plc外文翻譯---談plc的應用與發(fā)展-plc設計(編輯修改稿)
2025-02-24 06:46 本頁面
【文章內(nèi)容簡介】 in all kinds of machinery, machine tools, robots, elevators, and other occasions. Process Control Refers to the process control temperature, pressure, flow simulation of the closedloop control. As industrial puter, PLC to the preparation of a variety of control algorithms procedures, plete closedloop control. PID regulator is generally closedloop control system used in more conditioning methods. PID modules are large and mediumsized PLC, the PLC also has many small feature of this module. PID is running for the processing of PID subroutine. Process control in the metallurgical, chemical, heat treatment, boiler control, and other occasions have a very wide range of applications. Data Processing Modern PLC with math (including matrix puting, puting functions, logic operation), data transmission, data conversion, sorting, lookup table, in operation, and other functions, to plete the data collection, analysis and treatment. These data can be stored in the memory of the reference value, the pletion of a control operation, can also use the munication sent to other intelligent devices, or print them tabulation. Data processing for largescale control systems such as unmanned control of flexible manufacturing systems。 can also be used for process control systems, such as paper making, metallurgy, food industry in some largescale control system. 4. PLC of the situation at home and abroad The world39。s first recognized the PLC is the 1969 . Digital Equipment Corporation (DEC) developed. Limited to conditions at the time of the ponents and puter development, early PLC mainly by discrete ponents and small and mediumscale integrated circuit ponents, can plete a simple logic control and timing, counting function. In the early 1970s a microprocessor. People will soon introduce its programmable logic controller, PLC an increase of puting, data transmission and processing functions, plete with a real puter features of industrial control devices. In order to facilitate familiar with the relay, contact the system engineering and technical staff, and the PLC adopt a similar ladder relay circuit as the main programming language, and will participate in the operation of the puter storage and processing ponents are named to the relay . At this time of the PLC for 第 頁 puter technology and relay the concept of bining conventional control of the product. China39。s introduction of the PLC, applications, development, production is acpanied by reform and opening up began. The first is the introduction of largescale use of the equipment in the PLC. Next in the production of business equipment and products continue to expand the application of the PLC. At present,
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