Profibus-DP单主站系统实时性研究  

Research of Real-time Performance of Profibus-DP Single Master-station System

作　　者：陈梅[1] 姚启云[1] 李鑫[1] 陈薇[1] 刘贞英[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《工矿自动化》2011年第1期64-67,共4页Journal Of Mine Automation

基　　金：国家自然科学基金项目(61004082);安徽省高校优秀青年人才基金项目(2009SQR2014)

摘　　要：分析了Profibus-DP协议数据链路层的运行机理,详细描述了构成Profibus-DP总线周期的时间参数,给出了报文循环时间、令牌目标轮转时间和系统反应时间这三个Profibus-DP系统实时性能指标的具体计算公式,并结合Profibus-DP单主站系统实例,通过测算系统反应时间分析了影响Profibus-DP单主站系统实时性的因素,最后提出可通过提高通信速率、减少从站数量、减少交换数据量来提高Profibus-DP单主站系统实时性。The paper analyzed operating mechanism of data link layer of Profibus-DP protocol, described time parameters that compose Profibus-DP bus cycle in details, and gave concrete calculating formulas of real-time indexes of Profibus-DP system named message cycle time, token target rotation time and system reaction time. Combining an example of some Profibus-DP single master-station system, it analyzed factors which affect real-time performance of Profibus-DP single master-station system through calculating system reaction time, and finally proposed methods to improve real time performance of Profibus-DP single master-station system, including improving communication speed and decreasing number of substations and changed data.

关 键 词：PROFIBUS-DP 单主站系统 实时性 报文循环时间 令牌轮转时间 系统反应时间 

分 类 号：TD655[矿业工程—矿山机电]