WETSO D201126 分散控制系统 应用于各种过程自动控制系统

D201126   分散控制系统

1、基本概念
分散控制系统英文简称为DCS (Distributed Control System),賂分散布置、 集中控制的特点，应用于各种过程自动控制系统。
2、DCS系统的组成
DCS系统由硬件和软件两大部分组成。
(1)硬件包括:工程师站、操作员站、历史站、I/O卡件、通讯卡件、现场控制站等。工程师站和操作员站本身就是电脑，之所以叫不同的名称，是因为每一台电脑安装的软件和具 备的功能不同，在实际应用中充当的角色也不同，同时代表着权限的不同。
①工程师站:简称ENG,是电脑安装了组态软件,是现场专业工程师用于编写、修改控制逻辑程序，包括修改图形、参数设置、数据库组态、离线查询等等，它的权限高于操作员站，可把它比作“后台”理解。
②操作员站:简称OPS或OPU,是电脑安装了操作员软件,它是生产工艺系统的操作员用于监视、操作调整、在线查询、报警等等，它的权限要低于工程师站，可把它比作“客户端”理解。

1. Basic concepts
Distributed Control System, abbreviated as DCS (Distributed Control System) in English, has the characteristics of decentralized layout and centralized control, and is applied to various process automatic control systems.
2. Composition of DCS system
The DCS system consists of two major parts: hardware and software.
(1) Hardware includes: engineer station, operator station, history station, I/O card, communication card, on-site control station, etc. The engineer station and operator station themselves are computers, so they are called different names because each computer has different installed software and functions, and plays different roles in practical applications, representing different permissions.
① Engineer station: abbreviated as ENG, it is a computer installed configuration software used by on-site professional engineers to write and modify control logic programs, including modifying graphics, parameter settings, database configuration, offline queries, etc. Its authority is higher than that of the operator station, and it can be compared to "backend" understanding.
② Operator station: abbreviated as OPS or OPU, it is a computer with operator software installed. It is used by operators of the production process system for monitoring, operation adjustment, online query, alarm, etc. Its permissions are lower than those of the engineer station, and it can be compared to a "client" for understanding.