| Profibus-DP单主站系统实时性研究 |
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| 引用本文： | 陈梅,姚启云,李鑫,陈薇,刘贞英.Profibus-DP单主站系统实时性研究[J].工矿自动化,2011,37(1):64-67. |
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| 作者姓名： | 陈梅 姚启云 李鑫 陈薇 刘贞英 |
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| 作者单位： | 合肥工业大学电气与自动化工程学院,安徽,合肥,230009 |
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| 基金项目： | 国家自然科学基金项目，安徽省高校优秀青年人才基金项目 |
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| 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。
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| 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 |
Research of Real-time Performance of Profibus-DP Single Master-station System |
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| CHEN Mei,YAO Qi-yun,LI Xin,CHEN Wei,LIU Zhen-ying.Research of Real-time Performance of Profibus-DP Single Master-station System[J].Industry and Automation,2011,37(1):64-67. |
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| Authors: | CHEN Mei YAO Qi-yun LI Xin CHEN Wei LIU Zhen-ying |
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| Affiliation: | (School of Electrical Engineering and Automation of Hefei University of Technology,Hefei 230009,China) |
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| Abstract: | 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. |
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| Keywords: | Profibus-DP |
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