分析了实时工业以太网的特点,提出一种时序特性分析系统,该系统硬件部分包括数据侦听器和监听计算机;软件部分是安装在监听计算机上的时序分析仪.数据侦听器是以现场可编程门阵列(FPGA,Field-Programmable Gate Array)为核心的硬件单元,主要功能是捕捉被监听链路上的数据帧,提取并封装原始帧的信息生成一个Probe帧,随后转发原始帧和Probe帧到监听计算机.Probe帧是提出的一种专门用于实时工业以太网时序和功能分析的以太网数据帧.时序分析仪解析Probe帧中封装的信息,按照用户设置进行计算统计后,以图形化的方式显示分析结果.最后,构建基于实时工业以太网EtherCAT的实验系统进行功能验证.实验结果表明,时序特性分析系统能够完成对实时工业以太网数据的在线捕捉和离线分析,并能清晰、直观的显示被监听链路和器件时序特性的解析结果. The characteristics of real-time industrial Ethernet are analyzed and a system for analyzing timing characteristics is proposed. The hardware part of the system includes data listener and monitoring computer. The software part is a timing analyzer installed on the monitoring computer. The data listener Field-Programmable Gate Array (FPGA) as the core hardware unit, the main function is to capture the data frame on the monitored link, extract and encapsulate the information of the original frame to generate a Probe frame, and then forward the original frame and Probe Frame to listen to the computer.Probe frame is proposed for a real-time industrial Ethernet timing and function analysis of Ethernet data frame timing analyzer parse Probe frame encapsulated information, calculated according to user settings, the statistics The way to display the results of the analysis.Finally, the experimental system based on real-time Industrial Ethernet EtherCAT is built for functional verification.Experimental results show that the timing analysis system can accomplish online capture and offline analysis of real-time industrial Ethernet data and can clearly, Intuitive display of the monitored link and device timing characteristics of the analytical results.