Lub khoos phis tawj muaj zog yog lub khoos phis tawj muaj zog thiab txhim kho kev lag luam. Kev siv lub tshuab computer hauv kev lag luam muaj xws li kev nrhiav tau cov ntaub ntawv, tsom xam, khaws cia, saib xyuas, thiab tswj. Lub tshuab computer muaj cov yam ntxwv tseem ceeb hauv computer thiab cov yam ntxwv. Nws lub ntsiab Cheebtsam yog industrial chassis, passive backplane thiab ntau yam boards uas yuav muab tso rau hauv nws, xws li CPU card, I/O card, thiab lwm yam., thiab muaj ib tug operating system, tswj networks thiab raws tu qauv. Ntau ruaj khov dua li cov khoos phis tawj zoo tib yam, cov khoos phis tawj muaj kev ruaj ntseg hauv cov plua plav, pa taws, kub / qis, av noo, vibration, electromagnetic, thiab corrosive ib puag ncig, nrog rau kev kuaj mob sai thiab tswj tau, thiab lawv cov sijhawm ua haujlwm yog 24-teev kev ua haujlwm tsis cuam tshuam.
Lub sijhawm tiag tiag, lub khoos phis tawj muaj peev xwm ua tiav lub sijhawm tshawb pom online thiab tswj cov txheej txheem tsim khoom lag luam, teb sai sai rau cov kev hloov pauv hauv kev ua haujlwm, thiab ua kom tau txais thiab tso tawm hloov kho raws sijhawm (cov haujlwm saib xyuas tsis muaj nyob hauv PCs), tus kheej -reset nyob rau hauv kev nyuaj siab, xyuas kom meej lub cev ua hauj lwm.
Kev nthuav dav, vim tias lub khoos phis tawj kev lag luam tau txais lub hauv paus nrog rau CPU daim npav qauv, nws muaj lub zog tawm tswv yim thiab cov khoom tso tawm, thiab tuaj yeem nthuav dav mus txog 20 lub rooj tsavxwm, uas tuaj yeem txuas nrog ntau yam khoom siv thiab cov laug cam hauv kev lag luam, xws li nrog txoj kev. controller, video saib Systems, tsheb detectors, thiab lwm yam yog txuas nrog ua kom tiav ntau yam dej num.
Kev sib raug zoo, tuaj yeem siv ISA thiab PCI thiab PICMG tib lub sijhawm, thiab txhawb nqa ntau yam kev khiav haujlwm, kev sib dhos ntau hom lus, ntau lub luag haujlwm ua haujlwm.
PLC yog cov khoom siv hluav taws xob digital, programmable maub los. Nws siv lub cim xeeb programmable los khaws cov lus qhia, tuaj yeem ua tiav cov haujlwm xws li logic, sib lawv liag, sijhawm, suav thiab lej lej, thiab tswj ntau yam kev siv tshuab lossis cov txheej txheem tsim los ntawm digital lossis zoo sib xws input / output modules, xws li analog quantities. Cov tswv yim thiab tso zis, servo tswj, tswj lub computer kev sib txuas lus, thiab lwm yam.
Txoj kev loj hlob ntawm programmable logic controllers: PLCs me me tab tom txhim kho nyob rau hauv cov kev taw qhia ntawm me me, txhim khu kev qha zog, thiab ceev ceev, kom lawv muaj peev xwm ntau lug hloov relay tswj. PLCs loj thiab nruab nrab yog tsim nyob rau hauv cov kev taw qhia ntawm lub peev xwm loj, muaj kev ntseeg siab, kev kub ceev, ntau lub luag haujlwm, thiab kev sib txuas lus, ua rau lawv ua tiav kev tswj hwm tsis siv neeg loj thiab cov tshuab ua haujlwm.
Nta: kev ntseeg siab, muaj peev xwm tiv thaiv kev cuam tshuam, yooj yim programming, yooj yim siv, yooj yim tsim thiab installation, tsawg txij nkawm ua hauj lwm, ua tiav zog, muaj zog versatility, me me, thiab tsawg zog noj.
Ib tug ib-chip microcomputer yog ib tug integrated Circuit Court nti, uas yog lub ntsiab tivthaiv ntawm ib tug embedded tswj system. Nws yog lub hauv paus processor CPU uas siv VLSI thev naus laus zis thiab muaj peev xwm ua cov ntaub ntawv; random nkag tau lub cim xeeb RAM, nyeem-tsuas nco ROM, ntau yam I / O chaw nres nkoj thiab Sino-Singapore system timer / counter thiab lwm yam haujlwm (tej zaum kuj muaj xws li cov duab tsav, mem tes dav modulation circuit, analog multiplexer, A / D converter thiab lwm yam circuits ) tau muab tso rau hauv ib qho me me tab sis zoo meej silicon nti. Lub microcomputer system yog dav siv nyob rau hauv kev lag luam tswj. Los ntawm xyoo 1980, nws tau tsim los ntawm 4-ntsis thiab 8-ntsis ib-chip microcomputer thaum lub sijhawm ntawd mus rau tam sim no 300M high-speed single-chip microcomputer.
Nta: Qhov luaj li cas ntawm ib-chip microcomputer yog qhov me me, thiab cov nti sab hauv yog siv los ua lub khoos phis tawj. Nws cov qauv yog qhov yooj yim, tab sis nws cov haujlwm ua tiav. Nws yog qhov yooj yim heev rau siv thiab tuaj yeem hloov kho thiab siv tau. Feem ntau, cov lus sib dhos lossis C yog siv rau kev ua haujlwm, uas muaj kev sib koom ua ke siab thiab muaj kev ntseeg siab. Txawm hais tias ib-chip microcomputer ua haujlwm ntev, yuav tsis muaj teeb meem ntawm kev ua tsis tiav. Nws yog siv nyob rau hauv ntau yam nplhaib kab lis kev cai, thiab nws muaj zog tswj muaj peev xwm.
Cov saum toj no yog cov lus piav qhia luv luv ntawm kev lag luam khoos phis tawj, PLC, thiab ib leeg-chip microcomputer. Lub khoos phis tawj muaj tshuab yog lub khoos phis tawj tswj kev lag luam, PLC yog lub programmable maub los, thiab ib leeg-chip microcomputer yog lub ntsiab lus tseem ceeb ntawm kev tswj hwm qhov system. Lub hauv paus ntawm lub kaw lus, lub tshuab tswj feem ntau yog lub hauv paus tswj tus tswv siv los tswj kev ua haujlwm ntawm ntau lub modules hauv kev tsim khoom.