial production.
The main purpose of centralized monitoring by programmable controller is to find out the faults of mechanical equipment quickly and timely, so as to maintain and manage the mechanical equipment at the fastest speed. The principle of the control system is that there is a fixed logic relationship in the programmable controller. If the logic relationship is wrong, the programmable controller will give an alarm. With the rapid development of modern computer technology and network communication technology, programmable controller, as an important part of automation control network and international general network, will play an increasingly important role in many fields other than industry and industry. In the future, programmable controller will play a more important role in industrial production and control field. Great development. First, from the technical point of view, the new achievements of computer technology will be more applied to the design and manufacture of programmable controllers, and there will be varieties of faster operation speed, larger storage capacity and stronger intelligence. Second, from the product scale and matching of programmable controllers, it will further develop towards the direction of super-small and super-large. External Programmable Controller products will also be richer, more complete specifications; Third, from the perspective of network development, the large-scale control system composed of programmable controller and other industrial control computers is the development direction of programmable controller technology. Programmable Controller (PLC) has gone through nearly 30 years since its advent. It has been widely used for its compact structure, high reliability, strong function, fast speed and low price. It has become the mainstream direction of industrial control system in modern society. At present, the programmable controller needs further research and analysis, and the existing problems need to be improved. In order to ensure the stability of the system, we must pay full attention to the influence of environmental temperature, humidity, stability and air quality on the programmable controller, so that the programmable controller can be maximized. The function of its application.