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Documents EtherNet/IP通信适配器的软件设计与实现
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  • Author Author: sophie0love
  • Date Created: 15 Nov 2010 7:56 AM Date Created
  • Last Updated Last Updated: 9 Nov 2021 4:47 PM
  • Views 270 views
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EtherNet/IP通信适配器的软件设计与实现

本文以上海捷准工业自动化公司委托开发的“EtherNet/IP通信适配器开发”项目为背景,设计并实现一种基于EtherNet/IP工业以太网的通信适配器,该通信适配器作为EtherNet/IP控制网络与其他技术之间的一个网关,可将工业控制设备集成到EtherNet/IP工业以太网中,提高控制系统的灵活性和兼容性。 工业以太网技术和嵌入式技术都是当前应用研究的热点。本文在分析EtherNet/IP工业以太网技术和嵌入式系统发展的基础上,提出了一种工业以太网设备开发方案。该方案既满足了运行网络协议的功能要求,又适应了嵌入式系统采用32位微处理器及嵌入式操作系统的发展趋势,满足Ethernet/IP通信处理器对通信实时性、可靠性的近乎苛刻要求。 本文构建了以S3C2410 ARM9为核心的EtherNet/IP通信适配器的硬件系统,设计开发了该通信适配器的Boot Loader、I/O接口驱动程序等底层软件,成功移植Windows CE.NET嵌入式操作系统到该EtherNet/IP通信适配器的硬件平台。Boot Loader与硬件高度相关,担负着初始化系统硬件和引导操作系统的双重任务,是操作系统和硬件之间的联结纽带:而I/O接口驱动程序使操作系统自动识别外围数据采集设备,并为应用程序对底层设备的操控提供服务。 此外,本文在EADK(EtherNet/IP Adapter Developers Kit)软件协议栈的基础上编写了该EtherNet/IP通信适配器的应用程序,在应用层实现了CIP(控制与信息协议),保证网络上实时I/O数据和显式信息的有效传输,进行正确的控制;借助EIPScan软件、EDITT软件、ControlLogix PLC和PCU—ETHIOEtherNet/IP扫描器等工具对该通EtherNet/IP信适配器进行了完整的通信测试,结果表明该Ethernet/IP通信适配器在数据传输的实时性、稳定性、可靠性等方面有良好的性能。

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