可编程控制器在电梯上的应用和发展外文文献及翻译.doc

*大学*学院毕业设计(论文)有关外文翻译院系： 专业： 姓名: 学号： 指导教师： 完成时间： Application and development of programmable controller in elevatorAlong with the development of the ages, the technique that is nowadays is also gradually perfect, the competition plays more strong; the operation that list depends the artificial has already cant satisfied with the current manufacturing industry foreground, also cant guarantee the request of the higher quantity and high new the image of the technique business enterprise. The people see in produce practice, automate brought the tremens duos convenience and the product quantities for people up of assurance, also eased the personnels labor strength, reduce the establishment on the personnel, The target control of the hard realization in many complicated production lines, whole and excellent turn, the best decision etc., well trained operation work, technical person elor expert, governor but can judge and operate easily, can acquire the satisfied result. The research target of the artificial intelligence makes use of the calculator exactly to carry out, imitate these intelligences behavior, moderating the work through person sprain and calculators, with the mode that persons machine combine, for resolve the very complicated problem to look for the best pathWe come in sight of the control Thai links after the electric appliances in various situation, that is already the that time generation past, now of after use in the mold apery haps simple equipments of grass-roots control that the electric appliances can do for the low level only; And the PLC emergence also became the epoch-making topic, adding the vivid software control through a very and stable hardware, making the automation bead for tube new high tide.The PLC biggest characteristics lie in: The electrical engineering teacher already no longer electric hardware up too many calculations of cost, as long as order the importation that the button switch or the importation of the sensors order to link the PLC up can solve problem, pass to output to order the conjunction contact machine or control the start equipments of the big power after the elect recap pliances, but the exportation equipments direct con junction of the small power can. PLC internal containment have the CPU of the CPU, and take to have an I/O for expand of exterior to connect a peoples address and saving machine three big pieces to constitute, CPU core is from an or many is tired to add the machine to constitute, mathematics that they have the logic operation ability, and can read the procedure save the contents of the machine to drive the homologous saving machine and I/Os to connect after pass the calculation; The I/O add inner part is tired the input and output system of the machine and exterior link, and deposit the related data into the procedure saving machine or data saving machine; The saving machine can depositthe data that the I/O input in the saving machine, and in work adjusting to become tired to add the machine and |10s to connect, saving machine separately saving machine RAM of the procedure saving machine ROM and dates, the ROM can do deposit of the data permanence in the saving machine, but RAM only for the CPU computes the temporary calculation usage of hour of buffer space.The PLC anti- interference is very and excellent, our root need not concern its service life and the work situation bad, these all problems have already no longer become the topic that we fail, but stay to our is a concern to come to intern ales ounces of make use of the PLC to strengthen the control ability of the equipments for us, make our equipments more gentle.PLC language is not we imagine of edit collected materials the language or language of Cs to canny on weaving the distance, but the trapezoid diagram that the adoption is original after the electric appliances to control, make the electrical lent inhering teacher while weaving to write the procedure very easy comprehended the PLC language, and a lot of non electricity professional also very quickly know and go deep into to the PLC. Is PLC one of the advantage above and only, this is also one part that the people comprehend more and easily, in a lot of equipments, the people have already no longer hoped to see too many control buttons, they damage not only and easily and produce the artificial error easiest, small is not a main error perhaps you can still accept; But lead even is a fatal error greatly is what we cant is tolerant of. New technique always for bringing more safe and convenient operation for us, make we a lot of problems for face on sweep but light, do you understand the HMI? Says the HMI here you basically not clear what it is, also have no interest understanding, change one inside text explains it into the touch to hold or man machine interface you knew, it combines with tile PLC to our larger space.HMI tile control not only is reduced tile control press button, increase the vivid of the control, more main of it is can sequence of, and at can the change data input to output the feedback with data, control in the temperature curve of imitate but also can keep the manifestation of view to come out. And can write the function help procedure through a plait to provide the help of various what lies in ones power, the one who make operate reduces the otiose error. Contently the HMI factory is also more and more, the function is also more and more strong, the price is also more and more low, the noodles of the usage are wide more and more. The HMI foreground can say that think to be good very.At a lot of situations, the list is a smooth love mend that cant guarantee the equipments by the control of tile single machine, but pass the information exchanges of the equipments and equipments to attain the result that we warm For example for pack and the examination of the empress work preface, we will arrive wrapping information feedback to examine the place, and examine the information of the place to also want the feedback to packing. Pass the information share thus to make both the chain connect, becoming a total body, the match of your that thus make is more close, at each other attain to reflect the result that mutually flick.The PLC con-despondence has ahead come more body now its wllue, at the PLC and correspondence between PLCs, can pass the communication of the information and tile share of the dates to guarantee that of the equipments moderates mutually, the result that arrive already to repair with each other. Data conversion the adoption RS232 between PLC connect to come to the transmission data, but the RS232 pick up a people and can guarantee 10 meters only of deliver the distance, if in the distance of 1000 meters we can pass the RS485 to carry on the correspondence, the longer distance can pass the MODEL only to carry on deliver. The PLC data transmission is just to be called a formal to it in a piece of and continuous address that the data of the inner part delivers the other party, we, the PLC of the other play passes to read data in the watch to carry on the operation. If the data that data in the watch is a to establish generally, that is just the general data transmission, for example today of oil price rise, I want to deliver the price of the oilprice to lose the oil ally on board, that is the share of the data; But take data in the watch for an instruction procedure that controls the PLC, that had the difficulty very much, for example you have to control one pedestal robot to press the action work that you imagine, you will draw up for it the form that a procedure combine with the data sends out to pass by. The form thai information transport contain single work, the half a work and the difference of a workers .The meaning of the single work also is to say both, a can send out only, but a can receive only, for example a spy he can receive the designation of the superior only, but cant give the superior reply; A work of half is also 2 and can send out similar to accept the data, but cant send out and accept at the same time, for example when you make a phone call is to cant answer the phone, the other party also; But whole pair works is both can send out and accept the data, and can send outand accept at the same time. Be like the Internet is a typical example.The process that information transport also has synchronous and different step cent: The data line and the clock lines are synchronous when synchronous meaning lie in sending out the data. is also the data signal and the clock signals to be carry on by the CPU to send out at the same time, this needs to all want the specialized clock signal each other to carry on the transmission and connect to send, and is constrained,the characteristics of this kind of method lies in its speed very quick, but correspond work time of take up the CPU and also want to be long oppositely, at the same time the technique difficulty also very big. Its request lies is can not have an error margins in a darns deliver, otherwise the whole piece according to compare the occurrence mistake, this on the hardware is a bigger difficulty. Applied more and more extensive in some appropriative equip menses, be like the appropriative medical treatment equipments, the numerical signal equipments.etc., in compare And the different step is an application tile most extensive, this receive benefit in it of technique difficulty is opposite and want to be small, at the same time not need to prepare the specialized clock signal, its characteristics to lie in, its data is partition, the long-lost send out and accept, be the CPU is too busy of time can grind to a stop sex to work, also reduced the difficulty on the hardware, the data throw to lose at the same time opposite want to be little, we can pass the examination of the data to observe whether the data that we send out has the mistake or not, be like strange accidentallythe method, tired addition and eight efficacies method etc., can use to helps whether the data that we examine to send oat have or not the instate accidence, pass the feedback to carry on the discriminator. A line of transmission of the information contain a string of and combine the cent of: The usual PLC is 8 machines, certainly also having 16 machines. We can be an at the time of sending out the data a send out to the other party, also can be 88 send out lye dais to the other party, an and 8 different antinodes are also the as that we say to send out the data and combine sends out the data. A speed is more and slowly, but as long as 2 or three lines can solve problem, and Call use tile telephone line to carry on the long range control. But combine the ocular transmission speed is very quick of, it is a string of so collar of 25600%, occupy the advantage in the short distance, the in view of the fact TTL electricity is even, being limited by the scope of one meter generally, it combine unwell used for the data transmission of the long pull, thus the cost is too expensive.Under a lot of circumstances we are total to like to adopt the string to combine the conversion chip to carry on deliver, under this kind of circumstance not need us to carry on to deposited the machine to establish too and complicatedly, but carry on the data exchanges through the data transmission instruction directly, but is not a very viable way in the correspondence, because the PEC of the other party must has been wait for your data exportation at the time of sending out the data, it cant do other works.When you are reading the book, you hear someone knock on door, you stop to start up of affair, open tile door and combine to continue with the one who knock on door a dialogue, tile telephone of this time rang, you signal hint to connect a telephone, after connecting the telephone through, remora overdo come together knock on door to have a conversation, after dialogue complete, you continue again to see your book, this kind of circumstance we are called tile interruption to it, it has the authority, also having sex of have tile initiative, the PLC had such function .Its characteristics lie in us and may meet the urgently abrupt affairs in the operation process of the equipments, we want to stop to start immediately up of work, the whereabouts manages the more important affair, this kind of circumstance is we usually meet of, PLC while carry out urgent mission, total will keep the current appearance first, tar example lye address of tile procedure, CPU of tired add tile machine data etc., be like to stick down whichthe book that we see is when we open the door the page or simply make a mark, because we treat and would still need to continue immediately after book of see the behind. The CPU always does the affair that should do according to our will, but your mistake of give it an affair, it also would be same Io do. this we must notice. The interruption is not only a, sometimes existing jointly with the hour several inside break, break off to have the preferred Class, they will carry out the interruption of the higher Class according to persons request. This kind of breaks off the medium interruption to also became to break off the set. The Class that certainly break off is relevant according to various resources of CPU with internal PLC, also following ahead of capacity size of also relevant fasten.The contents that break off has a lot of kinds, for example the exterior break off, correspondence in of send out and accept the interruption and settle and tile clock that count break off, still have the WDT to reset the interruption etc., they enriched the CPU to respond to the category while handle various business. Speak thus perhaps you cant comprehend the internal structure and operation orders of the interruption completely also, we do a very small example to explain.Each equipments always will not forget a button, it also is at we meet the urgent circumstance use of, that is nasty to stop the button. When we meet the Human body trouble and surprised circumstances we as long as press it, the mach insteps all operations immediately, and wait for processing the over surprised empress recover the operation again. Nasty stop the internal 1/ O of the internal CPU of the but tomcod junction PLC to connect up, be to press button an exterior to trigger signal for CPU, the CPU carries oi1 to the I/O