PLC外文翻译---PLC应用于电梯的发展趋势
毕业论文（设计）
外文翻译
题目：PLC应用于电梯的发展趋势
系部名称：***专业班级：***
学生姓名：***学号：***
指导教师：***教师职称：工程师
2011年月日
PLC应用于电梯的发展趋势
（PLC）是以计算机技术为核心的通用自动控制装置，在各行各业中得到了广泛的应用。在电梯行业中，PLC的作用得到了充分的体现。本文介绍了PLC控制的五层电梯模型的构成、主要功能、PLC的I/O接口分配、PLC的编程方法及对电梯系统的程序设计等。通过对电梯控制系统的程序设计，实现了电梯的开关门控制以及在电梯运行方式下电梯的呼叫显示、上下行、起动、延时关门、平层、停靠开门、信号排队、顺向截梯和报警等控制功能。通过对软件程序的编译、硬件的连接以及电梯模型与PLC控制系统的联调，使得控制系统在电梯模型运行过程中直观的体现出来，实现了对电梯功能的控制。
21世纪将会发展多用途、全功能的塔式建筑，超高速电梯继续成为研究方向。曳引式超高速电梯的研究继续在采用超大容量电动机、高性能的微处理器、减振技术、新式滚轮导靴和安全钳、永磁同步电动机、轿厢气压缓解和噪声抑制系统等方面推进。采用直线电机驱动的电梯也有较大研究空间。未来超高速电梯舒适感会有明显提高。
电梯是标志现代物质文明的垂直运输工具、是机—电一体化的复杂运输设备。它涉及电子技术、机械工程、电力电子技术、微机技术、电力拖动系统和土建工程等多个科学领域。目前电梯的生产情况和使用数量已成为一个国家现代化程度的标志之一。
本次设计主要将可编程序控制器（PLC）和计算机应用到电梯的控制系统中去，以五层电梯为例来完成单台电梯PLC控制系统的总体设计方案、组成及模块化程序设计。通过三菱FX2N与计算机通信来实现对电梯系统运行的控制。首先确定电梯类型为客货两用梯，电梯载重量为1000千克，梯速为1.5米/秒，曳引电动机的转速为1000转/秒；再根据串联阻抗前后电动机的机械特性，选择合适的电梯速度控制曲线，实现电梯的交流调速；其次是电梯运行控制部分设计，包括轿厢门控制电路、平层控制电路、显示电路、集选控制电路、电梯消防运行回路；输入口计算点为58，输出口计算点数为35，选用三菱FX2-80MRPLC型的PLC，并进行了外围接线设计；最后进行软件编程。
随着经济发展，高层建筑的日益增多，电梯已经成为人们日常生活中不可缺少垂直交通工具。更好的满足用户的要求，开发出高安全性、高可靠性、高效、低能耗、乘坐舒适的电梯，是国内外各电梯生产企业和研究机构的主要目标。其中电梯控制系统的开发是达到以上目标的最重要途径。工业自动化技术的飞速发展为电梯控制系统的技术更新提供了物质基础。不断的将工业控制领域最先进的技术和产品引入到电梯控制中，是电梯行业技术开发最重要和最有效的手段。本文将可编程计算机控制器——PCC，这一集计算机技术、通讯技术、自动控制技术为一体的工业控制领域的新型工业控制装置，应用
于电梯控制中。在对我国电梯行业的技术现状和发展趋势的详细分析的基础上，本文采用B&R 2005 PCC作为电梯的主控制系统，完成了一个12层站集选控制客梯的硬件系统和软件控制程序的设计，利用PCC自身所具备的逻辑运算和数据处理功能，通过适当增加输入／输出点和编制PCC控制程序，使本系统具有对电梯运行进行故障监测和诊断的功能，并进一步介绍了PCC控制系统在电梯的远程监控中的应用。
PLC（可编程控制器）作为一种工业控制微型计算机，它以其编程方便、操作简单尤其是它的高可控性等优点，在工业生产过程中得到了广泛的应用。它应用大规模集成电路，微型机技术和通讯技术的发展成果，逐步形成了具有多种优点和微型，中型，大型，超大型等各种规格的系列产品，应用于从继电器控制系统到监控计算机之间的许多控制领域。随着社会的不断发展，楼房越来越高，而电梯成为了高层楼房的必须设备。电梯从手柄开关操纵电梯、按钮控制电梯发展到了现在的群控电梯，为高层运输做出了不可磨灭的贡献。PLC在电梯升降控制上的应用主要体现在它的逻辑开关控制功能。由于PLC具有逻辑运算，计数和定时以及数据输入输出的功能。在电梯升降过程中，各种逻辑开关控制与PLC很好的结合，很好的实现了对的控制。
可编程控制器是60年代末在美国首先出现的，当时叫可编程逻辑控制器PLC （ProgrammableLogicController），目的是用来取代继电器。以执行逻辑判断、计时、计数等顺序控制功能。提出PLC概念的是美国通用汽车公司。PLC的基本设计思想是把计算机功能完善、灵活、通用等优点和继电器控制系统的简单易懂、操作方便、价格便宜等优点结合起来，控制器的硬件是标准的、通用的。根据实际应用对象，将控制内容编成软件写入控制器的用户程序存储器内,使控制器和被控对象连接方便。
70年代中期以后，PLC已广泛地使用微处理器作为中央处理器，输入输出模块和外围电路也都采用了中、大规模甚至超大规模的集成电路，这时的PLC已不再是仅有逻辑(Logic)判断功能，还同时具有数据处理、PID调节和数据通信功能。国际电工委员会(IEC)颁布的可编程控制器标准草案中对可编程控制器作了如下的定义：可编程控制器是一种数字运算操作的电子系统，专为在工业环境下应用而设计。它采用了可编程序的存储器，用来在其内部存储执行逻辑运算，顺序控制、定时、计数和算术运算等操作的指令，并通过数字式和模拟式的输入和输出，控制各种类型的机械或生产过程。可编程控制器及其有关外围设备，易于与工业控制系统联成一个整体，易于扩充其功能的设计。
可编程控制器对用户来说，是一种无触点设备，改变程序即可改变生产工艺。目前，可编程控制器已成为工厂自动化的强有力工具，得到了广泛的普及推广应用。
可编程控制器是面向用户的专用工业控制计算机，具有许多明显的特点。
①可靠性高，抗干扰能力强；
②编程直观、简单；
③适应性好；
④功能完善，接口功能强。
PLC的最大特点在于：电气工程帅已不在电气的硬件上花费太多的心计，只要将按钮开关或感应器的输入点连接到PLC的输入点上就能解决问题，通过输出点连接接触或继电器来控制人功率的启动设备，而小功率的输出设备直接连接就可以。
PLC的内部包含了具有中央处理器的CPU，并带有外部I／O口扩展的I／O接口地址和存储器三大块组成，CPU的核心是由一个或多个累加器组成，它们具有逻辑的数学运算能力，并能读取程序存储器的内容通过计算后去驰动相府的存储器和I／O接口；I ／O 口将内部累加器和外部的输入和输出系统连接起来，并将利关的数据存入程序存储器或者数据存储器中：存储器可以将I／O 口输入的数据存入存储器中，并在工作时训调转到累加器和I／O接口上，存储器分程序存储器ROM和数据存储器RAM，ROM可以将数据永久的存入存储器巾，而RAM只能作为CPU计算时临时计算使用的缓冲空间。
PLC抗干扰是极其优秀的，我们根本不用去关心它的使用寿命和工作场合的恶劣，这些所自的问题已不再成为我们失败的主题，而留给我们的是关心如何来利用PLC的内部资源为我们加强设备的控制能力，使我们的设备更加的柔性。
PLC的语言并不是我们所想象的汇编语言或C语言来进行编程，而是采用原有的继电器控制的梯形图，使得电气工程师在编写程序时很容易就理解了PLC的语言，而且很多的非电气专业人士也对PLC很快认识并深入。
This paper levelt PLC application in elevator trend and development
PLC application in the development trend of the elevator
Programmable Logic Controller (PLC) is a common control device which use computer technology as a core, PLC gets a wide range of applications in all walks of life. In the elevator industry, PLC’s role has been fu lly expressed. This paper introduces the PLC-controlled model of a five-story elevator，include it’s composition, main function, the I/O interface distribution of the PLC, the PLC’s programming methods and procedures design of the elevator system. With proc edures design of the elevator control system can achieve the elevator door’s opening
and closing control, and the elevater’s indication under the call, moving from top to bottom, starting-up, delay closed, Ping layer, opening the door, making signals in the queue, close to the escalator and alarming control under the mode of the elevator’s operation mode. Through the process of compiling software, hardware connection and the conjunction of elevator model and the PLC control system, which makes the elevator control system model intuitive reflected in the course of operation and realized the elevater’s functional control.
The 21st century will develop multipurpose, full-featured tower building, ultra-high speed elevator continue to become the research direction. Traction type super-fast elevator research continues to super capacity motor, high performance by the microprocessor, damping technology, new roller guide boots and security clamp, permanent magnet synchronous motor, elevator car air pressure relief and noise suppression systems propulsion. Using the linear motor drive there is also a greater research space elevator. Future super-fast elevator intimacy will have increased significantly.
Elevator iWith economic development, the increasing number of high-rise buildings, elevators have become indispensable in daily life the vertical transport. Better meet user requirements, development of high security, high reliability, high efficiency, low energy consumption, ride comfort of the elevator, the elevator is the domestic and foreign enterprises and research institutions the main objective.Elevator control system which was developed to achieve these objectives, the most important ways. The rapid development of industrial automation technology for the elevator control system technology update provides the material base. Continue to be the most advanced areas of industrial control technology and products introduced to the elevator control, elevator industry, technology development is the most important and effective means.This article programmable computer controller - PCC, the computer technology, communication technology, automatic control technology for the integration of new areas of industrial control industrial control device, used in the lift control.In China's elevator industry, technology status and development trend of the detailed analysis, based on this paper, B & R 2005 PCC as the elevator's main control system, completed a 12-storey station set selective control passenger elevators in the hardware and software control program design , the use of PCC its own has the logic operation and data processing functions, through appropriate increase in input / output point and the preparation of PCC control procedures, so that the system has run for the elevator fault monitoring and diagnosis functions, and further information on the PCC control system Elevator Remote Monitoring.s in close connection with the machinery of large-scale electrical machinery and electronic products. Mainly by the room, Wells Road, Car, door systems and electrical control
system. Accompanied by the development of the construction industry, to provide for the construction of the elevator up and down traffic and transport industries are developing rapidly. Elevator is not only an important link in the production of equipment, but also a life of work and the necessary equipment, can be expected that, with the development of society, elevator products in people's material and cultural life and the car will be has become one of the important transportation equipment.
The design mainly PLC (PLC) and computer application to the elevator control system, and to five-story elevator as an example to complete a single lift PLC program control system design, composition and modular program design . Mitsubishi FX2N through computer communications and to achieve operation of the elevator control system
PLC (programmable controller) takes one industrial control microcomputer, it is convenient by its programming, simplicity of operator its merits and so on high controllability, obtained the widespread application particularly in the industrial production process. It applies the large scale integrated circuit, the miniature machine technology and the mechanics of communication development achievement, formed gradually had many kinds of merits and miniature, medium, large-scale, the ultra-large type and so on each kind of specification's serial products, applied to monitors between computer's many control domain from the black-white control system. Along with society's unceasing development, the building is getting higher and higher, but the elevator became the high-level building to the equipment. The elevator from the handle switch operation elevator, the push-button control elevator develops to present's group control elevator, has made the indelible contribution for the high-level transportation. PLC mainly manifests in the elevator cuing control's application in its logical switch control function. Because PLC has the logic operation, counting and fixed time as well as data feeds output function. In the elevator rises and falls in the process, each logical switch control and the PLC very good union, very good have realized to the fluctuation the control.
This article main discussion studies uses Simens in the S7-200 PLC to carry on the control to elevator's fluctuation, forms the lift control system.
PLC Introduction Programmable controller is the first in the late 1960s in the United States, then called Plc programmable logic controller (ProgrammableLogicController) is used to replace relays. For the implementation of the logical judgement, timing, sequence number, and other control functions. The concept is presented Plc General Motors Corporation. Plc and the basic design is the computer functional improvements, flexible, generic and other advantages and relay control system simple and easy to operate, such as the advantages of cheap prices combined controller hardware is standard and overall. According to the practical
application of target software in order to control the content of the user procedures memory controller, the controller and connecting the accused convenient target. In the mid-1970s, the Plc has been widely used as a central processing unit microprocessor, import export module and the external circuits are used, large-scale integrated circuits even when the Plc is no longer the only logical (IC) judgement functions also have data processing, PID conditioning and data communications functions. International Electrotechnical Commission (IEC) standards promulgated programmable controller for programmable controller draft made the following definition : programmable controller is a digital electronic computers operating system, specifically for applications in the industrial design environment. It used programmable memory, used to implement logic in their internal storage operations, sequence control, timing, counting and arithmetic operations, such as operating instructions, and through digital and analog input and output, the control of various types of machinery or production processes. Programmable controller and related peripherals, and industrial control systems easily linked to form a whole, to expand its functional design. Programmable controller for the user, is a non-contact equipment, the procedures can be changed to change production processes. The programmable controller has become a powerful tool for factory automation, widely popular replication. Programmable controller is user-oriented industries dedicated control computer, with many distinctive features. First, high reliability, anti-interference capability; Second programming visual, simple; Third, adaptability good; ④functional improvements, strong functional interface
PLC language is not we imagine of edit collected materials the language or language of Cs to cany on weaving the distance, but The PLC biggest characteristics lie in: The electrical engineering teacher already no longer electric hardware up too many calculationses 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 poweraftertheelectricappliances,butthe exportation equipments direct conjuuctiou 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 people's 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 deposit
the 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 datas, the ROM can 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 internal
resources of make use of the PLC to strengthen the control ability of the equipments for us, make our equipments more gentle. the trapezoid diagram that the adoption is original after the electric appliances to control, make the electrical
engineering 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.
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2011年03月11日
PLC外文翻译
外文翻译 原文：The open system merit of Computer Numerical Control The open system merit is the system simple, the cost low, but the shortcoming is the precision is low. The reverse gap, the guide screw pitch error, stop inferiorly can affect the pointing accuracy by mistake. Following several kind of improvements measure may cause the pointing accuracy distinct improvement. 1. reverse gap error compensates The numerical control engine bed processing cutting tool and the work piece relative motion is depends upon the drive impetus gear,the guide screw rotation, thus the impetus work floor and so on moves the part to produce moves realizes. As traditional part gear, guide screw although the manufacture precision is very high, but always unavoidably has the gap. As a result of this kind of gap existence, when movement direction change, starts the section time to be able to cause inevitably actuates the part wasting time, appears the instruction pulse to push the motionless functional element the aspect. This has affected the engine bed processing precision, namely the instruction pulse and actual enters for the step does not tally,has the processing error therefore, the split-ring numerical control system all establishes generally has the reverse gap error compensatory function, with by makes up which wastes time the step reverse gap difference compensates is first actual reverse enters for the error, converts the pulse equivalent number it, compensates the subroutine as the gap the output, when the computer judgment appears when instruction for counter motion, transfers the gap to compensate the subroutine immediately, compensates the pulse after the output to eliminate the reverse gap to carry on again normally inserts makes up the movement. 2. often the value systematic characteristic position error compensates A kind of storehouse by transfers for the designer. Like this in the components design stage, the designer only must input the characteristic the parameter, the system direct production characteristic example model: We must save the related characteristic class in the database the structure information, the database table collection are use in saving this part of related information. According to the characteristic type definition need, we defined the characteristic class code table, the
PLC外文文献翻译
Programmable logic controller A programmable logic controller (PLC) or programmable controller is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines, amusement rides, or lighting fixtures. PLCs are used in many industries and machines. Unlike general-purpose computers, the PLC is designed for multiple inputs and output arrangements, extended temperature ranges, immunity to electrical noise, and resistance to vibration and impact. Programs to control machine operation are typically stored in battery-backed or non-volatile memory. A PLC is an example of a real time system since output results must be produced in response to input conditions within a bounded time, otherwise unintended operation will result. 1.History The PLC was invented in response to the needs of the American automotive manufacturing industry. Programmable logic controllers were initially adopted by the automotive industry where software revision replaced the re-wiring of hard-wired control panels when production models changed. Before the PLC, control, sequencing, and safety interlock logic for manufacturing automobiles was accomplished using hundreds or thousands of relays, cam timers, and drum sequencers and dedicated closed-loop controllers. The process for updating such facilities for the yearly model change-over was very time consuming and expensive, as electricians needed to individually rewire each and every relay. In 1968 GM Hydramatic (the automatic transmission division of General Motors) issued a request for proposal for an electronic replacement for hard-wired relay systems. The winning proposal came from Bedford Associates of Bedford, Massachusetts. The first PLC, designated the 084 because it was Bedford Associates' eighty-fourth project, was the result. Bedford Associates started a new company dedicated to developing, manufacturing, selling, and servicing this new product: Modicon, which stood for MOdular DIgital CONtroller. One of the people who worked on that project was Dick Morley, who is considered to be the "father" of the PLC. The Modicon brand was sold in 1977 to Gould Electronics, and later acquired by German Company AEG and then by French Schneider Electric, the current owner. One of the very first 084 models built is now on display at Modicon's headquarters in North Andover, Massachusetts. It was presented to Modicon by GM, when the unit was retired after nearly twenty years of uninterrupted service. Modicon used the 84
基于PLC相关的毕业设计外文翻译(可编辑修改word版)
毕业论文（设计）外文翻译 题目：可编程逻辑控制器技术 系部名称：信息工程系专业班级： 学生姓名：学号： 指导教师：教师职称： 2014 年3 月XX 日
译文 可编程逻辑控制器技术 引言 PLC（可编程逻辑控制器）实际是一个工业控制系统（近来我们看到更多的是用处理器来取代微控制器），在软件和硬件都配备的条件下，适合应用于工业环境。PLC 的发明是相当必要的，它代替了传统的依靠由继电接触器电路来控制电机。PLC 的工作原理是根据它的输入信号和工作状态来确定输出。用户通常是通过软件或编程输入一个程序，来输出所需要的结果。 如图 8-1 所示，PLC 是由典型的黑色构件组成。特别需要注意的是它的输入和输出， 因为在这些模块上，工业环境会给 CPU 一个输入线，所以很有必要将 CPU 模块隔离以保护其免遭有害的影响。程序单元通常是用计算机来编写程序（一般是梯形图）。 1.1CPU 的中央处理单元 中央处理单元（CPU）是一个 PLC 的主控制器。一般 CPU 本身是一个微控制器。通常这些都是 8 位微控制器，如 8051 ，现在的这些是 16 位和 32 位微控制器。潜规则是，你会发现用在 PLC 控制器上的微控制器多数是由日本生产的日立和富士通，欧洲的西门子控制器，和美国的摩托罗拉微控制器。CPU 也负责通讯，与 PLC 控制器的其它部分相互联系，如程序执行，内存操作，监督输入和设置输出。PLC 控制器拥有复杂的程序用于内存检查，以确保 PLC 内存不被损坏（内存检查是为了安全原因而作出的）。一般来说，CPU 单元多数用来检查 PLC 控制器本身，所以有可能出现的错误很早就会被发现。你可以简单地看任何 PLC 控制器,查看错误信号在发光二极管上的种种指示形式。 1.2内存 系统内存（今天主要是在 FLASH 技术上实现）用于一台 PLC 的过程控制系统。除了 这个操作系统它还包含用户程序将梯形图翻译成二进制的形式。 FLASH 存储器的内容仅在 用户程序改变下可以改变。PLC 控制器较早被用来代替闪存，EPROM 存储器代替了那些只能依靠紫外线灯等擦除内存并依靠程序员来编程的 FLASH 存储器。在 FLASH 技术的作用下这个过程被大大的缩短了。重组程序内存通过程序中的串行通讯用于应用程序开发。使用内存被划分成多个具有特殊功能的模块。存储器某些部分用来存储输入状态和输出状态。一个 输入信号的实际状态是用 1 或0 存储在一个特定的存储位。每一个输入信号和输出信号在内存里都有一个位与之相对应。内存的其他部分用来存储用户程序中使用的变量以及变量的内容。例如，定时器的值和计数器的值都将被存储在这部分内存里。 1.3PLC 控制器的编程 PLC 控制器可以通过计算机（常用的方式）进行编程，还可以通过手动编程器（控制台）编程。这实际上意味着如果你有需要的编程软件那么每个 PLC 控制器都可以通过计算机进行编程。今天的传输计算机是非常适合在工厂对 PLC 控制器进行编程的。这对工业有着非常重要的意义。一旦系统被刷新，重新读取正确的程序到 PLC 就很重要。还可以定期检查 PLC 中的程序是否改变了。这有助于避免在工厂车间发生危险状况（部分汽车制造商建立了通信网络，定期检查项目中的 PLC 控制器，以确保执行的程序是正确的）。
plc外文翻译
1 Bit Logic In structi ons 1.1 Overview of Bit Logic In structi ons 1.1.1 Description Bit logic in structi ons work with two digits, 1 and 0. These two digits form the base of a nu mber system called the binary system. The two digits 1 and 0 are called binary digits or bits. In the world of con tacts and coils, a 1 in dicates activated or en ergized, and a 0 in dicates not activated or not en ergized. The bit logic in struct ions in terpret sig nal states of 1 and 0 and comb ine them accord ing to Boolea n logic. These comb in ati ons produce a result of 1 or 0 that is called the “result of logic operati on ” (RLO). The logic operations that are triggered by the bit logic instructions perform a variety of fun cti ons. There are bit logic in structio ns to perform the followi ng fun cti ons: ---| |--- Normally Ope n Co ntact (Address) ---| / |--- Normally Closed Con tact (Address) ---(SAVE) Save RLO into BR Memory XOR Bit Exclusive OR ---()Output Coil ---(# )--- Midli ne Output ---|NOT|--- In vert Power Flow The followi ng in structio ns react to an RLO of 1: ---(S ) Set Coil ---(R ) Reset Coil SR Set-Reset Flip Flop RS Reset-Set Flip Flop Other in structi ons react to a positive or n egative edge tran siti on to perform the followi ng functions: ---(N)--- Negative RLO Edge Detectio n ---(P)--- Positive RLO Edge Detectio n NEG Address Negative Edge Detectio n POS Address Positive Edge Detectio n
plc外文翻译
1 Bit Logic Instructions 1.1 Overview of Bit Logic Instructions 1.1.1 Description Bit logic instructions work with two digits, 1 and 0. These two digits form the base of a number system called the binary system. The two digits 1 and 0 are called binary digits or bits. In the world of contacts and coils, a 1 indicates activated or energized, and a 0 indicates not activated or not energized. The bit logic instructions interpret signal states of 1 and 0 and combine them according to Boolean logic. These combinations produce a result of 1 or 0 that is called the “result of logic operation” (RLO). The logic operations that are triggered by the bit logic instructions perform a variety of functions. There are bit logic instructions to perform the following functions: ---| |--- Normally Open Contact (Address) ---| / |--- Normally Closed Contact (Address) ---(SAVE) Save RLO into BR Memory XOR Bit Exclusive OR ---( ) Output Coil ---( # )--- Midline Output ---|NOT|--- Invert Power Flow The following instructions react to an RLO of 1: ---( S ) Set Coil ---( R ) Reset Coil SR Set-Reset Flip Flop RS Reset-Set Flip Flop Other instructions react to a positive or negative edge transition to perform the following functions: ---(N)--- Negative RLO Edge Detection ---(P)--- Positive RLO Edge Detection NEG Address Negative Edge Detection POS Address Positive Edge Detection
PLC控制系统外文翻译
附录 Abstract: Programmable controller in the field of industrial control applications, and PLC in the application process, to ensure normal operation should be noted that a series of questions, and give some reasonable suggestions. Key words: PLC Industrial Control Interference Wiring Ground Proposal Description Over the years, programmable logic controller (hereinafter referred to as PLC) from its production to the present, to achieve a connection to the storage logical leap of logic; its function from weak to strong, to achieve a logic control to digital control of progress; its applications from small to large, simple controls to achieve a single device to qualified motion control, process control and distributed control across the various tasks. PLC today in dealing with analog, digital computing, human-machine interface and the network have been a substantial increase in the capacity to become the mainstream of the field of control of industrial control equipment, in all walks of life playing an increasingly important role. ⅡPLC application areas Currently, PLC has been widely used in domestic and foreign steel, petroleum, chemical, power, building materials, machinery manufacturing, automobile, textile, transportation, environmental and cultural entertainment and other industries, the use of mainly divided into the following categories: 1. Binary logic control Replace traditional relay circuit, logic control, sequential control, can be used to control a single device can also be used for multi-cluster control and automation lines. Such as injection molding machine, printing machine, stapler machine, lathe, grinding machines, packaging lines, plating lines and so on. 2. Industrial Process Control In the industrial production process, there are some, such as temperature, pressure, flow, level and speed, the amount of continuous change (ie, analog), PLC using the appropriate A / D and D / A converter module, and a variety of control algorithm program to handle analog, complete closed-loop control. PID closed loop control system adjustment is generally used as a conditioning method was more. Process control in metallurgy, chemical industry, heat treatment, boiler control and so forth have a very wide range of applications 3. Motion Control PLC can be used in a circular motion or linear motion control. Generally use a dedicated motion control module, for example a stepper motor or servo motor driven single-axis or multi-axis position control module, used in a variety of machinery, machine tools, robots, elevators and other occasions. 4. Data Processing PLC with mathematics (including matrix operations, functions, operation, logic operation), data transfer, data conversion, sorting, look-up table, bit manipulation functions, you can complete the data collection, analysis and processing.Data
精品中英文外文翻译--PLC和微处理器-定
Introductions of PLC and MCU A PLC is a device that was invented to replace the necessary sequential relay circuits for machine control. The PLC works by looking at its inputs and depending upon their state, turning on/off its outputs .The user enters a program, usually via software or programmer that gives the desired results. PLC are used in many “real world” applications. If there is industry present, chances are good that there is a PLC present. If you are involved in machining, packaging, material handling, automated assembly or countless other industries, you are probably already using them. If you are not, you are wasting money and time. Almost any application that needs some type of electrical control has need for PLC. For example, let’s assume that when a switch turns on we want to turn a solenoid on for 5 seconds and then turn it off regardless of how long the switch is on for. We can do this with a simple external timer. What if the process also needed to count how many times the switch individually turned on? We need a lot of external counters. As you can see, the bigger the process the more of a need we have for a PLC. We can simply program the PLC to count its inputs and turn the solenoids on for the specified time. We will take a look at what i s considered to be the “top 20” PLC instructions. It can be safely estimated that with a firm understanding of there instructions one can solve more than 80% of the applications in existence. That‘s right, more than 80%! Of course we’ll learn more than jus t these instructions to help you solve almost ALL your potential PLC applications. The PLC mainly consists of a CPU, memory areas, and appropriate circuits to receive input/output data, as shown in Fig. 19.1 We can actually consider the PLC to be a box full of hundreds or thousands of separate relays, counters, timer and date storage locations. Do these counters, timers, etc. really exist? No, they don’t “physically” exist but rather they are simulated and can be considered software counters, timers, etc. These internal relays are simulated through bit locations in registers. What does each part do? INPUT RELAYS-(contacts) These are connected to the outside world. They physically exist and receive signals from switches, sensors, etc... Typically they are not relays but rather they are transistors.
PLC中英文资料外文翻译-(1)
可编程控制器技术讨论与未来发展 摘自《可编程控制器技术讨论与未来发展》 数字媒体系 08165110 多衡随着时代的发展,当今的技术也日趋完善、竞争愈演愈烈;单靠人工的操作已不能满足于目前的制造业前景,也无法保证更高质量的要求和高新技术企业的形象. 人们在生产实践中看到,自动化给人们带来了极大的便利和产品质量上的保证,同时也减轻了人员的劳动强度,减少了人员上的编制.在许多复杂的生产过程中难以实现的目标控制、整体优化、最佳决策等,熟练的操作工、技术人员或专家、管理者却能够容易判断和操作,可以获得满意的效果.人工智能的研究目标正是利用计算机来实现、模拟这些智能行为,通过人脑与计算机协调工作,以人机结合的模式,为解决十分复杂的问题寻找最佳的途径我们在各种场合看到了继电器连接的控制，那已经是时代的过去，如今的继电器只能作为低端的基层控制模块或者简单的设备中使用到；而PLC的出现也成为了划时代的主题，通过极其稳定的硬件穿插灵活的软件控制，使得自动化走向了新的高潮。 PLC的最大特点在于：电气工程师已不再电气的硬件上花费太多的心计，只要将按钮开关或感应器的输入点连接到PLC的输入点上就能解决问题，通过输出点连接接触器或继电器来控制大功率的启动设备，而小功率的输出设备直接连接就可以。 PLC的内部包含了具有中央处理器的CPU，并带有外部I/O口扩展的I/O接口地址和存储器三大块组成，CPU的核心是由一个或者多个累加器组成，它们具有逻辑的数学运算能力，并能读取程序存储器的内容通过计算后去驱动相应的存储器和I/O接口；I/O口将内部累加器和外部的输入和输出系统连接起来，并将相关的数据存入程序存储器或者数据存储器中；存储器可以将I/O口输入的数据存入存储器中，并在工作时调转到累加器和I/O接口上，存储器分程序存储器ROM和数据存储器RAM,ROM可以将数据永久的存入存储器中，而RAM只能作为CPU计算时临时计算使用的缓冲空间。 PLC的抗干扰是极其优秀的，我们根本不用去关心它的使用寿命和工作场合的恶劣，这些所有的问题已不再成为我们失败的主题，而留给我们的是关心如何来利用PLC的内部资源为我们加强设备的控制能力，使我们的设备更加的柔性。 PLC的语言并不是我们所想象的汇编语言或C语言来进行编程，而是采用原有的继电器控制的梯形图，使得电气工程师在编写程序时很容易就理解了PLC的语言，而且很多的非电气专业人士也对PLC很快认识并深入。
PLC中英文资料外文翻译
可编程控制器 技术讨论与未来发展 学生姓名： ****** 所在院系： ****** 所学专业： ****** 导师姓名： ****** 完成时间：******
外文资料 PLCtechnique discussion and future development With the development of the times, today's technology is maturing, competition intensified。 rely on manual operation does not satisfy the current industry outlook, there is no guarantee of higher quality requirements and high-tech corporate image. People saw in the production practice, automation to bring great convenience and product quality assurance, but also reduce the labor intensity, reducing the staff on the establishment in many complex production process is difficult to achieve target control, the overall optimization, optimal decision-making, skilled operatives, technicians or specialists, managers can easily determine and operate it, you can get satisfactory results. artificial intelligence research is the use of computers to achieve the target, the analog These intelligent behavior, through coordination of the human brain and a computer to combine human models for solving very complex problem of finding the best way. PLC's most important feature is: electrical engineer electrical hardware no longer spend too much scheming, as long as the button switch or sensor input connected to the PLC input point will solve the problem by connecting the output point contacts or relay to control the power of the boot device, and small power output devices can be connected directly. Contained within the PLC having a central processor of the CPU, and with an external I / O port expansion I / O interface and the memory addresses of three major components, CPU core is formed by one or more accumulators, which have the logical math capabilities, and can read the contents of the program memory to drive through the calculation of the corresponding memory and I / O interface。 I / O port to the internal accumulator and external input and output systems together, and the relevant data stored in the program memory or data memory。 memory can be I / O port input data stored in memory and transferred to the accumulator at work, and I / O interfaces, memory sub-ROM program memory and data memory RAM, ROM data can be permanently stored in memory, CPU and RAM only as a temporary calculated using the calculation buffer space. PLC immunity is extremely good, we do not have to care about the life and work of its harsh occasions, all of these issues are no longer the subject of our failure, and left us is concerned with how to take advantage of the PLC's internal resources to
PLC中英文资料外文翻译
附录 外文资料 PLC technique discussion and future development Along with the development of the ages, the technique that is nowadays is also gradually perfect, the competition plays more more strong; the operation that list depends the artificial has already can't satisfied with the current manufacturing industry foreground, also can't 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 tremendous convenience and the product quantities for people up of assurance, also eased the personnel's 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 personnel or 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's brain and calculators, with the mode that person's machine combine, for resolve the very complicated problem to look for the best path We come in sight of the control that links after the electric appliances in various situation, that is already the that time generation past, now of after use in the mold a perhaps 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 head for the new high tide. The PLC biggest characteristics lie in: The electrical engineering teacher already no longer electric hardware up too many calculationses 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 electric appliances, but the