Exp Ing PLC

8/8/2019 Exp Ing PLC

1/13

POR: Jader MoreloEfran Ponce

Yonatan Garcs Johan Arias


2/13

HISTORY OF PLCHISTORY OF PLCSSyy TheThe PLC PLC was was invented invented inin

responseresponse toto thethe needsneeds of of thethe American American automotiveautomotivemanufacturingmanufacturing industryindustry. .

yy TheThe first first ProgrammableProgrammableLogicLogic Controller Controller (PLC)(PLC) was was developed developed byby aa group groupof of engineersengineers atat General General Motors Motors inin 1968 1968, , when when thethecompanycompany were were lookinglooking for for anan alternativealternative totoreplacereplace complexcomplex relayrelaycontrol control systemssystems. .


3/13


4/13

Structure ,Functionality and Programmingof a PLC

Structure

PLC`s have The basic structure


5/13

Structure ,Functionality and Programmingof a PLC

Functionality and Programmingy The function of an input module is

to convert incoming signals intosignals, which can be processed bythe PLC, and to pass these to thecentral control unit. The reversetask is performed by an output

module. This converts the PLCsignal into signals suitable for theactuators.


6/13

Structure ,Functionality andProgramming of a PLCPro ra iny User interface: Human-Machine Interface

(HMI)y

Co nications: Modbus, BACnet orDF1, DeviceNet or Profibus.y p ro ra in lan a es for

p ro ra a le control syste s: FBD(Function block diagram), LD (Ladderdiagram), ST (Structured text, similar to the

Pascal programming language), IL(Instruction list, similar to assembly language) and SFC (Sequential functionchart). These techniques emphasize logicalorganization of operations.


7/13

A reas of application of a PLCA reas of application of a PLCy E very system or machine has a controller.

Depending on the type of technology used,controllers can be divided into pneumatic,

hydraulic, electrical and electroniccontrollers. Frequently, a combination of different technologies is used.

y

Typical applications for such controllers canbe found in automatic washing machines, video cameras, and cars.


8/13

ADVAN TAGE SADVAN TAGE S

S impleS imple programming programmingProgramProgram changeschanges without without systemsystem

interventionintervention(no(no internal internal rewiringrewiring) )TheThe controller controller isis S maller S maller and and lowlow costcost

maintenancemaintenance

DIS A DV ANTAGESDIS A DV ANTAGES

TheThe controller controller isis expensiveexpensive and and moremore reliablereliablethanthan correspondingcorresponding relayrelay control control systemssystems. .


9/13

improvementin the PLC


10/13

y Businesses today, who

think in the future, areequipped with modernelectronic devices in

your machine andprocess control. Today automated factoriesshould include in theirsystems, high efficiency and flexibility.


11/13

y PLC programming isdone through voice,ordering the desiredactions and store themin his memory to repeatprogressively


12/13

y the dashboard just use acable that connectsdirectly to the machine

without using moresupplements


13/13

y operate of eachmachine that has a PLCin the factory, operated

via a satellite from anoffice

Exp Ing PLC

Documents

Transcript of Exp Ing PLC