SoftPLC Technology Based On PC-Design And Realization Of Editor System

At present, SoftPLC technology based on PC is a new control technology and one of main research interests in industrial automation & control technology, which has a great many advantages of open control system, stronger data processing and network communication capacity comparing with traditional PLC, but also meets need of modern industry automation.This paper presents the approach to design and realization of the SoftPLC, by analyzing and researching the related concept and technology of the SoftPLC; also disscusses each composing part of running system and editor system of SoftPLC system structure and working by analyzing and researching SoftPLC control system work theory and realizying strategy, but also gives detailed realizing plans. Mainly work of the research that this paper has done as follows :1. This paper researched correlative technology of the softPLC, and discussed the advantages of softPLC than the traditional PLC, and the necessity of developing softPLC based on the PC system.2. After analyzing and researching about international standard IEC61131-3, discussed the necessity of using this standard, and analyzed and researched making use of IEC61131-3 to meet with the softPLC common and transplantable specialty in developing the softPLC.3. The paper has established a frame for the platform of this SoftPLC. Based on the IEC61131-3 standard, this paper has established overall construction of the software platform on the PC platform and software model complying with IEC61131-3.4. This paper has conducted the thorough research about the softPLC system's structure and the principle of work. This paper has analyzed constituent and principle of the soft PLC system and thoroughly discussed the concrete realization strategy of editor system and running system.5. This paper has studied composition structure of the editor system and it's principle of work. This paper has designed the project management module, specifically has realized trapezoidal chart editor, instruction list editor of the editor system and function of translating trapezoidal chart into instruction list. This paper has planned the simulation module and the preliminary design about instruction list compiler.6. This paper has carried on the research and analysis about running system and proposed the concrete realization plan.Finally, this paper has carried on the thorough analysis about essential technical question during research and proposed the concrete solution.