DCS控制系统工程师站功能分析
摘要
分散控制系统（Distributed Control System，简称DCS）的出现是工业控制的一个里程碑。鉴于DCS的高可靠性等特点，能有效提高生产效率，目前我国新建的火力发电厂全都采用DCS作为控制系统。作为DCS的设计中心的工程师工作站（Engineering Work Station，简称EWS）在DCS中具有重要的地位，系统的分析其功能对于我们认识和更有效的使用EWS具有重要的意义。
本文首先系统的回顾了DCS的发展历史，介绍了DCS的基本概念和特点，着重介绍和分析了工程师站的特点、构成及其主要功能。
组态功能，是工程师站在应用中最主要的功能，是本文关注的焦点。
作为工程师站的“灵魂”——组态软件，将是本文关注的另一焦点。
最后，本文以美国贝利控制公司（Bailey Control Company）生产的INFI-90集散控制系统为例，简单介绍了该系统的组成，并详述了利用其系统工程工具——Composer组态简单控制逻辑的方法和过程，并简单介绍了一些INFI-90常用的系统功能码。
关键词：分散控制系统（DCS）；工程师站；组态设计；组态软件；功能码
A FUNCTIONAL ANALYSIS OF EWS OF DCS CONTROL SYSTEM
Abstract
Theemergence of Distributed Control System (DCS) is a milestone in industrial control. In view of the high-reliability of DCS, and other characteristics，can effectively increase productivity, at present, China's new thermal power plant are using DCS as their control system .As a design center of DCS,the EWS(Engineering Work Station) takes an important part in DCS, systematic analysis of its functions is of great significance to our understanding and more effective use of EWS.
First of all, the history of the development of DCS is reviewed, and, the basic concepts and features of DCS are introduced in this paper. The introduction and analysis of the Engineering Work Station‘s feature, structure and main function are focused.
The function of configuration, as the main function of the EWS in application, is the focus in this paper.
As the “soul”of EWS, the configuration software is the other focus in this paper.
Finally, takes INFI-90 Distributed Control System, which produced by Bailey Control Company in America as an example, this paper introduced the constitution of the system simply and details haw to use its system engineering tools—Composer, to constitute simple project and control logic. The INFI-90 system function codes in common usage are introduced in a nutshell.
Keywords: Distribute control system, Engineering work station, Configuration design, Configuration software, Function code
