Based On Profibus Plc Control System Research And Design,

Now PLC control system is widely studied and applied in the field of industrial automation. PLC control system conbine with Field-Bus will keep PLC, Field-unit, client and service computer in real-time communication. This control system affect the industry production directly. So the combination of PLC control system and Field-Bus will become the hot spot in near future. The works of study and application of this combine system will enhance competence in this field of our country.Siemens, one of the most successful supplier of automation products in world wide, has successfully supply a series of software and hardware base on PROFIBUS and PLC. It has enlarged the ability of communication among field units, shortened the research cycle, optimized the software application, enhanced the system compatibility. So we should study the PROFIBUS Field-Bus from the theory of protocol level, and far more study the SIMATIC PLC. Those works will improve tech. a lot.This article describe the application of PROFIBUS in SIMATIC S7-300 PLC, configure the hardware of the production line of wires in STEP 7, study the teeory of PROFIBUS, analysis the protocols and message structure of PROFIBUS-DP define blocks of PLC and tags of WinCC, design LAD language and WinCC script programs, drawing every paddles of the production line in WinCC.The purpose of this study is to design Siemens PLC S7-300 control system base on PROFIBUS Field-Bus. This control system include PLC field unit designing, the management of computer station and software simulations. The study of Field-bus protocols will promote the realization of PROFIBUS communications. The application of S7-300 PLC and WinCC is valuable in the field of industry. The combination of PLC control system and Field-Bus tech. have fulfill the requirement of high speed communication , and ensure the system to be more reliable stable and effective.