Research And Development On The Programming Environment Based On The IEC61131-3 Standard

Programmable Logic Controller is a kind of automation device with microprocessor and memorizer as its control center, which play a more and more important role in the field of industry. However, the development of PLC have close relationship with the computer technology, semiconductor technology, control technology, digital technology and network communication technology etc. The improvement of any kind technology would lead to the reform of PLC control system.As we can see that the step of PLC's development is very fast. At the same time, with the improvement of the manufacture technology and the increase of the process complication, it have a newer request for the control program. During the course of PLC's development, the production of PLC, from a long time is always used within a specially manufacture, because of it ,some inconvenience has been come out.IEC61131-3 standard, as the first international standard for the software design of industry automation control system, increasingly improve the quality of programming language in industry control system and the efficiency of software manufacture. The series of graphics language and textual language defined in IEC61131-3 standard, take a great of convenience to not only the system integration manufacturers and system engineers but also the direct users. The practice proved that, the adoption of IEC61131-3 standard is the only way for development of PLC control system.Firstly ,the paper investigate the actuality and the developing trend of PLC control system, then put forward the study direction of this paper. With the detailed expatiation on IEC61131-3 standard, the author made the feasibility analysis, set up the software system modeling and finally realized it with the advanced language C++. At last, summarize the investigation production of this paper and the work in further.