基于多种数据触发方式的DeviceNet从节点通信技术研究  

Research on communication technology of DeviceNet slave node based on different data trigger modes

作　　者：贾超[1] 陈在平[1] 张建峰[1] 

机构地区：[1]天津理工大学自动化学院,天津300191

出　　处：《仪器仪表学报》2009年第2期324-329,共6页Chinese Journal of Scientific Instrument

基　　金：天津市自然科学基金重点项目(07JCZDJC09600)资助

摘　　要：设计了一个采用CAN独立控制器SJA1000实现的DeviceNet现场总线通信节点。该节点可满足基于开关量与模拟量两种数据类型的输入输出功能,并同时支持轮询和位选通两种I/O数据的触发方式。给出了详细的硬件电路,提出了兼顾轮询和位选通两种方式的应用层实现方案。最后采用IXXAT公司的DNSDT协议分析软件和RockWell公司的主站设备对节点进行了测试,通过对实验数据的详细分析,证明本节点完全达到了DeviceNet规范要求,实现了不同数据触发方式下的智能从节点通信功能。A DeviceNet fieldbus communication node that adopts the separate CAN controller SJA1000 is designed in this paper. The node can meet the input and output demands of digital and analogue data types and support both poll and bit-strobe I/O data trigger modes. The design of the detailed hardware circuit is given, and the design scheme of the application layer that includes both poll and bit-strobe modes is also provided. Finally, node test was carried out using the DNSDT protocol analysis software and a master device from Rockwell. Test results prove that the node can meet the requirements of DeviceNet specifications completely and realize the communication function of intelligent slave node in different data trigger modes.

关 键 词：数据触发方式 DEVICENET SJA1000 现场总线 

分 类 号：TP393.2[自动化与计算机技术—计算机应用技术]