集散控制系統(tǒng)外文翻譯-文庫吧資料
2025-05-21 14:33本頁面
【正文】 een to see the number of process variables with each state. This level be high in the armed forces, Colonel was. Its possession of power as needed to manually switch automatically at any time, modify the settings, adjust the control signals, control field devices to achieve the control of the production process. Management level Also known as the host puter, features, speed, large capacity. Through dedicated munication interface and highspeed data path connected, integrated surveillance system unit, and managing all system information. This is the highest whole plant floor automation systems. Only largescale distributed control system is qualified for this level. The military equivalent of the Marshal, they are for the user is a director, manager, chief engineer and other administrative or operational management personnel. It39。 A typical DCS control system DCS (Distributed control system) is a microprocessorbased centralized onitoring of the production process, operation, management, centralized and decentralized control of distributed control system, called DCS. The system will be used in a number of units distributed process control puter, all information through the munication work by the host management puter monitor, to achieve optimal control, the device inherits the conventional instrument distributed control and the advantages of puter control to overe the normal function of a single instrument, Human Machine Contact poor and the single risk of microputer control system of a high concentration of defects, both achieved in the management, operation and display of three concentrate, but also realized in functionality, load and risk of spread in three areas. DCS system in the modern production process control plays an important role. Distributed control systems typically have the following four ponents: Field control level known as data acquisition devices, mainly the noncontrol variables during data acquisition and preprocessing, and further processing of realtime data for the CRT display and print operation station, in order to achieve openloop monitoring, and collected data to monitoring puter. Output device in a PC case, or can switch analog signals the way the puter output to the terminal device control mands. This is one level directly to the scene, the process is connected with the site. Such as valves, motors, sensors, transmitters, actuators and so on. They are the basis for industrial field device, it is also the basis of DCS. In the DCS system, this level of function is to obey the mands sent by the host puter, w hile upwardbit machine feedback implemented. Take for example the armed forces to the case, can be described as the bottom of the soldiers. They just follow orders accurately a
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