Profibus DP网络中EM277丢站因素分析及解决方案  

EM277 station missing factors of Profibus DP network analysis and solutions

作　　者：乔茜华 彭星星[2] 毛乾贝 王永华[1,3] 

机构地区：[1]郑州轻工业学院电气信息工程学院,河南郑州450002 [2]西北农林科技大学食品科学与工程学院,陕西西安712100 [3]纺织服装产业河南省协同创新中心,河南郑州451191

出　　处：《郑州轻工业学院学报（自然科学版）》2015年第2期93-98,共6页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：河南省产学研合作项目(132107000003);河南省科技成果转化项目(142201210006)

摘　　要：针对Profibus DP网络系统运行过程中的EM277丢站(通信中断)现象,基于搭建的Profibus DP网络实验平台,模拟其所处工作环境中的电磁干扰(EMI)、接地系统、网络参数设置等因素,并结合Profibus网络报文,对EM277丢站因素进行分析,提出应合理设置网络系统参数,加入中继器以实现信号的有效放大和再生处理,对网络设备与通信电缆进行屏蔽及正确接地以抑制EMI等解决方案.工程实例验证了该方案的可行性.According to station missing phenomenon of EM277（communication interruption）in the Profibus DP network system running process,based on the built Profibus network experiment platform,working envi-ronment factors such as the electromagnetic interference（EMI）,grounding system,the settings of network parameter and so on were simulated,and combined with Profibus network message analysis,the phenome-non of EM277 station missing was analyzed. The corresponding engineering solution was proposed：reasona-bly setting up network system parameters,adding repeaters to realized the effective amplification and regen-eration treatment,shielding and correcting grounding of network equipment and communication cables to in-hibit EMI. etc. The feasibility of the scheme was verified by engineering examples.

关 键 词：PROFIBUS DP 网络 EM277 丢站 电磁干扰 接地系统 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]