Programmable controller is an industrial control device integrating computer technology, communication technology and automatic control technology. For beginners, they have mastered the basic principles of PLC and are familiar with commonly used programming methods. They can use them freely in simple system programming. However, they are often incapable of designing more complex control systems. If they want to be proficient in PLC applications, learners have to Establish correct learning methods, learn plc programming skills in depth, and the most important thing is to learn related knowledge. Let's talk about the experience of learning PLC from six aspects.
2. Use the software package proficiently. Take learning Mitsubishi products as an example to introduce the use of the software package. The Mitsubishi software package consists of two parts, the programming software GXDeveloperVersion8C and the simulation software GXSimulator6C. The programming software GXDeveloperVersion8C provides a programming environment for designers. Designers should familiarize themselves with programming manuals and be proficient in program editing skills so that their design schemes can be displayed. Whether the designed program can meet the control task, it must be debugged. The traditional debugging method is inseparable from the programming controller CPU. If necessary, additional input and output modules, special function modules, and external machines must be prepared. The simulation software GXSimulator can provide a virtual experimental platform. GXSimulator is a software component package that runs on Windows. Adding GXSimulator to the computer where GXDeveloper is installed will enable debugging when offline. The non-on-line debugging function includes monitoring and testing of devices, I/O simulation operations of external devices, etc. For personal learning, there is no experimental condition, and the simulation software can develop and debug the sequence control program on the personal computer. Through the continuous simulation and debugging of the program, the user slowly understands the program design experience, thereby increasing the programming experience.
3. Special function modules During the learning process, most students will focus on software programming, and modern industrial control has proposed many new issues for PLC. If you use general I/O modules to solve them, in terms of hardware The cost is too high, programming in software is quite troublesome, and some control tasks cannot even be completed with general-purpose I/O modules. Therefore, it is particularly important to learn the special function modules of PLC. These special function modules include analog input and output modules, high-speed counting modules, and motion control modules. These special function module PLC manufacturers have given detailed user manuals. Users can complete the realization of special functions by carefully studying the user manuals, simplifying software programming and reducing economic costs.
4. The human-machine interface is connected to the programmable controller, and the display screen is used to write working parameters or input operating commands through the input unit (such as touch screen, keyboard, mouse, etc.). Interface, commonly known as touch screen. The touch screen is easy to use, sturdy and durable, fast response speed, space saving and other advantages, making system designers more and more feel that the use of touch screen does have considerable advantages. The touch screen is composed of hardware and software. The user interface design can be completed by the software, and the PLC program design greatly simplifies the use of the computer. Even people who don’t know anything about computers or operators who don’t understand PLC programming can also set up according to the control requirements. Control system parameters, production recipe storage, equipment production data recording and other operations. The learning of the touch screen can be carried out according to the following steps. First, carefully read the screen design manual for a certain series of touch screens for user screen design; then design the touch screen screen operation to realize the corresponding PLC program; finally open the touch screen and PLC programming simulation software for simulation debugging.
5. Master the mainstream products of three genres. At present, there are more than 200 manufacturers producing PLCs in the world. It can be roughly divided into three main genres by region: one genre is Japanese products, represented by Mitsubishi FX series small PLCs; one genre is American products, represented by AB’s PLC series medium-sized PLCs; the other genre is European products , Germany's Siemens S7 series large PLC is represented. Different types of PLC products have different characteristics, not only in terms of special and complex functions, but also in terms of programming language and program organization. It is obviously unrealistic and unnecessary to master all PLC products. On the basis of proficiency in a PLC product, consciously choose the most representative product from other main schools, and use comparative learning methods to conduct relatively in-depth research. In this way, when you encounter other models in future work, study, and development and research, you will be able to comprehend by analogy.
6. Make full use of network resources and grasp the latest information on PLC applications and development. The update speed of PLC products is very fast. If you want to grasp the latest information on PLC applications and development in time, you must make full use of the learning platform provided by the Internet for us to conveniently , Quickly and economically grasp the latest developments of PLC. In particular, some professional forums on the Internet can provide us with a high-level communication platform. A large number of learning materials, manuals, and software function updates have benefited learners at different stages. In short, PLC is easy to get started, really master the programming methods of programmable controllers, and can smoothly design to meet the requirements of production tasks. At the same time, the program is simple and easy to understand. Designers must learn PLC technology in depth. Learners can use the above introduction.
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