【正文】 o 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(chǔ) DCS原理與 PLC基礎(chǔ) DCS原理 集散控制系統(tǒng) (DCS )是利用計(jì)算機(jī)技術(shù)對生產(chǎn)過程進(jìn)行集中監(jiān)測、操作、管理和分散控制的一種新型控制技術(shù)。t generally be revised and produced automatically by the procedure. The characteristic of the template can carry on assignment with the parameter too. Configuration work and munication connect, the foundation of the munication is the configuration work in advance , is it is it establish one meet control sub work of scheme of you , set up work characteristic , set up work connect characteristic and connection station need of working any to want to that is to say. PLC foundation Operation principle of the controller that can programme PLC adopts the working way scanned in circulation, when PLC carries out user39。s procedure and data according to the function that the systematic procedure of PLC gives, gathered and input the state or data that the device sends here live by means of scanning, deposit register that stipulate , meanwhile , diagnose power and working state and grammar mistake ,etc. , programming of course of circuit inside the PLC. Enter after running, read the order one by one fro m user39。s station The operator of DCS deals with all functions of manmachine interface (MMIMan Machine Interface ) related to operating and operating at station, embody in and offer the manmachine interface for operating attendants mainly, enable operators to understand onthespot operation state , to present value of various kinds of operation parameters , and have unusual situations to take place etc. In time through operator39。 Facing the attenbant39。 2, the realtime data gathering our station are sent to operator39。s station and engineer, to finish one39。s procedure . The systematic procedure includes controlling procedure , piler , diagnostic program ,etc., used for manage the whole machine , translate the procedure language into a machine languaging mainly, diagnose the mechanical disorder. Systems soft ware offer by PLC producer and solidification among EPROM, can39。s procedure sentence by sentence, meet and jump the order of rotating, according to shifting the trend that the condition decides the procedure. User39?！耙痪€”是指其骨架計(jì)算機(jī)網(wǎng)絡(luò)，“三點(diǎn)”則是指連接在網(wǎng)絡(luò)上的三種不同類型的節(jié)點(diǎn) :面向被控過程現(xiàn)場的現(xiàn)場 I/O控制站；面向操作人員的操作員站；面向 DCS監(jiān)督管理人員的工程師站。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 amplification 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。t directly control outside load , can only make middle result to use while supporting CPU . PLC scans the incident according to circulation, carry out along the priority order of the laddershaped picture, result of the cycle stay in state of outputting temporarily in the person who deposit so value ordered to output can regard as terms use amon