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随着科学技术的不断进步,各行各业的生产机械也在不断向高自动化、高可靠性以及高技术的领域发展。可编程序控制器(PC)以其小巧、可靠、功能齐全和程序的编写及调试方便等优点,在现在的工业自动化生产中发挥着重要的作用。基于PC的集散型计算机自动控制系统的广泛应用,借助于数据通讯技术,促进了计算机网络的迅速发展,PC网络也属于其中的一种。
With the continuous improvement of science and technology, all kinds of production machinery in all walks of life are also constantly developing into the fields of high automation, high reliability and high technology. The programmable logic controller (PC) plays an important role in the present industrial automation production due to its small size, reliability, complete functions and convenient programming and debugging. PC-based distributed computer automatic control system is widely used, with the help of data communications technology to promote the rapid development of computer networks, PC networks are also one of them.