KOLLMORGEN 60WKS-CE240 22PB I/O设备为现场的输入

【功能描述】

KOLLMORGEN 60WKS-CE240 22PB在以后的近30年间，DCS先与成套设备配套，而后逐步扩大到工艺装置改造上，与此同时，也分成大型DCS和中小型DCS两类产品，使其性能价格比更具有竞争力。DCS产品虽然在原理上并没有多少突破，但由于技术的进步、外界环境变化和需求的改变，共出现了三代DCS产品。1975年至80年代前期为第一代产品，80年代中期至90年代前期为第二代产品，90年代中期至21世纪初为第三代产品。

KOLLMORGEN 60WKS-CE240 22PBDCS系统中，控制站作为一个完整的计算机，它的主要I/O设备为现场的输入、输出处理设备，以及过程输入/输出（PI/O），包括信号变换与信号调理，A/D、D/A转换。控制站是整个DCS的基础，它的可靠性和安全性最为重要，死机和控制失灵的现象是绝对不允许的，而且冗余、掉电保护、抗干扰、构成防爆系统等方面都应很有效而可靠，才能满足用户要求。

KOLLMORGEN 60WKS-CE240 22PB关于DCS控制站的系统软件，包括实时操作系统、编程语言及编译系统、数据库系统、自诊断系统等，只是完善程度不同而已。第二代DCS控制站开始有面向过程语言和高级语言；第三代DCS控制站的系统软件可以完成离线组态及在线修改控制策略。为了完成控制策略，对于顺序控制和批量控制组态编程，各种DCS控制站采用不同的方法。

KOLLMORGEN 60WKS-CE240 22PBDCS操作站具有操作员功能、工程师功能、通信功能和高级语言功能等，其中工程师功能中包括系统组态、系统维护、系统通用（Utility）功能，还有系统配置、操作标记、趋势记录、历史数据管理、总貌画面组态、控制站组态、工艺单元或区域组态等。

KOLLMORGEN 60WKS-CE240 22PB实际的DCS操作站是典型的计算机，它与控制站不同，有着丰富的外围设备和人机界面。在人机界面方面，逐渐过渡为以GUI图形用户界面为平台并采用鼠标，组态时制作流程图和控制回路图等采用菜单、窗口等，使人机界面友好。第三代DCS操作站是在个人计算机（PC）及Windows操作系统普及和通用监控图形软件已商品化的基础上诞生的。DDE或OPC接口技术，以太网接口与管理网络相连。DCS系统组态、操作站组态、控制站组态均有相应软件，为DCS用户的工程设计人员提供人机界面。有的DCS的采用通用监控图形软件，或以此类软件为核心，进行二次开发。

KOLLMORGEN 60WKS-CE240 22PB因为数据通信标准牵涉到网络结构、通信介质（信道）、通信协议、IEEE802.4令牌总线传输方式和IEEE802.5令牌环网传输方式的通信协议在DCS系统中应用最广，是否能够成为今后DCS的通讯标准，还有待观察。

KOLLMORGEN 60WKS-CE240 22PB I/O设备为现场的输入

KOLLMORGEN 60WKS-CE240 22PB In the next nearly 30 years, DCS is first matched with complete sets of equipment, and then gradually expanded to the process plant transformation, at the same time, it is also divided into large DCS and small and medium-sized DCS two types of products, so that the performance price is more competitive. Although there are not many breakthroughs in principle, there have been three generations of DCS products due to technological progress, changes in the external environment and changes in demand. From 1975 to the early 1980s it was the first generation of products, from the mid-1980s to the early 1990s it was the second generation of products, and from the mid-1990s to the early 21st century it was the third generation of products.

KOLLMORGEN 60WKS-CE240 22PBDCS system, the control station as A complete computer, its main I/O equipment for the field input and output processing equipment, as well as process input/output (PI/O), including signal conversion and signal conditioning, A/D, D/A conversion. The control station is the basis of the whole DCS, its reliability and safety are the most important, crash and control failure phenomenon is absolutely not allowed, and redundancy, power failure protection, anti-interference, constitute explosion-proof system and other aspects should be very effective and reliable, in order to meet user requirements.

KOLLMORGEN 60WKS-CE240 22PB System software about DCS control station, including real-time operating system, programming language and compilation system, database system, self-diagnosis system, etc., but the degree of perfection is different. The second generation DCS control station began to have process-oriented language and high-level language; The system software of the third generation DCS control station can complete off-line configuration and on-line modification of control strategy. In order to complete the control strategy, various DCS control stations adopt different methods for sequential control and batch control configuration programming.

KOLLMORGEN 60WKS-CE240 22PBDCS operation station has operator functions, engineer functions, communication functions and advanced language functions, among which engineer functions include system configuration, system maintenance, and system Utility functions. There are also system configuration, operation marking, trend recording, historical data management, overall picture configuration, control station configuration, process unit or area configuration, etc.

KOLLMORGEN 60WKS-CE240 22PB Actual DCS operating station is a typical computer, it is different from the control station, has a wealth of peripherals and human-machine interface. In the man-machine interface, gradually transition to the GUI graphical user interface as the platform and the use of mouse, the configuration of the production of flow charts and control loop diagrams using menus, Windows, etc., to make the man-machine interface friendly. The third generation DCS operating station was born on the basis of the popularity of personal computers (PCS) and Windows operating systems and the commercialization of general monitoring graphics software. DDE or OPC interface technology, Ethernet interface connected to the management network. DCS system configuration, operation station configuration, control station configuration have corresponding software, for DCS users to provide a man-machine interface. Some DCS use general monitoring graphics software, or such software as the core, secondary development.

KOLLMORGEN 60WKS-CE240 22PB Because the data communication standard involves the network structure, communication medium (channel), communication protocol, IEEE802.4 token bus transmission mode and IEEE802.5 token ring network transmission mode communication protocol in the DCS system is the most widely used. Whether it can become the communication standard of DCS in the future remains to be seen.

KOLLMORGEN 60WKS-CE240 22PB I/O设备为现场的输入

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