Training Presentation(2003)

7/31/2019 Training Presentation(2003)

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PRESENTATION

ON

PROGRAMMBLE LOGICAL DEVICE (PLC)AT

AUTOMATION SYSTEMHO: 90-C, Shakti Enclave, Dugri Road, Ludhiana.Phone: 0161 6547953,54 Fax: 4647954Website: http://automationsystems.org

Email: [email protected],Branch Office : Pathankot/Faridabad


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M/s Automation Systems is permoted underthe brand name of schneider electric, withits Head Office in Ludhiana Incorporated in

the year 1995 with aim to establish aprofessionally managed corporate in the keyareas of :

Company provide solution for:-

turnkeys project Home automation

Industry automation

Automation Systems has been devoted to thedevelopment of innovative solutions for over

12 years.


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To analyze and control all the process,parameters in the plant by the help of

automation devices.

Automation device is a

system, which on the basis ofinformation fed in it, performspredefined actions with a bearing on itsenvironment.


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To save energy with high accuracy

Bulk production with less cost

High speed of operation Simplification of the circuits

Easy faultfinding and troubleshooting

Lesser down timing of process / control


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PLC CONTROL ( BY LADDER DIAGRAM)

CNC CONTROL ( BY LADDER DIAGRAM)

MICROCONTROLLERS (BY ASSEMBLY ORIN C)

MICROPROCESSORS (BY ASSEMBLY OR

IN C) SPLD/CPLD/FPGA (BY VHDL)

AND MANY MORE . . . . . . . . .


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In 1968 GM Hydramatic issued arequest for proposal for an electronic

replacement for hard wired relaysystems. PLC were first created to servethe automobile industry, and the firstPLC project was developed in 1968 forgeneral motors to replace hard wiredrelay systems.


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PLC (Programmable LogicController) is a solid state device

designed to perform the logicfunctions previously accomplishedby components such aselectromechanical relays, drum

switches, mechanical timers/counters etc. for the control andoperation of manufacturing process

equipment and machinery.


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Let's assume that when a switch turns on we want toturn a solenoid on for 5 seconds and then turn it offregardless of how long the switch is on for. We can dothis with a simple external timer. But what if the

process included 10 switches and solenoids? We wouldneed 10 external timers. What if the process alsoneeded to count how many times the switchesindividually turned on? We need a lot of externalcounters.

As you can see the bigger the process the more of aneed we have for a PLC. We can simply program thePLC to count its inputs and turn the solenoids on forthe specified time.


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COMMUNICATION

MODULE

MEMORYPROCESSO

RPOWER

I/OINTERFACE

BUS

SENSORACTUATO

COMPUTER


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S.NO. INSTRUCTIONLIST

DISCRIPTION SYMBOL

1 LD BEGIN THE LOGIC OPERATIONWITH NORMALLY OPENCONTACT

2 LDN BEGIN THE LOGIC OPERATIONWITH NORMALLY CLOSEDCONTACT

3 AND ADDS THE NORMALLY OPENCONTACT SERIALLY

4 ANDN ADDS NORMALY CLOSEDCONTACT SERIALLY

5 OR OR THE NORMALLY OPEN

CONTACT IN PARALLEL WAY

6 ORN OR THE NORMALLY CLOSEDCONTACT IN PARALLEL WAY

7 OUT OUTPUT

8 SETLATCH

S9 RESET UNLATCH R


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S.NO. SWITCH TYPE DISCRIPTION SYMBOL

1 Toggle switchToggle switches are actuated by a leverangled in one of two or more positions

2 Pushbuttonswitch

A switch that is open when unactuated iscalled normally-open. A switch that is closedwhen unactuated is called normally-closed

3 Selector switch Selector switches are actuated with a rotaryknob or lever of some sort to select one of

two or more positions.

4 Limit switch motion-operated switches are commonlycalled limit switches

5 Proximityswitch

Proximity switches sense the approach of ametallic machine part either by a magneticor high-frequency electromagnetic field

6 Pressure switchGas or liquid pressure can be used toactuate a switch mechanism if that pressureis applied to a piston, diaphragm, or bellows,which converts ressure to mechanical


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Timers function to delay, prolong andcontrol actions over a predetermined

period.TYPES OF TIMER

ON DELAY:- On delay timer is used to on

the device after the define time period OFF DELAY: Off delay timer is used to

OFF the device after the define timeperiod


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T1

I1 Q

1

Q1

Q1

Q2

12345

T1


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This function is used to compare thecurrent counting values of two counters orof a counter and a constant value. Thecomparison operators are =, >, , , and Cy + y

Cx and Cy: Represent the counters to

compare.


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AC drive, is able to supply the requiredlevel of current and voltage in a form

that motor required. The controls isprovide to the user with necessaryadjustments such as minimum and

maximum speed settings, so thatthe drive can be adapted to theuser's process. The drive can shutitself down when detecting either an

internal or an external problem. The


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RECTIFIER COMPAR

ATORFILTER

3PHASE.C. SUPPLY

MOTOR


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A small PLC will have a fixed number ofconnections PLCs may need to interactwith people for the purpose ofconfiguration, alarm reporting oreveryday control.

A Human-Machine Interface (HMI) isemployed for this purpose. HMIs are alsoreferred to as MMIs (Man MachineInterface) and GUI (Graphical User

Interface). A simple system may use buttons and

lights to interact with the user. Textdisplays are available as well as graphicaltouch screens. More complex systems usea programming and monitoring software


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To work with a system, users have to beable to control the system and assess thestate of the system. For example, when

driving an automobile, the driver uses thesteering wheel to control the direction ofthe vehicle, and the accelerator pedal,brake pedal and gear stick to control the

speed of the vehicle. The driver perceivesthe position of the vehicle by lookingthrough the windscreen and exact speedof the vehicle by reading the

speedometer. The user interface of theautomobile is on the whole com osed of


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PLC AC DRIVE

PHOTO DOIDELED

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MOTOR


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Training Presentation(2003)

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