【正文】 AS , Japan, Yokogawa39。 Non th rup the MAX1000, Foxbo ro39。 in the control software on the order of the introduction of PLC control and batch control, the DCS also has the function of PLC.Countries in the early 90s to the DCS are well known: 3000, Bailey39。s many panies introduced a new generation of distributed control system, whose main feature is a new system of local network using MA P Agreement。s N 90, Foxboro Cpect rum and the German pany Siemens Company Telepermm.With microputer and puter networks in particular, the rapid development of technology, coupled with fierce petition of the manufacturers, so that DCS quickly from the first generation of the 70s to the early 90s the development of the third generation of DCS. Although distribution systems before that the technical level is already high, but there is a major drawback is: the major panies introduced dozens of models of the system, almost all of the pany39。s DC201。s overall functionality and optimization.(6) control functional control algorithm rich set of continuous control, sequence control and batch control in one, can be realized cascade, feedforward, decoupling, adaptive and predictive control, advanced control, and easily add the necessary Special control algorithms. The position of DCS approach is flexible, managed by a dedicated puter stations, operator stations, engineering stations, recording station, site controller and data acquisition stations and other ponents, but also by a mon server, industrial puter and programmable controller was. At the bottom of the process control level are generally distributed onsite controllers, data acquisition stations, data acquisition and control in place, and through the data munications network to monitor and control level puter. Production control level on the data from the process control level centralized operations management, such as various optimization, statistical reports, fault diagnosis, alarm and so on. With the development of puter technology, DCS can follow a more highperformance needs and puter equipment connected through the network to achieve more advanced centralized management features, such as planning and scheduling, warehouse management, energy management.DCS in the development and application of state at home and abroadIn 1975, the largest . panies Honeyw ell instrument control to the world launched its first integrated distributed control system TDC2000 (Toal D ist ribu ted Con t ro l 2000), published in the system, immediately aroused the . industrial control munity highly, calling it the most inspiring event. Major panies around the world quickly followed, introduced one by one distribution system, from process control to enter a new era of distributed systems.During this period the Japanese Yokogawa introduced CEN TUM, the United States Taylor Instrument Company MO S203。s skeleton the system network, which is the foundation and core DCS. As the network of the system for realtime DCS, reliability and scalability, play a decisive role, so the manufacturers have been careful in this area of ??design. For the DCS system network, it must meet the requirements of realtime, that is pleted within defined time limits transmission of information. Here the word determine the time limit is in any case, the information transfer can be pleted within this time limit, and this time limit is based on realtime controlled process requirements identified. Therefore, indicators of network performance measurement system is not the network39。國(guó)外的有 西屋（艾默生）ovation、FOXBORO、ABB、西門子PCS霍尼韋爾、橫河DCS等。這里所提到的均為大型的DCS, 為了適應(yīng)市場(chǎng)的需要各廠商也開發(fā)了不少中小型的DCS 系統(tǒng)如S—9000,MAX—2, LXL ,A 2 PACS 等等。ouml?！　≈?0 年代初各國(guó)知名的DCS 有:3000, Bailey 的IN F I—90,Ro semoun t 的RS—3, W est Hoo se 的WDPF, L eeds amp。 引用智能變送器與現(xiàn)場(chǎng)總線結(jié)構(gòu)。盡管在這之前的集散系統(tǒng)的技術(shù)水平已經(jīng)很高, 但其中存在著一個(gè)最主要的弊病是: 各大公司推出的幾十種型號(hào)的系統(tǒng), 幾乎都是本公司的專利產(chǎn)品, 每個(gè)公司為了保護(hù)自身的利益, 采用的都是專利網(wǎng)絡(luò), 這就為全廠、全企業(yè)的管理帶來問題。 —400, 貝利公司的N —90, ?？怂共_公司的Cpect rum 和德國(guó)西門子公司的Telepermm。 , 費(fèi)雪爾公司的DCamp?！　≡诖似陂g有日本橫河公司推出的CEN TUM , 美國(guó)泰勒儀表公司的MO Samp。 Error! No bookmark name 在國(guó)內(nèi)外的發(fā)展與應(yīng)用狀態(tài)1975