The Design Of Developing Platform Of PLC Programming Language

Along with the increasing development of industria 1 control technology, the application of PLC is more arid more extensive, the role of it in industrial control field is also obvious. Due to many PLC manufactories, many companies has special net communication means, many kinds of PLC can not compatible, there has no definite standard. As these reasons, it was hard to communication among many PLCs and has no advantage to fact manufacture. With the development of industry control, these problems will become more and more extrude.It provides the opportunity that domestic researcher competes with foreign manufacture on software that international standard IEc61131-3 is publicized and advanced and high-performance single chip technology is developed. Analysing five kinds of programming language prescribed by international standard IEC61131 and their peculiarities, choses Ladder Diagram(LD) and Instruction List(IL) as two programming languages of this system, and makes their instructions.The main task of my research is to develop an IDE (Interged developing Environment) for the PLC system to provide user with an intuitionist, convenient and high-efficient programming environment based on personal computer. According to the methods of the software engineering and object-oriented design, the system analysis and requirement analysis on this platform are made, and the detailed function requirements of the software are drew. And then, through the modularization design, the software is composed of translation module, edition module and so on.First, this paper makes a summary of PLC's developping process, domestic and international situation at present and its developing trend in future, and then gives a whole concept and a main framework for soft PLC and the similarities and differences between soft PLC and hardware PLC analyzed. Then a system analysis and requirement analysis on this platform are made according to software engineering, and then basing on these, the detailed function requirements of the software is drew and the software's frame of platform are designed. Then, the author introduce in detail the design idea of this platform software, and the research combines these modules, makes customer interface, experimented that the control function was coming true with this development system which proved its correctness and feasibility.At last, this paper summarized researches I had done and pointed out the emphases in the future research work.The result of online test shows this platform can correctly compile user's programm into an executable file in PLC hardware. It is a certain trend that PLC is developed to follow the international standard. But research of domestic PLC producer barely rises. Compared with the developed country, domestic PLC industry is behind wholly. I hope my research have a little positive effect on research and development of our county's PLC.