I. Kev qhia lus
Nyob rau hauv teb ntawm kev muaj tshuab automation, ob plcs (programmable cov kev tswj hwm kev tswj hwm) thiab i / o phaib (cov ntawv tso tawm / cov zis tsis tau). Lawv txhua tus ua yeeb yam sib luag hauv cov tshuab tsis paub txog kev siv tshuab, muaj cov haujlwm sib txawv thiab cov xwm txheej sib txawv. Cov lus no yuav nkag siab ntau ntxiv rau cov sib txawv ntawm PLCs thiab I / O phaib los ntawm ntau qhov kev xav, suav nrog cov ntsiab lus, cov haujlwm, thiab kev siv.
Ii. Cov ntsiab lus thiab ua haujlwm
Plc
A PLC yog lub tshuab hluav taws xob digital tsim rau cov chaw muaj chaw lag luam. Nws siv cov cim xeeb Programmable los khaws cov neeg siv - Cov lus qhia kev qhia rau kev ua haujlwm rau kev ua haujlwm rau kev ua haujlwm, sijhawm sijhawm, suav, thiab suav ua xam. Los ntawm cov tswv yim digital lossis analog / tso tawm, nws tswj ntau hom tshuab lossis cov txheej txheem ntau lawm. Raws li cov tub ntxhais tswj cov cuab yeej niaj hnub, PLCS muaj kev ntseeg siab, kev ruaj khov, ua rau lawv pom dav hauv ntau yam kev muaj zog siv tshuab.
Io daim npav
Io daim npav yog kev lag luam -}} Cov Qauv Cov Ntaub Ntawv, Taug Kev Nrhiav Tau Ua Ntej, thiab tswj cov txee ntse tawm, thiab siab} cov txee. Feem ntau siv los txuas cov khoom siv sab nraud rau cov microprocess, nws yooj yim cov ntaub ntawv tawm tswv yim thiab cov zis. Los ntawm cov chaw taws teeb hais, io daim npav pab tswj cov chaw taws teeb saib xyuas thiab tswj ntawm cov khoom siv sab nraud. Featuring dav voltage cov tswv yim, ntau qhov ntsuas kub tau yoog, thiab kev lag luam} daim npav IO yog haum rau muaj ntau txoj kev muaj kev lag luam ib puag ncig.
III. Cov qauv thiab muaj pes tsawg leeg
Plc
Plc txheej txheem sib txawv sib txawv, tab sis lawv cov hauv paus ntsiab lus tseem nyob ib puag ncig, txhua qhov chaw nyob ib puag ncig ntawm lub microprocessor core. Ib qho PLC feem ntau muaj qhov chaw ua haujlwm hauv nruab nrab (CPU), nco, cov lus qhia / tso tawm (I / OUTPUT MODULE, thiab kev sib txuas lus fais fab. Lub CPU ua haujlwm raws li tus tub ntxhais, tua cov neeg siv cov kev pab cuam los ua kev suav thiab tswj cov haujlwm. Nco cov khw muag khoom siv thiab cov ntaub ntawv. I / O Units Txuas sab nraud cov khoom siv thiab sensors rau cov ntaub ntawv tawm tswv yim / tso tawm. Lub Hwj Chim Hluav Taws Xob Module muab ruaj khov voltage. Kev sib txuas lus cuam tshuam nrog cov ntaub ntawv sib pauv nrog lwm cov khoom siv.
Io daim npav
Io daim npav feem ntau muaj cov tswv yim / cov zis tawm, cov hluav taws xob sib txuas, thiab tswj cov logic tsheb. Cov tswv yim / tso zis ncig txuas rau cov khoom siv sab nraud thiab sensors kom pab tau cov ntaub ntawv tau txais thiab tsim tawm; Lub interface ncig ua ke txhawb kev sib txuas lus thiab cov ntaub ntawv sib pauv nrog lub microprocessor; Thiab tswj cov logic ntsuas tswj cov xwm txheej ua haujlwm ntawm cov tswv yim / cov zis tshaj tawm. Io phaib feem ntau yog tsim qauv tsim qauv, tso cai rau kev teeb tsa yooj yim rau hauv ntau lub system tswj.
IV. Cov ntawv thov thiab cov yam ntxwv
Plc
PLCS nrhiav cov ntawv thov dav dav thoob plaws kev lag luam sib txawv suav nrog kev siv tshuab Lawv muaj kev ntseeg siab siab thiab ruaj khov, yoog ua rau ib puag ncig kev lag luam. PLCS kuj tseem xa cov peev xwm ruaj khov- xws li tswj cov kev tswj hwm, thiab suav sij hawm, thiab suav} kom tau raws li cov kev tswj hwm zoo tshaj plaws. Tsis tas li ntawd, PLCS yog tus cwj pwm los ntawm kev yooj yim ntawm kev yooj yim, txij nkawm, thiab nthuav dav, yooj yim system cov kev hloov pauv thiab hloov kho.
Io phaib
IO Photo feem txuas txuas cov khoom siv sab nraud rau cov microprocess rau kev sib txuas lus thiab cov ntaub ntawv sib pauv. Lawv tsim nyog rau cov xwm txheej xav tau cov ntaub ntawv uas tau txais thiab tswj hwm, xws li kev lag luam, cov tsev ntse, thiab saib xyuas ib puag ncig. IO daim npav muaj kev hloov pauv thiab muaj zog hauv siab, pub cov lus qhia / tso tawm cov ntsiab lus kom yooj yim ntxiv lossis txo qis raws li xav tau. Lawv kuj txhawb nqa kev saib xyuas cov chaw taws teeb thiab tswj cov haujlwm, ua kom cov chaw tswj chaw taws teeb thiab kev ua haujlwm ntawm cov khoom siv sab nraud. Txawm li cas los xij, piv rau PLCS, IO phaib feem ntau tuav tsuas yog cov ntaub ntawv tau txais thiab tswj cov haujlwm kev ua haujlwm thiab tswj cov peev txheej nyuaj.
V. Cov Ntsiab Lus
Hauv cov ntsiab lus, plcs thiab i / o phaib ua rau muaj kev sib txawv ntawm kev txhais, kev ua haujlwm, thiab kev siv. PLCS yog kev tswj cov khoom siv tshwj xeeb engineered rau cov chaw muaj kev lag luam, muaj kev ntseeg siab, kev ruaj khov, thiab cov muaj peev xwm tswj tau ruaj khov. Conversely, i / O Phaib Muaj nuj nqi raws li cov ntaub ntawv tau thiab tswj cov qauv tsim los txuas cov khoom sab nraud nrog cov microprocessors rau kev sib txuas lus thiab cov ntaub ntawv sib pauv. Cov kev siv ua haujlwm yuav tsum xaiv cov cuab yeej tsim nyog raws cov cai thiab cov xwm txheej thov kom ua tiav cov haujlwm uas xav tau.