新闻资讯
网站首页 > 新闻资讯 >

DCS系统的特点

2021-11-19 09:19:08 来源:http://www.promaidmusic.com/ 53

DCS系统的关键是通信。也可以说数据公路是分散控制系统DCS的脊柱。由于它的任务是为系统所有部件之间提供通信网络,因此,数据公路自身的设计就决定了总体的灵活。数据公路的媒体可以是:一对绞线、同轴电缆或光纤电缆。
The key of DCS system is communication. It can also be said that the data highway is the backbone of DCS. Because its task is to provide communication network between all components of the system, the design of data highway itself determines the overall flexibility. The media of the data highway can be a pair of twisted pair, coaxial cable or optical fiber cable.
通过数据公路的设计参数,基本上可以了解一个特定DCS系统的相对优点与弱点。
Through the design parameters of data highway, we can basically understand the relative advantages and disadvantages of a specific DCS system.
(1)系统能处理多少I/O信息。
(1) How much I / O information can the system process.
(2)系统能处理多少与控制有关的控制回路的信息。
(2) How much control loop information related to control can the system process.
(3)能适应多少用户和装置(CRT、控制站等)。
(3) How many users and devices can be adapted (CRT, control station, etc.).
(4)传输数据的完整性是怎样检查的。
(4) How to check the integrity of the transmitted data.
(5)数据公路的允许长度是多少。
(5) What is the allowable length of the data highway.
(6)数据公路能支持多少支路。
(6) How many branches can the data highway support.
(7)数据公路是否能支持由其它制造厂生产的硬件(可编程序控制、计算机、数据记录装置等)。
(7) Whether the data highway can support the hardware produced by other manufacturers (programmable control, computer, data recording device, etc.).
为保证通信的完整,大部分DCS厂家都能提供冗余数据公路。
In order to ensure the integrity of communication, most DCS manufacturers can provide redundant data highway.
为了保证系统的性,使用了复杂的通信规约和检错技术。所谓通信规约就是一组规则,用以保证所传输的数据被接收,并且被理解得和发送的数据一样。
In order to ensure the reliability of the system, complex communication protocols and error detection technology are used. The so-called communication protocol is a set of rules to ensure that the transmitted data is received and understood as the transmitted data.
目前在DCS系统中一般使用两类通信手段,即同步的和异步的,同步通信依靠一个时钟信号来调节数据的传输和接收,异步网络采用没有时钟的报告系统。
At present, two kinds of communication means are generally used in DCS system, namely synchronous and asynchronous. Synchronous communication relies on a clock signal to regulate the transmission and reception of data, and asynchronous network adopts a reporting system without clock.
产品推荐
新闻推荐