Intelligent elevator control by ordinal structure fuzzy logic. Requirements for elevator controls and indicators are governed by local accessibility codes. Elevator design, construction and maintenance 1905. And apply technology of programmable logic controller to control system for five floor elevator. This makes it easier to control the elevator, as it compensates for the differing weight of cable between the hoist and the cab. The control circuit necessary for the operation of an automatic elevator which starts and stops at specified places and at specified time is presented. The elevator works by a threephase power circuit which supplies the motor and a low voltage control circuit which supplies the relay coils. The design of elevator control system based on plc and. It contributes to the design and use of simple circuit, easy to understand, operate and use. Design of control circuit of an automated elevator. Elevator design, construction and maintenance 1905 merchant books on. Here it has been tried to dispense with relays and their contacts, limit switches etc.
Jun 18, 2015 the advent of personal computers has made microprocessor technology affordable for many other fields. Four layer elevator control using programmable logic controller. Answer to the block diagram for an elevator controller for a twofloor elevator. Development of lift control system algorithm and pme. Controlling water level in the plc ladder logic program duration. The elevator controller is a device used to control a lift motion and to indicate the direction of motion, and the present floor level, etc. This is a list of elevator or escalator controllers. Elevator control using plc s7300 and wincc flexible. Design a elevator system system designing interviews. To enhance its operating performance, a plcbased control system is designed for gisgasinsulated switchgear according to its contractual features and control requirements.
They are very dependable, compact, and simple to troubleshoot. Upon receiving this data, the elevator control board will respond in two different manners depending on the. Elevator control system of a building has been proposed in some literatures 123. This design introduced the operation process of the lift.
Free logic design books download ebooks online textbooks. This technology not only improves the elevator reliability, maintainability, and flexibility while greatly extending the life of the elevator, shortens the development cycle of the elevator. This paper introduced the design and realization of the elevator experimental equipment based on configuration software and plc. In accordance with the requirements of energy conservation design teaching building mingde building. The block diagram for an elevator controller for a two. Practical information required for group control is stored in the systems memory as a knowledge database. Main thing to worry about is how would you notify the elevator that it needs to move up or down. Elevator control not, and, and or logic a design a program that control the elevator in figure 1 and it is automatically stop the motor when the elevator is either fully raised or lowered. The above explained elevator control using plc is for example only. Nov 12, 2014 in this book, i therefore wanted to give focus on using programmable logic controller to control the elevator, as plcs make the easy operation to control complex circuit. This is to certify that the project entitled plc based elevator controller submitted in partial fulfillment of the requirement for the award of bachelor of technology in electrical engineering under wbut is faithful record of the bona fide project work, carried out by the following candidates under my guidance and supervision. Elevators with more than 30 m 98 ft of travel have a system called compensation. Even though the design was limited to four levels, some suggestions are given later as to how to extend the elevator system to more than four levels.
What is the algorithm or logic behind how elevators work. The research paper emphasizes on the elevator control system which is one of the important aspects in infrastructure industry. At present the elevator operations are generally controlled by electromechanical relays with a large number of contacts and limit switches. Design of control circuit of an automated elevator employing mathematical logic. A simulation study of an elevator control system using digital logic md. More number of connections of relay logic are found in traditional elevator system.
This is a separate set of cables or a chain attached to the bottom of the counterweight and the bottom of the elevator cab. Jun 04, 2017 control logic is the part of the machine that creates a sequence of operations for the arithmetic and memory components of the machine. The person, in turn, has the ability to tell the elevator to move up, move down, or openclose the door. Elevator is an inseparable part of a building structure. The otis elevator dates from the middle of the 19th century, but ordinary elevators date back much furtheras far as greek and roman times. Gary is the author of introduction to programmable logic controllers, editions 1 through 4 and the lab manual to accompany each edition of introduction to programmable logic controllers. Ai2200c group control systems the systems, which employ an intelligent expert system and fuzzy logic, are specially designed for group control of 3 to 8 elevators as described above. Jan 03, 2016 the aim of the project is to design and implement an elevator lift controller using verilog hardware descriptive language hdl. Digital logic design is foundational to the fields of electrical engineering and computer engineering. It is so, because control logic becomes more centralized in the source code. In the design procedure of the elevator control circuit, the controller datapath approach was used. His latest book is the introduction to the controllogix programmable automation controller using rslogix 5000 with labs. A simulation study of elevator control of a 3storey building has been presented in this paper using digital logic circuit.
Prerequisite knowledge includes circuit analysis and design, analog and digital electronics, microprocessor. When a visitor calls a resident via the telephone entry system and the resident grants the visitor access, data is sent from the telephone entry system to the 2348010 elevator control board. In this approach, all the functional and memory are concentrated in the. Another advantage of this approach is that the code becomes isomorphic to the transition graph, by which it was constructed. Software design for an elevator system as most of the developers worked on some modules through out their career, its hard for them to understand and implement a. Refer to the accessibility codes in your local jurisdiction. Controller, elevator, ladder, logic, programmable, scada.
Design a plc program to execute elevator system in a 2 floor apartment using allen bradley plc programming. The five floor elevator control system design based on s7. Part of the advances in intelligent and soft computing book series ainsc, volume. Read about programmable logic controllers plc ladder logic in our free electronics textbook. It maps the current machine state into the next machine state.
It links the use of logic gates to a simple service people utilize every day, and allows trainees to change the logic and the. Check our section of free e books and guides on logic design now. Fundamentals of logic design 7th edition 1285633022 9781285633022. Design a plc program to execute elevator system in a 2 floor apartment using allen. Elevator concepts utilizes a special type of industrial computer called a programmable logic controller plc to control the logic of more complex jobs. Sep 20, 2016 basic logic is lift near to call should serve, plus there are many added logic of saftey, actual capacity. Simple logic elevator nyu tandon school of engineering.
Latching rung to operate the system through master start and stop pb. Using configuration software in conjunction with the manipulators movement in the system gave the most intuitive exhibition and the dynamic imitation. In this plc design of iopin obtain as x0x7 are 8input pins and y0y5 are output pins. The demands for the elevator can be summarized using the following logic variables. This elevator control system is designed with the help of hydraulic motor and programmable logic control plc while internal controlling is done through human machine interference hmi. Dec 06, 2015 this lesson simulates logic gates in a simple and practical way.
It allows to consider only transition graphs in order to understand the program logic or. A simulation study of an elevator control system using. Pdf control system for experimental model of electric elevator. The information in this article is taken from the us department of justices ada standards for accessible design. Elevator control system is the system responsible for coordinating all aspects of elevator service such as travel, speed, and accelerating, decelerating, door opening speed and delay, leveling and hall lantern signals. This page contains list of freely available e books, online textbooks and tutorials in logic design. Although traditional perphase equivalent circuit has been widely used in steadystate analysis and design of induction motors, it is not appropriate. Design of control circuit of an automated elevator employing mathematical logic abstract. Fault detection control logic in an aircraft elevator control system example develop logic for a launch abort system 12.
It is the most popular elevator design, in this system the car. Before the advent of solidstate logic circuits, logical control systems were designed and built exclusively around electromechanical relays. Starting the operation using start latch, ground floor pb is pushed to turn on latch coil to store the output of status when ground limit switch is off. But, one unique aspect of this work is that we have not included. The design and simulation of a fourcars elevator controller in a nine storey building is described in this paper. These characteristics may involve power, current, logical function, protocol and user input. Preliminarily, traditional elevator control systems work on the relay logic. Sutagundar, design of a plc based elevator control sy stem, international j ournal on emer ging techn ologies special issue on ncriet 2015 62. From the logic of design to startup, operation and maintenance, this reference covers all aspects of wiring, relay logic, programmable logic controllers, and a host of electrical control applications and challenges youll encounter on the job. The five floor elevator control system design based on s7300. If youre new or have created an account in the past few months, you may have to create a new one. Scada system tutorial on design of five floors elevator. Elevator plc ladder logic programming instrumentationtools.
A simulation study of elevator control of a building using. Digital logic designers build complex electronic components that use both electrical and computational characteristics. Design and implementation of hydraulic motor based elevator. Design of control circuit of an automated elevator employing. Different co have different logic stored in mother board. When designing lifts with plc, the dispatching algorithm is one of the most.
Overview proposal specifications features design process computer code circuit diagram autocad. The design and simulation were accomplished using matlabtm fuzzy logic toolbox. We are your one stop shop for all things elevator related. This paper describes the situation of chinas elevator industry. The illustration below shows the three items required in an elevator lobby.
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