PROFIBUS-DP现场总线通信协议  

Communication protocol of PROFIBUS-DP

作　　者：何波丽[1] 李胜旺[1] 

机构地区：[1]河北科技大学信息科学与工程学院,河北石家庄050018

出　　处：《河北工业科技》2009年第5期349-352,共4页Hebei Journal of Industrial Science and Technology

摘　　要：以开放式系统互联模型ISO/OSI为参考,描述了PROFIBUS-DP现场总线通信协议的结构,包括物理层的数据传输介质与数据传输格式,数据链路层的数据报文与数据传输服务调用方法及可用的传输服务。介绍了PROFIBUS-DP通信协议芯片SPC3的结构特点和功能,给出了SPC3与单片机AT89S52的接口电路图和相关的软件流程图。According to the ISO/ OSI reference model,the structure of the communication protocol of PROFIBUS-DP was described,including data transfer technology and message format of the physical layer,the data transmission messages and the defined functions of the data link layer,and the available transmission services.The structure and function of the PROFIBUS-DP communication chip SPC3 were introduced.The interface circuit diagram between SPC3 and singlechip AT89S52 and the flow chart of the software were put forward.

关 键 词：现场总线 PROFIBUS-DP协议 SPC3 

分 类 号：TP336[自动化与计算机技术—计算机系统结构]