PROFIBUS 是目前國內外廣泛運用的工業現場總線之一，它提高了過程控制中的分散
外設及I/O 口數據傳輸的安全性和可靠性。針對無軸印刷機外設數據傳輸要求較高的實時性和可靠性，該項目設計了基于C8051F020 和SPC3 的PROFIBUS 智能I/O 從站。本文著力闡述了智能從站的硬件設計，介紹了智能I/O 從站模塊與西門子300 系列PLC 主站在Step7 軟件環境下的組態及軟件的調試以及提高系統可靠性的方法。
關鍵詞：C8051F020、SPC3、PROFIBUS、Step7、可靠性

An intelligent PROFIBUS slave design based on C8051F020 and SPC3 Author：Li Xiaohui, Zhang Huihui, Sun Shuwen Department: Mechatronics Control Laboratory, College of Mechanical Engineering & Applied Electronics Technology, Beijing University of Technology Abstract: PROFIBUS is most important and widely applied field bus in the industry field. Its applications make the process control more safe and reliable. Here, the design for the intelligent I/O slave based on C8051F020 and SPC3 is introduced. This kind of slave is designed for the shaftless printing machine, meeting the demand of modularization and reliability of industry filed. Furthermore, this paper illustrates the software environment of Step7 which is worked on series 300 of Siemens’s PLC. Finally, how to improve the reliability of slave practically is illustrated.
Keywords：C8051F020、SPC3、PROFIBUS、Step7、Reliability