摘要
EPA标准是我国提出的一种工业以太网实时通信系统规范,适用于自动化仪器仪表之间以及工业自动化控制系统和仪器仪表间的通信。在介绍了通信协议模型以及设备间通信过程的基础上,对EPA协议栈进行了模块化设计,并重点叙述了通信调度实体的实现。基于ARM7和μC/OS-Ⅱ构建的平台,实现了数据采集装置的EPA通信。同时,这对EPA实时工业以太网通信协议的研究也具有重要的意义。
EPA Standard is an industrial Ethernet real-time communications specification that was proposed by China. It is suitable for communication among automation instrumentation, as well as industrial control system and instrumentation. On the basis of introduction of the communications protocol model and the communications process between devices, the modular design of EPA protocol stack is described, and the implementation of the communications scheduling entity is emphasized. The platform structured by ARM7 and μC/OS-Ⅱ, and EPA communication of the data acquisition device is realized. It is significant for researching EPA real-time industrial Ethernet communications protocol.
出处
《自动化仪表》
CAS
北大核心
2009年第12期1-5,共5页
Process Automation Instrumentation
基金
国家高技术研究发展计划资助项目(编号:2007AA041301)
上海市教育委员会和上海市教育发展基金会"晨光计划"资助项目(编号:09CG61)
