【正文】 我 們可以簡單將其物理結(jié)構(gòu)歸納為“三點(diǎn)一線”式的結(jié)構(gòu)。 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(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(duì)生產(chǎn)過程進(jìn)行集中監(jiān)測(cè)、操作、管理和分散控制的一種新型控制技術(shù)。s memory is checked etc. and operated. Communication operates the stage of serving: PLC and some intelligent object munication, the order that the response programmable device typed in, upgrade display content of the programmable device ,etc.. Content of operating etc. that PLC is in the state of stopping (STOP ) to 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。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 Ether of interface (MPI ) work more mainly now. 2. Design basic principle of PLC control system Meet the control request which is accused of the target maximumly. On the premise of meeting control request , is it make control system simple , economy , use and maintain convenient to make every effort. Guarantee the control system is safe and reliable. Consider the development of production and improvement of the craft should leave the surplus properly while choosing PLC capacity. 3. PLC software system and daily programming language PLC software system is made up of systematic procedure and 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 registe