| After the distributed control system(DCS). Field bus control system(FCS) is becoming the new generation control system,which is one of the focuses in the control field now. In multitudinous field bus standard,the PROFIBUS sdandard has the merits of internationalization,opening,not depending on the device manufacture etc,which is becoming the object many countries study on. It is the reason that this subject is selected.PROFIBUS technology is a hot pot in the current field of control technology. The application and research of PROFIBUS-DP technology have been fully-fledged abroad, but it is mainly in unitized device from big corporations such as Siemens. But the independent research and development are lacked. According to current situation. This paper adopted MCU and FPGA design scheme. We Developed the LK618(based on profibus-dp protocol with count function the digital quantity input interface module business model) , this module mainly functions :First of all,as a slave model achieve the communication with a master unit.Secondly as 16 road leak type digital quantity input module,not only completing the work of signal collection,but also can count 8 of them channel pulse signal.The hihest pulse signal of 5kHz frequency.PROFIBUS technology is introduced first,including its technology features,protocol structure,transmission technology and protocol access.Then introduce the PRODIBUS-DP components and configuration of the system,the way of working,data transmission,fuction of DP and so on.Then mainly researches hardware design and software design of PROFIBUS-DP slave.Hardware structure is in the form of"systemboard+ interfaceboard",systemboard using the MCU+FPGA control. Interfaceboard design 16 road digital input interface.Software design,including PROFIBUS-DP slave program,GSDdocument,count program and else. The LK210 of Hollysys company and PC compose the master station,using the PowerPro software,for test the slave station interface and get good result. |
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