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The software of the DCS operation station should make a standard as soon as possible
Author: Professor Zhang Xinwei, 2004-9-15 16:23:00 published in: "Control Systems Forum" Total 0 replies, 159 views
Ms. Zhang Xinwei, deputy general manager, professor of Beijing Jing Youzhen Xu Technology Co., Ltd.; Mr. Chen Xudong, general manager. Keywords: DCS Operating Station Software Standards At present, computer control systems have basically achieved open, mainly due to DCS operation stations and controllers use a PC-based hardware structure. The operating system of the operating station uses Windows NT / 2000, and users want to develop a programming standard like IEC 61131. Because the programming environment of the controller is equipped with IEC 61131 standard, it can provide users with great convenience to the controller configuration. For DCS, in addition to the operating system, the software used in the system can be divided into 3 Most: (1) Tag database: including the input and output of the read system, the control loop, the database function extension, the communication of OPC data; (2) Show: including display dynamic flow chart, trend, alarm; (3) controller configuration platform: This part is called engineering station software, there is already IEC 61131 standard. The label database and display software are installed in the human-machine interface. Now that various software companies define the definition of the label, the description of the components and label databases and attributes is also defined by each home, so the user has to take a lot of time to master these configuration skills. , Learn the cumbersome tool measures, rather than use the time to use, and optimize control. When the user system is upgraded, the work of the operation station must be returned, such as mapping, text, no inheritance, each time you have to work. If you replace the system, it is also a re-made, even if you only replace the operation station, its workload is also very good. In fact, the control system is replaced, and the controlled object on site does not change. The valve is still a valve, the transmitter or transmitters, the pipeline or pipe. In general, the controlled object is constant, but the monitoring software of each system has changed its description. Even new projects, used transmitters, valves are also the same, as long as they specify their description, the old infrastructure project has some graphics can still be used in new projects. Even some inheritance, you can save many manpower. In addition, wasting is still in the time of new and old people, newcomers must re-learn, after a few years, they can go to form. If the old technician works in a standard environment, their work is easily transmitted to the new generation of technicians without having to repeat at a low level. Another reason for the need to develop standards is that due to DCS, PLC is associated with the enterprise local area network, if there are dozens of monitoring software, it is necessary to convert each other, and write a conversion software. Because the current software is "what you get", it brings a lot of trouble. This software said for conversion, it is not intended. If we use an XML (Extensible Markup Language) method, it enables developers to create markers based on logical content rather than format. This will make people and computers to more easily search for specific content-based information in the document, rather than just searching for a page. With the XML method, some ideas can be made. Therefore, there is no need to write so many software.
