可编程控制器是计算机技术与继电器常规控制技术相结合的产物，是以微处理器为核心，以数字控制为基础的特殊计算机，它具有工作可靠、使用灵活和功能齐全等优点，已应用于电力、纺织、机械、制造、化工和冶金等行业。特别是近几年来，随着计算机在操作系统、应用软件、通讯能力上的飞速发展、大大增强了PLC的通讯能力，丰富了PLC的编程软件和编程技巧，同时使PLC技术与通讯技术有机结合，使PLC向智能化、网络化发展，由原来的单机控制发展为多机控制、冗余控制、网络控制。现场总线技术是继气动仪表、电动单元模拟仪表、集中数字仪表、DCS后的新一代控制系统。由于它适应了工业控制系统的分散化、网络化、智能化的发展，给自动化的用户带来实惠和方便，促使目前生产的自动化仪表、DCS和PLC产品结构和功能的重大变革，导致工业自动化产品的更新换代，因而现场总线已经视为自动控制的技术热点，被誉为新世纪的新技术。《工业系统的网络化控制》主要将上位机的优化控制、现场总线的通讯网络和面向底层的PLC控制综合起来，对面向工业现场控制的集中体现，从整体上掌握过程控制的思路。《工业系统的网络化控制》主要面向工学硕士和工程硕士学生，该课程以工业系统的自动化应用为背景，将当今自动化领域的技术前沿介绍给学生。

Programmable logic controller(PLC) is the combination product of computer science and conventional relay control technology.It is a special computer which has micro processing core and bases on ditigal control.Also it has advantages of reliability,easy to use and kind of functions, which has a wide usage in electric power,weave,mechanism,manufacture,chemical industry and metallurgy.Especially in these years,with the fast development of operation system,application software and communication,it has great improvements in PLC communication,application software and software programming technique.At the same time,with the combination of PLC and communication technology,the intelligentized and networked developments appear in PLC.PLC has changed from stand-alone control system to multi control ,redundancy control and network control system.Field bus technology is the newer generation of control system,which accedes to pneumatic meters,electromotion analog apparatus and centralized digital instruments. It brings boon and convenience to automation users because it adapts to the development of decentralized,networked and intellectualized of industry control system. It also promotes the great innovation in the structures and functions of automation instruments,DCS and PLC products,which cause the regeneration of industry automation products. So field bus technology has been taken as the hotspot of automation control and been viewed as the new technology of 21 century.the networked control of industry system course is to integrate the optimization control of computer,communication network of field bus and PLC control closing to field devices.This course embodies the orientation to industry field control.It grasps the main idea of process control.the networked control of industry system course is open to engineer masters and industry masters.This course has the background of automation application in industry system,and it aims to bring the advanced technology of automation to students.