甲乙丙丁各执一词东西南北各占一方。几年前,当现场总线大战硝烟正浓时,传统上用于办公室和商业的以太网却悄悄地进入控制领域。近来,以太网更是走向前台,发展迅速,颇引人注目。究其原因,一方面由于工业自动化向分布化、智能化的实时控制发展,通信已成为重中之重,用户对统一的通信协议和网络的要求日益迫切,另一方面Intranet/Internet等信息技术的飞速发展,要求企业从现场控制层到管理层实现全面的无 A, B, C, D, each with a party A few years ago, when the battle of fieldbus was fueled, the Ethernet traditionally used for office and commerce quietly entered the control space. Recently, Ethernet is to the foreground, the rapid development, rather compelling. The reason, on the one hand due to industrial automation to distribution, intelligent real-time control development, communication has become the top priority, users of unified communication protocols and networks increasingly urgent demand, on the other hand Intranet / Internet and other information technology The rapid development of enterprises from the scene to the control layer to achieve full management without