plc和dcs_中英文翻譯_論文-資料下載頁

【導讀】engineerstanding.non-standardalgorithm,plicatedalgorithm.

　　

【正文】 only carry on the inside and to deal with and have the service of ports with outside. Deal with the inside when PLC is in the state of operating (RUN ) , setting up service of ports , proceduing inputting , procedure carrying out , proceduring to export outside, is been circulating and scanning the work all the time . 1, Input and deal with stage Input and deal with too and let introduction sample. At this stage, PLC is read into breaking the state openly of all input end sons by way of scanning, and store reading the information entered in the corresponding image register in the memory, inputting and videoing the register here and is broken, then enter the procedure and carry out stage. 2, The procedure carries out stage Carrying out stage in the procedure, PLC scans and carries out user39。s procedure sentence by sentence, meet and jump the order of rotating, according to shifting the trend that the condition decides the procedure. User39。s procedure involves until states of exporting of introduction , PLC reads on last stage and adopts the corresponding sub state of input end entered from inputting while videoing the register,to read the corresponding present state of videoing the register from exporting while videoing the register, carrying on logic operation according to user39。s procedure, the operation results is stored in in relevant device registers again. 3, Export the stage of breaking After the procedure finishes carrying out, convey the state of videoing the register of the ponent of all output relays to the corresponding output while latching the circuit, through isolating the circuit , to drive the power a mplification circuit , make the output end son export the control signal to the external world, form the actual output of PLC, drive the corresponding peripheral hardware. The structure PLC PLC is a real dedicated to the control of the puter industry, its hardware is basically the same microputer: 1, Central processing unit (CPU) Central processing unit (CPU) central processing unit (CPU) is the control center PLC. It PLC system in accordance with the procedures for the functions entrusted to receive and store programming from the user input devices and data。 Power check, memory, I / 0 and timer state of alert, and users can diagnose the procedures grammatical mistakes. 2, Memory storage system software Memory storage system software called System memory program memory. Storage application software known as the user program memory Memory 3, Power Power in the PLC system as a whole played a very important in the role. General AC voltage fluctuations in +10% (+15%), within can not take other measures to connect directly to the PLC to theAC Inter. 4, Input and output devices (I / O modules) I / O module is the scene UO CPU and other external devices or equipment connectivity between ponents. External input signal is transformed into a CPU can accept the signal, CPU or the output signal of the need to transform into a control signal to drive the control object, to ensure the normal work of the whole system. 5, Programming Programming device programmer users procedures applicable to the pilation, editing, debugging inspection and surveillance, You can also call its keyboard and display to the PLC within the state and some system parameters. Through munication port and the CPU link connecting plete manmachine dialogue. 6, External monitoring system equipment External PLC equipment are generally equipped with printers, EPROM writers, Highresolution color screen graphics such external monitoring system equipment. Main function of PLC PLC uses the face to be very wide, which develop very fast industrial automation device, to occupy the important position inside in the automation of the factory (FA ) and CIMS (CIMS ). PLC system is generally formed by following basic function: 1,Control the function: Logic control , controlling , counting numerical control and making regularly, the order is controlled. 2, Gather , store and deal with the function in data: Mathematical operation function , data processing , simulation data processing(whether PID , total mark strain wave). 3,Input / output the interface and recuperate the function: Having A/D, D/A changes the function, finishes the control on analog quantity and regulation through I/O module . Having temperature survey interface, it is even to connect various kinds of resistance or the electricity directly. 4, Communication , work savvy: Which Can carry on longrange I/O control, many sets of PLC can work between each other , munication, outside device can pile with one or many signal , preface of controller deal with the units, realize the procedure and data interchange. 5, The function of the manmachine interface: Offered to operators it in order to monitor the machine / the information of the course with essential work. Allow the operator , PC system and its application program interaction , in order to make decision and adjust. 6, Programming , debugging ,etc: Use plexity different hold , portabling and tabletop type programmable device , work station and operation are rejected , carry on programming , debug , monitor , test and write down, and type out the procedure file through the printer. 中文 DCS 原理與 PLC 基礎 DCS原理與 PLC基礎 DCS原理 集散控制系統 (DCS )是利用計算機技術對生產過程進行集中監測、操作、管理和分散控制的一種新型控制技術。 DCS是由計算機技術、信號處理技術、測量控制技術、通信網絡技術、 CRT技術、圖形顯示技術及人機接口技術相互滲透發展而產生的。 DCS既不同于分散的儀表控制，又不同于集中式計算機控制系統，而是克服了二者的缺陷而集中了二者的優勢，它集中了連續控制、批量控制、邏輯順序控制、數據采集等功能。 DCS的基本組成部分 系統的邏輯結構需要由物理結構實現。我 們可以簡單將其物理結構歸納為“三點一線”式的結構。“一線”是指其骨架計算機網絡，“三點”則是指連接在網絡上的三種不同類型的節點 :面向被控過程現場的現場 I/O控制站；面向操作人員的操作員站；面向 DCS監督管理人員的工程師站。 現場 I/O控制站 現場 I/O控制站是完成對過程現場 I/O處理并實現直接數字控制 DDC (Direct