摘要
以开放式系统互联模型ISO/OSI为参考,详细描述了PROFIBUS现场总线报文规范协议的结构,包括物理层的数据传输技术、数据链路层的报文通信格式、应用层的FMS服务以及用户接口中定义的FMS行规。研究了PROFIBUS-FMS的总线配置,在此基础上提出了以协议芯片SPC4为核心,开发FMS智能从站的方法,并就FMS从站的软件流程进行了阐述。
This paper introduces the structure of the communication protocol of PROFIBUS-FMS which includes the data transfer technology of the physical layer, the message format of the data link layer, the FMS service of the application layer and the FMS profile of the user interface. The distribution of the fieldbus is also discussed. A method for developing FMS intelligent slaves by using the protocol chip SPC4 is proposed.
出处
《自动化技术与应用》
2008年第9期89-91,88,共4页
Techniques of Automation and Applications
