一种定位以太网控制器的新方法

A new approach to locate Ethernet-based controllers

随着网络技术的发展,以太网以其传输速度高、低耗、易于安装和兼容性好等优势,开始逐步进入工业控制领域。近年来在运动控制器领域新推出的基于以太网接口的独立式运动控制器就是以太网在工业控制领域的典型应用之一。此种应用场合,主控机和运动控制器均通过互联网作物理连接。主控机与控制器之间的指令和数据传输则须遵循以太网的通讯协议。由于主控机和目标运动控制器所处的网段可能连接有数百台网络设备,在传输指令和数据之前,必须解决在这数百台网络设备中找出所要控制的目标运动控制器,以便进一步实现主控机对目标运动控制器一对一地连接和控制。其中查找该目标运动控制器所耗的时间直接影响到运动控制器的控制速度和效率。本文在研究基于ICMP协议(Internet Control Message Protocol)和ARP协议(Address Resolution Protocol)的网络设备查找方法基础上,提出了一种新的高效、稳定的以太网控制器定位方法,并给出了相应的实验结果。

Information controlled devices such as Ethernet-based controllers are now widely used for developing next generation distributed controllers in industry.How to quickly and efficiently locate a specific controller which is connected to the Ethernet and currently on-line among hundreds of controllers tends to be the first and key issue for target control applications.Since any Ethernet based controller can be identified and accessed through its IP and unique MAC addresses,an optional way for this issue as mentioned can be worked out through programming based on ICMP or SMTP or TCP or ARP protocol.Here we present a new quick and effective way to locate a specific Ethernet based controller among hundreds of controllers through combined protocols.