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一、概述集散型控制系统是基于4C技术发展起来的一种综合控制系统.其中的—C就是CRT技术.不论是计算机控制系统,还是数据检测系统DAS,直接的流程画面都是必不可少的功能.也可以说,工业流程画面显示技术不仅把过去用数十平方米的模拟屏显示功能高度地集中到一个CRT监视器上,而且还将各调节仪表的功能也集中到CRT上.这样,使得操作工不需要时刻在排列的仪表盘上检查各仪表的数据,或巡视整个模拟屏来得到过程的运行情况,而只需要轻松地坐在CRT终端前面,就既可以观看整个流程的工作概况,又可以逐层细化入微,观察某个调节回路的工作细节.同时,DCS系统的流程画面技术还支持各种趋势线、历史线、棒图等功能.一个典型反应器流程画面如图1 所示.
I. Overview Distributed control system is based on 4C technology developed a comprehensive control system in which the CRT technology is -C. Whether it is computer control systems, or data detection system DAS, the direct process of the picture is essential Function.It can also be said that industrial process screen display technology not only in the past with dozens of square meters of analog screen display function is highly concentrated to a CRT monitor, but also to adjust the instrument functions are also concentrated on the CRT.Thus, So that the operator does not need to check the data of all the instruments on the dashboards arranged at all times or visit the entire simulation screen to obtain the operation of the process. Instead, the operator simply needs to sit in front of the CRT terminal to watch the working overview of the entire process , But also can be detailed layer by layer, observe the work of a regulatory loop details.At the same time, DCS system flow screen technology also supports a variety of trend lines, history lines, bar charts and other functions.A typical reactor flow chart in Figure 1 As shown.