8/3/2019 229-Feedback 34 150-Feedback 34 150 Elevator

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Elevator 34-150

Description

The elevator provides a sophisticated application toillustrate the principles of PLC interfacing and controlbased on a real life application. Starting with simpleprogramme sequences to control elevator speed,direction and floor arrival/departure, the student canprogress to advanced floor request handling and

continuous (analogue) control with accelerationprofiling and compensation for varying car loads.

The elevator car moves between floors in responseto requests from call buttons at each floor and ‘within’the elevator car (located on an external panel).Sensors indicate which floor the elevator car is at andprovide advance warning to allow the car to be slowedprior to arriving at the destination floor. A brake allowsthe car to be held at a floor while the motorised cardoor is operated to allow occupants to enter or leaveand a sounder is provided to announce arrival.

The internal controller unit provides closed-loop motorspeed control with both logic and analogue interfacesso the elevator can be controlled by a basic PLC with

minimal digital I/O. More sophisticated control may beimplemented using an additional analogue I/O.

An integral load-cell and motor position feedback canextend the application to continuous control. The load-cell indicates elevator car loading and a set of weightssimulate varying numbers of car occupants. Theposition feedback signal allows advanced control ofthe elevator car motion.

Features

!!!!! Fully working model of an elevator withfour floors

!!!!! Floor sensing and visual indication ofdirection of travel

!!!!! Motorised elevator car door

!!!!! ‘Normally on’ brake to hold car at desired floor

!!!!! Up/down call buttons on each floor

!!!!! Front panel manual switch for testing anddebugging

!!!!! Integral motor servo controller with

mechanical brake!!!!! Interfaces with most PLC types. Analogue

control is also available

!!!!! Switchable faults

Layout of drive motor and pulley with the perspex cover removed 

Photo illustrating the scale of the Elevator 

8/3/2019 229-Feedback 34 150-Feedback 34 150 Elevator

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Park Rd, Crowborough, East Sussex,

TN6 2QR, England.Tel: +44 (0) 1892 653322

Fax: +44 (0) 1892 663719

E-mail: feedback@fdbk.co.uk

Website: www.fbk.com

For further information on Feedback equipment please contact: . . . . . . . .

Elevator 34-150 Printed in England by FI Ltd, Crowborough 0207  

Feedback reserves the right to change these specifications without notice. Registered in England number 990620. A subsidiary of Feedback plc.

Specification

Four floors

Elevator car driven by belt with counterbalance.

‘Normally on’ mechanical brake to hold car at desired floor.

Winder motor driven by fully protected power amplifier (eg.if elevator car jams or car is driven with the brake applied).

Built-in closed loop speed control.

Elevator car with motorised door, internal illumination and

sounder to announce arrival.Visual indication of position of elevator car and directionof travel.

Up/down call buttons on each floor.

Floor request buttons ‘inside’ elevator car (located onexternal panel).

Discrete motor interface for PLC logic-only control: up/ down, 100% speed, 60% and 30% speed.

Time to travel from ground to top floor at 100% speed:~ 7 secs.

Vertical travel limit switches.

Manual drive switch on front panel to aid testing anddebugging.

Load-cell to indicate passenger loading in elevator car.Selection of weights to simulate varying passenger loads

Analogue car position feedback signal.

Fault simulation selected via rear panel DIP switches.

Example code provided for Allen Bradley and MitsubishiPLCs.

Electrical interface: logic I/O will operate from 3V to 24V(using external pull-up voltage), analogue I/O operatesfrom 0 -10V or ±10V.

Multiple units may be mounted side-by-side to formcomplex multi-elevator systems.

Curriculum Coverage

Fundamentals of logicBasics of PLC programming

Developing ladder logic programmes

Basic and advanced sequence control

Services Required

Power Supply

Universal input range: 110V - 230V ac, 50 - 60HzPower: 50VA

PLC Requirements

Minimum PLC I/O requirement:16 digital inputs, 16 digital outputs

For basic analogue control:1 analogue input, 1 analogue output

For advanced analogue control:3 analogue inputs, 1 analogue output

Tender Specification[1] A working model of an elevator with 4 floors[2] To illustrate the principles of PLC interfacing and

control[3] Elevator car to have motorised door, internal

illumination and sounder to announce arrival[4] Analogue closed-loop control can be implemented[5] To be supplied with an experimental manual[6] To be supplied by a supplier offering a 1 year parts

and labour warranty

Dimensions and WeightHeight: 1,070mm, Width: 340mm, Depth: 300mm,

Weight: 14 kg

Ordering InformationElevator 34-150

Digital inputs: Open/close car doorBrake releaseCar going up indicatorCar going down indicatorCar ‘on its way’ floor 4 downCar ‘on its way’ floor 3 downCar ‘on its way’ floor 3 upCar ‘on its way’ floor 2 downCar ‘on its way’ floor 2 upCar ‘on its way’ floor 1 upDestination floor 4 (car indicator)Destination floor 3 (car indicator)Destination floor 2 (car indicator)Destination floor 1 (car indicator)Car 100% speed

Car 60% speedCar 30% speedCar direction up/downArrival bell

Analogue inputs: Car speed demandMotor current demand

List of I/O

Digital outputs: Floor 1 up call button

Floor 2 up call button

Floor 2 down call button

Floor 3 up call button

Floor 3 down call button

Floor 4 down call button

Car floor 1 call button

Car floor 2 call button

Car floor 3 call button

Car floor 4 call button

Floor 1 sensor

Floor 2 sensor

Floor 3 sensor

Floor 4 sensor

Car door open

Car door closed

Analogue outputs: Car speed

Car position

Car passenger load

Units may be mounted side-by- side to form complex multi- elevator systems