在綜述DCS 和現(xiàn)場總線技術(shù)的基礎(chǔ)上，提出了多臺智能儀表控制系統(tǒng)的概念，利用
控制PC 機通過串行通信接口卡、RS-485 總線與智能儀表相連，構(gòu)建多智能儀表DCS 系統(tǒng)，分析了系統(tǒng)的結(jié)構(gòu)，提出了系統(tǒng)的通信協(xié)議，其控制對象既可以是實際的工業(yè)過程對象，也可以是被控對象模型系統(tǒng)。監(jiān)控軟件提供了明確的控制接口，可以方便地實現(xiàn)各種控制算法的控制實驗。
關(guān)鍵詞：智能儀表，集散控制系統(tǒng)（DCS），現(xiàn)場總線，通信協(xié)議，串行通信

Abstract ：A multi-intellectual-instrument DCS(distributed control system) with PC, serial
communication card, RS-485 bus and intellectual instruments is construct, which is based on
summarizing DCS and locale bus technology. The system structure is analyzed in the paper and its communication protocol is put forward. It can control not only some real objects but also the model-object system. The monitor software has been offered a clear interface for control experiments.
Keywords：DCS, intellectual instrument, serial communication