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TPC 291 DIGITAL LOGIC FUNDAMENTALS QUESTIONS WITH COMPLETE SOLUTIONS
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TPC 291 DIGITAL LOGIC FUNDAMENTALS QUESTIONS WITH COMPLETE SOLUTIONS
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INTRO TO PLC TEST 1 QUESTIONSWITH COMPLETE SOLUTIONS
programmablezlogiczcontrollerz-zans--
✔✔plc,zhaszeliminatedzmuchzofzthezhardwiringzassociatedzwithzconventionalzrelayzcontrolz
circuits
howziszazplczazreal-timezsystemz-zans--
✔✔becausezthezoutputzofzthezsystemzcontrolledzbyzthezplczdependszonzthezinputzconditio
ns
howziszazplczunlikezazpersonalzcomputerz-zans--
✔✔becausezitzhaszbeenzdesignedztozoperatezinzthezindustrialzenvironmentzandziszequippe
dzwithzspecialzinput/outputzinterfaceszandzcontrolzlogic
relayzlogicz-zans--
✔✔replacedzbyzplczbutzitszeverzincreasingzrangezofzfunctionszmeanszthatzitziszfoundzinzma
nyzandzmorezcomplexzapplications
whatzarezplcszcapablezofz-zans--
✔✔relayzswitchingztaskszbutzalsozotherzapplicationszsuchzasztiming,zcounting,zcalculating,
zandzthezprocessingzofzanalogzsignals
otherzbenefitszofzplcz-zans--
✔✔incresedzreliability,zmorezflexibility,zlowerzcost,zcommunicationszcapability,zfasterzresp
onseztime,zeasierztoztroubleshoot,zeasierztoztestzfieldzdevices
openzarchitecturez-zans--
✔✔allowszsystemztozbezconnectedzeasilyztozdeviceszandzprogramszmadezbyzotherzmanuf
acturers,zusezoffzthezshelfzcomponentszthatzconformzwithzapprovedzstandards
closedzarchitecturez-zans--
✔✔onezwhosezdesignziszproprietaryzmakingzitzmorezdifficultztozconnectztozotherzsystems
plczprogramsz-zans--✔✔cannotzbezinterchangedzamongzdifferentzmanufacturers
, fixedzi/oz-zans--
✔✔typicalzofzsmallzplcszthatzcomezinzonezpackagezwithznozseparatezremovablezunits
modularzi/oz-zans--
✔✔dividedzbyzcompartmentszintozwhichzseparatezmoduleszcanzbezplugged
powerzsupplyz-zans--
✔✔supplieszdczpowerztozotherzmoduleszthatzplugzintozthezrackzforzlargezsystemszthiszpow
erzsupplyzdoesznotznormallyzsupplyzpowerztozthezfieldzdevices
processorz-zans--
✔✔(cpu)ziszthezbrainzofzthezplcztypicallyzconsistszofzazmicroprocessorzforzimplementingzth
ezlogiczandzcontrollingzthezcomminicationszamongzthezmodlues,zrequireszmemoryzforzstori
ngzuserzprogramzinstructionns,znumericalzvalues,zandzi/ozdeviceszstatus
whatzisztheztypicalzplczscanzcyclez-zans--
✔✔readzinputs,zexecutezprogram,zupdatezoutputs,zdiagnosticszandzcommunication
outputzdevicesz-zans--
✔✔smallzmotors,zmotorzstarters,zsoleniodzvalves,zindicatorzlights,zarezhardwiredztozthezou
tputzterminals
opticalzisolatorz-zans--✔✔commonlyzused,zuseszlightztozcouplezthezcircuitsztogether
fieldzandzrealzworldz-zans--
✔✔usedztozdistinguishzactualzexternalzdeviceszthatzexistzandzmustzbezphysicallyzwiredzfro
mzthezinternalzuserzprogramzthatzduplicateszthezfunctionzofzrelaysztimerszandzcounters
programmingzdevicez-zans--
✔✔usedztozenterzthezdesiredzprogramzintozthezmemoryzofzthezprocessor,zhandheldzprogr
ammingzdeviceszarezsometimeszusedztozprogramzsmallzplcs,zoncezpluggedziztheyzcanzbez
usedztozenterzandzmonitorzprograms.zitzthezprogrammingzunitzisznotzinzusezitzmayzbezunplu
ggedzandzremoved,zremovingzthezprogammingzunitzwillznotzaffectzthezoperationzofzthezuse
rzprogram
personalzcomputerz(pc)z-zans--✔✔mostzcommonlyzusedzprogrammingzdevice
programz-zans--
✔✔userzdevelopedzserieszofzinstructionszthatzdirectszthezplcztozexecutezactions
relayzladderzlogicz(rll)z-zans--
✔✔standardzprogrammingzlanguagezused.zgraphicallyzreprestentszrungszofzcontacts,zcoil
s,zandzspecialzinstructionzblocks
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