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DCS基本结构的特点介绍

2021-10-27 12:57:47 来源:http://www.sdjkyqyb.com/ 53

系统主要有现场控制站(I/O站)、数据通讯系统、人机接口单元(操作员站OPS、工程师站ENS)、机柜、电源等组成。系统具备开放的体系结构,可以提供多层开放数据接口。
The system is mainly composed of field control station (I / O station), data communication system, man-machine interface unit (operator station OPS, engineer station ENS), cabinet, power supply, etc. The system has an open architecture and can provide multi-layer open data interfaces.
硬件系统在恶劣的工业现场具有高度的可靠性、维修方便、工艺先进。底层汉化的软件平台具备强大的处理功能,并提供方便的组态复杂控制系统的能力与用户自主开发专用高级控制算法的支持能力;易于组态,易于使用。支持多种现场总线标准以便适应未来的扩充需要。
The hardware system has high reliability, convenient maintenance and advanced technology in harsh industrial sites. The bottom Chinese software platform has powerful processing functions, and provides the ability to easily configure complex control systems and the support ability of users to independently develop special advanced control algorithms; Easy to configure and use. Support a variety of fieldbus standards to meet the needs of future expansion.
系统的设计采用合适的冗余配置和诊断至模件级的自诊断功能,具有高度的可靠性。系统内任何组件发生故障,均不会影响整个系统的工作。
The design of the system adopts appropriate redundancy configuration and self diagnosis function from diagnosis to module level, with high reliability. Failure of any component in the system will not affect the operation of the whole system.
浙大中控DCS卡件
系统的参数、报警、自诊断及其他管理功能高度集中在CRT上显示和在打印机上打印,控制系统在功能和物理上真正分散, DCS整个系统的可利用率至少为99.9%;系统平均无故障时间为10万小时,实现了核电、火电、热电、石化、化工、冶金、建材诸多领域的完整监控。
The parameters, alarm, self diagnosis and other management functions of the system are highly concentrated on CRT display and printer printing. The control system is truly decentralized in function and physics, and the availability of the whole DCS system is at least 99.9%; The average trouble free time of the system is 100000 hours, which realizes the complete monitoring in many fields such as nuclear power, thermal power, petrochemical, chemical industry, metallurgy and building materials.
域”的概念。把大型控制系统用高速实时冗余网络分成若干相对独立的分系统,一个分系统构成一个域,各个域共享管理和操作数据,而每个域内又是一个功能完整的DCS系统,以便更好地满足用户的使用。
Domain & rdquo; The concept of. The large-scale control system is divided into several relatively independent subsystems with high-speed real-time redundant network. One subsystem constitutes a domain, each domain shares management and operation data, and each domain is a DCS system with complete functions, so as to better meet the use of users.
网络结构可靠性、开放性及先进性。在系统操作层,采用冗余的100Mbps以太网;在控制层,采用冗余的100Mbps工业以太网,保证系统的可靠性;在现场信号处理层,12Mbps的PROFIBUS总线连接中央控制单元和各现场信号处理模块(I/O模块)。
Network structure is reliable, open and advanced. In the system operation layer, redundant 100Mbps Ethernet is adopted; In the control layer, redundant 100Mbps Industrial Ethernet is adopted to ensure the reliability of the system; In the field signal processing layer, 12mbps PROFIBUS bus connects the central control unit and each field signal processing module (I / O module).
标准的Client/Server结构。有的DCS的操作层采用Client/Server结构。
Standard client / server structure. The operation layer of some DCS adopts client / server structure.
开放并且可靠的操作系统。系统的操作层采用WINDOWS NT操作系统;控制站采用成熟的嵌入式实时多任务操作系统QNS以确保控制系统的实时性、安全性和可靠性。
Open and reliable operating system. The operating layer of the system adopts Windows NT operating system; The control station adopts the mature embedded real-time multitask operating system QNS to ensure the real-time, security and reliability of the control system.
标准的控制组态软件。系统采用IEC61131-3标准的控制组态工具,可以实现任何监测、控制要求。
Standard control configuration software. The system adopts the control configuration tool of IEC61131-3 standard, which can realize any monitoring and control requirements.
可扩展性和可裁剪性,保证经济性。
Scalability and tailoring to ensure economy.
网络构架
Network architecture
通常DCS系统的网络架构由3部分组成(不计现场仪表层),从上到下依次为管理网(MNET)、系统网(SNET)、控制网(CNET)。其中系统网和控制网都是冗余配置,管理网为可选网络。系统网络架构如图4-1-1所示。
Generally, the network architecture of DCS system consists of three parts (excluding the field instrument layer), which are management network (Mnet), system network (snet) and control network (CNET) from top to bottom. The system network and control network are redundant configurations, and the management network is an optional network. The system network architecture is shown in figure 4-1-1.
图4-1-1 分散控制系统DCS典型网络构架图
Figure 4-1-1 typical network architecture of DCS of distributed control system
管理网络(MNET)
Management network (Mnet)
由100/1000M以太网络构成,用于控制系统服务器与厂级信息管理系统(Real MIS或者ERP)、INTERNET、第三方管理软件等进行通讯,实现数据的高级管理和共享。管理网络层为可选网络层。
It is composed of 100 / 1000m Ethernet network, which is used for the communication between the control system server and the plant level information management system (real MIS or ERP), Internet, third-party management software, etc., so as to realize the advanced management and sharing of data. The management network layer is an optional network layer.
系统网络(SNET)
System network (snet)
由100/1000M高速冗余工业以太网络构成,用于工程师站、操作站、现场控制站、通信控制站的连接,完成现场控制站的数据下装。可快速构建星型、环型或总线型拓扑结构的高速冗余的安全网络,符合IEEE802.3及IEEE802.3u 标准,基于TCP/IP 通讯协议,通讯速率100/1000Mbps 自适应,传输介质为带有RJ45连接器的5类双绞线。
It is composed of 100 / 1000m high-speed redundant Industrial Ethernet network, which is used for the connection of engineer station, operation station, field control station and communication control station to complete the data download of field control station. It can quickly build a high-speed redundant security network with star, ring or bus topology, comply with IEEE802.3 and ieee802.3u standards, based on TCP / IP communication protocol, communication rate is 100 / 1000Mbps adaptive, and the transmission medium is class 5 twisted pair with RJ45 connector.
控制网络(CNET)
Control network (CNET)
采用冗余现场总线与各个I/O 模块及智能设备连接。实时、快速、高效地完成与现场通讯任务,传输介质为屏蔽双绞线或者光缆。
Redundant fieldbus is used to connect with each I / O module and intelligent equipment. Complete the field communication task in real time, quickly and efficiently, and the transmission medium is shielded twisted pair or optical cable.
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