ABSTRACT
Exactly according to the current status of Fieldbus development and application in our country, studying the basic theory of PROFIBUS-DP (including system composing, protocol structure, data access mechanism and slave station communication principle), based on which this paper puts forward development proposal for the PROFIBUS-DP intelligent slave station’s communication interface. During the research of the thesis, use advanced programming tool and program language to develop software of the system. The whole research and design has come through the following stages: design of system scheme, design of hardware and software, and system test.
This paper is use the MCU serial port (UART) and the main station for communications, actualize the protocol of data link layer by the software.That is integrating parts of PROFIBUS Slave Station protocol in the 51 series CMOS. So it can replace the special protocol chip and realizes the function of intelligent slave station.
Finally, this paper summarizes the whole work of the design, and brings forward the experimentation and actualization for the design of PROFIBUS-DP intelligent slave station interface.
