The most popular PLC technology application teachi

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The teaching reform of PLC technology application Abstract: This paper describes in detail the specific situation of the teaching reform in the teaching of PLC technology application in the electrical engineering major of our university: reform the teaching materials, and focus on the selected examples to implement the subject teaching; Enrich teaching aids, use appropriate teaching aids, and try to use intuitive teaching; Adopt the integrated teaching mode,; In teaching, teachers should do a good job of guidance, mobilize students' active participation and give full play to students' main role. Based on the advantages of adopting project-based teaching and the better teaching effect, this paper points out the feasibility of implementing project-based unit teaching in specialized courses of engineering schools with excellent mechanical properties

key words: Project-based unit teaching integration PLC technical school professional courses are no less difficult than colleges and universities in terms of theoretical requirements, while the foundation of students at the technical school level is weak, and the quality of students has been declining in recent years, increasing the teaching difficulty of technical school teachers. On the other hand, there is no mature and unified technical school supporting teaching materials in the use of professional teaching materials for new technologies. Some professional teachers are quite confused in the teaching process. Our school also encountered such a problem in the early stage of PLC (programmable controller) teaching. Later, we implemented project-based unit teaching, and the teaching effect was good. Our teaching experience hopes to lubricate the bearings for our brothers; Replacing rusted bearings brings convenience to the teaching work of school teachers. In 1997, our school tried to teach PLC, and in 1998, PLC was officially included in the syllabus of electrical engineering, becoming a professional course of electrical engineering. At the initial stage of PLC teaching, we carried out teaching according to the traditional teaching method, and the teaching effect was general. Through several years of teaching practice, we have accumulated some PLC teaching experience and carried out some teaching reforms. The tradition of teaching according to the chapter sequence of teaching materials has been reformed into teaching according to the subject unit. The results showed that the teaching quality was improved and the teaching effect was good. Now compare the teaching situation of the electrical engineering teaching class (hereinafter referred to as class a) enrolled in 1998 with that of the electrical engineering teaching class (hereinafter referred to as class B) enrolled in 2001: the average score of the PLC final exam of class A is 67.4, while the average score of the exam of the same subject of class B in the same period is 83.6. According to the enrollment situation, the quality of students in class A is on average better than that of students in class B. However, class A is taught in the traditional way, while class B is taught in the subject unit. From this point of view, the use of project-based unit teaching is conducive to students' learning of PLC technology, and the teaching effect is significantly improved. The mechanical properties are more important than other physical properties. 1、 In order to achieve good teaching results in the project-based integrated teaching, we should carry out teaching in an integrated mode and implement the unit clearance system in teaching. We should pay attention to the following aspects. Reasonably reform the teaching materials and design each example subject. As we know, PLC textbooks for teaching are generally divided into independent chapters according to basic principles, basic instructions, basic applications, basic operations, etc. Editors compile books according to the structural rigor. When teachers implement teaching, they should consider the cognitive process conducive to learners and carry out teaching. This is a problem that textbook users should pay attention to. If the teachers teach according to the sequence of teaching materials, they should learn all the basic instructions, then learn the basic application, and then learn the basic operation after the basic learning. In this way, after learning all the instructions within a period of time, the students are not impressed and are easy to be confused. When learning the basic application, they have to learn the involved instructions again, which is inefficient. After learning all the theories, we can carry out the basic operation. We can't benefit from each other, and the teaching effect is not good. For this reason, our school has adopted the project-based unit teaching in the PLC teaching, and re compiled the teaching content. The teacher collected hundreds of PLC application examples through various ways, and filtered and integrated them into 6 units, each of which is composed of 6 similar examples. Each subject takes an application example as the theme, and its content includes: the production purpose of the application example, the introduction of production conditions and production environment, the circuit controlled by PLC, the basic instructions used, programming methods, debugging and application. The teaching unit is composed of 6 practical projects applying the same kind of instructions, and the whole teaching content is divided into 6 teaching units. The six unit topics are PLC principle, timing control, counting control, position control, step control and comprehensive application of special functions. The topics in the unit are arranged in the order of their difficulty. The first unit includes inching control of motor, continuous control of motor, forward and reverse control of motor, and manual y of motor- Δ Control, Responder control system and mathematical display control system are six examples for learning the working principle of PLC (which also includes the learning of several simplest instructions). Unit 2: motor automatic y- Δ Learn the principle and application of time sequence control through six examples, including step-down start control, two lights flashing cycle control, multiple motor sequence control, cargo conveyor belt control system, stage art lighting control, and integrated lighting fountain control. From the two units listed above, it can be seen that each example subject selected and designed by the teacher is scientific and coherent, from simple to complex, from easy to difficult. The examples in the unit can effectively serve the teaching of the core content of the unit. Therefore, in order to reform the traditional teaching into task-based unit teaching, the primary task is to reasonably design each example project. These examples can not only facilitate students' learning, but also include all knowledge points of this course. 2. Actively carry out relevant activities within the scope of the articles of association and authorization of China Plastics Processing Industry Association. 2. Matching appropriate teaching aids, strive to visualize and visualize. We know that the so-called difficulties are the difficulties that students encounter in the learning process. Most of these difficulties come from students' lack of practical feelings for objective phenomena. Because there is too little perceptual knowledge, it is difficult to make a leap from perceptual knowledge to abstract concepts. One of the characteristics of PLC application technology is logic and abstraction. Teachers should try their best to use teaching boards and projection teaching in teaching. The benefits of this are: intuitive and impressive; Convenient and time saving; Vivid and stimulating learning interest. In the process of teaching, our teachers have provided slides and teaching boards of subject examples to provide conditions for intuitive teaching, so as to enhance students' perceptual knowledge and reduce the difficulty of learning. The example courseware models produced and matched by our teachers are generally completed by students in their spare time under the guidance of teachers. This will not only reduce teaching costs, but also fully mobilize students' enthusiasm and exercise their motivation

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