I. Kev Taw Qhia
Programmable Logic Controllers (PLCs) yog cov cuab yeej tseem ceeb hauv kev lag luam automation, nrog rau lawv cov keeb kwm kev loj hlob rov qab mus rau xyoo 1960. Los ntawm ntau xyoo ntawm kev hloov pauv tas mus li thiab kev tsim kho tshiab, PLCs tau nce qib los ntawm cov tswj yooj yim mus rau cov cuab yeej ntse hauv kev lag luam niaj hnub automation. Daim ntawv no yuav muab cov ncauj lus kom ntxaws txog PLC txoj kev loj hlob, suav nrog nws keeb kwm, theem kev loj hlob, thiab cov theem niaj hnub no, thaum tseem tshawb nrhiav nws cov ntawv thov hauv kev lag luam automation thiab cov tiam tom ntej.
II. Keeb kwm ntawm PLC
Lub hauv paus chiv keeb ntawm PLC tuaj yeem taug qab mus rau Asmeskas kev lag luam tsheb tsim khoom hauv xyoo 1960. Nyob rau lub sijhawm ntawd, cov neeg tsim tsheb tau ntsib cov teeb meem kev tswj hwm ntawm lawv cov kab ntau lawm thiab nrhiav kev hloov pauv tau yooj yim dua, kev tswj hwm kev tswj hwm los hloov ib txwm relay-raws li kev tswj. Yog li ntawd, ib lub tuam txhab Asmeskas tau tshaj tawm thawj qhov kev lag luam PLC hauv xyoo 1968, kos npe rau hnub yug ntawm PLC thev naus laus zis.
Thaum Ntxov PLCs feem ntau hloov cov kev tswj hwm ib txwm muaj, daws cov teeb meem xws li teeb meem hauv kev hloov kho relay systems, loj loj, suab nrov, tsis yooj yim txij nkawm, thiab kev cia siab tsis zoo. Nyob rau tib lub sijhawm, PLC programming tau txais qhov kev nkag siab zoo ntawm tus ntaiv daim duab qhia kev, ua rau cov neeg siv cov kev pab cuam thiab kev debug tshuab tau zoo dua.
III. Kev txhim kho theem ntawm PLCs
Xyoo 1970s txog xyoo 1980s: Kev Txhim Kho Pib ntawm PLCs
Hauv xyoo tom qab nws pib, PLCs maj mam tau txais kev lees paub thiab kev saws hauv kev lag luam. Xyoo 1971, ib lub tuam txhab German tau tshaj tawm thawj lub programmable maub los, ntxiv rau kev txhim kho PLC. Nrog kev nce qib thev naus laus zis tsis tu ncua, PLC kev ua haujlwm tau nthuav dav, nthuav tawm cov peev txheej ua tau zoo thiab nce cov ntsiab lus tawm tswv yim / tawm (I / O). Thoob plaws xyoo 1980s, kev lag luam xav tau rau PLCs tau nce tsis tu ncua, ua rau muaj kev saws me nyuam thoob plaws ntau yam kev lag luam suav nrog kev tsim khoom, kev tsim tshuaj, thiab kev tsim hluav taws xob. Raws li qhov tshwm sim, tus naj npawb ntawm PLC cov tuam txhab tau nce siab, ua kom muaj kev sib tw ua lag luam ntxiv vim cov tuam txhab sib txawv tau qhia PLC cov khoom lag luam nrog ntau hom kev ua haujlwm thiab cov lus qhia tshwj xeeb.
Thaum lub sijhawm no, PLC daim ntawv thov tau nthuav dav dhau ntawm kev lag luam tsheb mus rau lwm qhov kev lag luam. PLC thev naus laus zis kuj tseem tau ua kom zoo dua qub, muaj cov ntsiab lus I / O ntxiv, txhim kho kev ua haujlwm nrawm, thiab ntxiv peev xwm sib txuas lus. Cov kev txhim kho no tau ua rau PLCs kom tau raws li qhov xav tau ntawm kev lag luam automation.
1990s txog tam sim no: Rapid PLC Advancement
Tsav los ntawm kev nce qib sai hauv kev siv tshuab computer, PLC kev ua haujlwm thiab kev ua haujlwm tau pom kev txhim kho tseem ceeb. Los ntawm xyoo 1990, PLCs tau nruab nrog cov txheej txheem muaj zog ntau dua thiab muaj peev xwm khaws cia ntau dua, ua rau lawv ua haujlwm tswj cov haujlwm nyuaj. Ib yam li ntawd, PLCs pib sib txuas nrog lwm cov khoom siv automation, ua tiav kev tswj hwm thiab saib xyuas muaj peev xwm. Tsis tas li ntawd, PLCs tau pib txhawb ntau txoj kev sib txuas lus thiab cov qauv kev sib tshuam-xws li PROFINET, PROFIBUS, thiab Modbus- pab txhawb kev sib txuas lus yooj yim dua thiab sib pauv ntaub ntawv nrog lwm cov khoom siv.
Thaum lub sijhawm no, PLC daim ntawv thov tau nthuav dav dua li kev tsim khoom thiab tshuaj lom neeg kev lag luam rau hauv cov tsev ntse, kev xa khoom thauj khoom, thiab kev tswj xyuas hluav taws xob. Raws li qhov tshwm sim, PLC thev naus laus zis tau dhau los ua kev hloov pauv tas mus li, suav nrog kev tswj hwm qib siab zoo li fuzzy logic thiab neural network tswj kom zoo dua hloov mus rau qhov chaw ua haujlwm nyuaj thiab muaj zog.
IV. Niaj hnub nimno Era ntawm PLCs
Txij li thaum kaj ntug ntawm lub xyoo pua 21st, PLC txoj kev loj hlob tau nkag mus rau theem tshiab. Nrog kev nce ntawm Kev Lag Luam Hauv Is Taws Nem thiab kev nce qib hauv IoT thev naus laus zis, PLCs tau koom ua ke nrog huab xam thiab cov ntaub ntawv loj kom ua tiav kev tswj hwm ntse dua. PLCs tam sim no pab tsis tau tsuas yog kev sib txuas lus thiab cov ntaub ntawv sib koom ntawm cov khoom siv tab sis kuj tseem muaj kev sib txuas lus thiab cov ntaub ntawv sib pauv nrog huab servers, ua rau kev saib xyuas tej thaj chaw deb, kuaj xyuas qhov txhaum, thiab kev saib xyuas kev kwv yees.
Tsis tas li ntawd, tau tsav los ntawm kev nce qib hauv kev txawj ntse txawj ntse, PLCs tam sim no txhawb nqa kev tswj hwm kev tswj hwm thiab kev txiav txim siab ntau dua - ua cov tshuab. Piv txwv li, PLCs tuaj yeem siv cov kev kawm algorithms los txhim kho cov tswv yim tswj thiab txhim kho kev tsim khoom. Tib lub sijhawm, PLCs koom ua ke thiab koom tes nrog cov cuab yeej ntse xws li robots thiab sensors, ua kom muaj txiaj ntsig zoo dua thiab muaj kev txawj ntse kev lag luam automation ntau lawm.
V. Kev siv ntawm PLCs hauv Industrial Automation
PLCs nrhiav kev siv dav hauv kev lag luam automation, suav nrog kev tsim khoom, kev tsim tshuaj, kev tsim hluav taws xob, kev thauj mus los, petrochemicals, kev kho dej khib nyiab, thiab khoom siv kho mob. Hauv kev tsim khoom, PLCs tau siv dav siv rau kev tswj cov kab ntau lawm, cov kab sib dhos tsis siv neeg, cov kab ntim khoom siv tsis siv neeg, cov kab tshuaj tsuag txheej txheej, thiab cov kab vuam siv tshuab. Hauv kev thauj mus los, PLCs tswj cov teeb liab tsheb, lub nra conveyor hauv cov chaw nres tsheb thiab tshav dav hlau, thiab cov khoom siv thauj khoom siv tsis siv neeg. Hauv petrochemicals, PLCs tswj cov txheej txheem tswj, kev saib xyuas kev nyab xeeb, thiab tiag - sijhawm saib xyuas thiab kev hloov pauv ntawm qhov ntsuas kub, siab, thiab qib kua thaum lub sijhawm tsim khoom.
VI. Kev Txhim Kho Yav Tom Ntej ntawm PLCs
Raws li cov qib kev lag luam automation txuas ntxiv nce ntxiv thiab cov thev naus laus zis tshiab nce ntxiv, PLCs yuav tuav lawv lub luag haujlwm tseem ceeb hauv kev txhim kho yav tom ntej. Cov ntsiab lus tseem ceeb yav tom ntej muaj xws li:
Kev txawj ntse:Nrog rau kev nce qib ntawm kev txawj ntse thev naus laus zis, PLCs yuav suav nrog kev tswj hwm kev txawj ntse ntau dua thiab kev txiav txim siab- ua cov tshuab, ua kom muaj txiaj ntsig ntau dua thiab muaj txiaj ntsig kev lag luam automation ntau lawm.
Cloud Computing thiab Cov Ntaub Ntawv Loj:PLCs yuav koom ua ke nrog huab xam thiab cov ntaub ntawv loj loj los ua kom muaj kev sib txuas ntawm cov cuab yeej thiab cov ntaub ntawv sib qhia, ua kom yooj yim rau kev saib xyuas tej thaj chaw deb, kuaj xyuas qhov txhaum, thiab kev saib xyuas kev kwv yees.
Modularization thiab Standardization:Nyob rau hauv teb rau evolving industrial automation xav tau, PLC tsim yuav nce ntxiv hais txog modularity thiab standardization kom xa tau yooj yim thiab scalable daws.
Ntsuab thiab Eco-Tus phooj ywg:Nrog rau kev paub txog ib puag ncig thiab ua rau muaj kev kub ntxhov ntau zuj zus, PLCs yuav ua qhov tseem ceeb ntawm lub zog -txuag thiab eco- kev paub txog kev tsim thiab kev siv, pab txhawb kev txhim kho kom ruaj khov hauv kev lag luam automation.
VII. Xaus
Lub evolution ntawm PLCs (Programmable Logic Controllers) sawv cev rau kev taug kev ntawm kev nce qib thiab kev tsim kho tshiab. Los ntawm nws lub hauv paus pib los ntawm kev xav tau ntawm Asmeskas kev lag luam tsheb hauv xyoo 1960 mus rau nws txoj kev siv dav hauv kev lag luam niaj hnub no, PLCs tau dhau los ua cov cuab yeej tseem ceeb hauv kev lag luam. Qhov kev hloov pauv no yog los ntawm lawv cov kev ua haujlwm ruaj khov, kev ua haujlwm yooj yim, thiab kev ua tau zoo.
Ntau qhov tseem ceeb tshwm sim thoob plaws hauv kev txhim kho PLCs:
Technological Advancements thiab Functional Expansion:Nrog rau kev nce qib sai ntawm lub computer thiab cov thev naus laus zis digital, PLCs tau pom kev txhim kho ntau yam hauv kev ua lub zog, muaj peev xwm khaws cia, thiab muaj peev xwm sib txuas lus. Nyob rau tib lub sijhawm, lawv cov haujlwm tau nthuav dav los ntawm kev tswj cov logic yooj yim mus rau ntau txoj kev tswj xyuas cov tswv yim, kev txheeb xyuas cov ntaub ntawv, thiab kev saib xyuas tej thaj chaw deb.
Expansion of Application Domains:PLCs tau txuas ntxiv mus dhau lawv cov hauv paus pib tsim tsheb tsim kom muaj ntau yam kev lag luam suav nrog kev tsim khoom, kev tsim tshuaj, kev tsim hluav taws xob, kev thauj mus los, petrochemicals, kev kho dej khib nyiab, thiab khoom siv kho mob. Kev siv dav dav ntawm PLCs tau ua tiav kev lag luam automation ntau ntau thiab txhawb kev tsim khoom.
Intelligent thiab Networked Peev Xwm:Tsav los ntawm kev nce qib hauv kev txawj ntse txawj ntse thiab Is Taws Nem ntawm Yam (IoT) thev naus laus zis, PLCs tau dhau los ua neeg txawj ntse thiab sib koom tes. Tam sim no lawv tuaj yeem ua haujlwm tswj hwm txoj haujlwm nyuaj dua thaum sib txuas lus thiab sib pauv cov ntaub ntawv nrog rau lwm cov khoom siv ntse, ua kom muaj txiaj ntsig zoo dua thiab muaj txiaj ntsig kev lag luam automation ntau lawm.
Modularization thiab Standardization:Txhawm rau ua kom tau raws li kev lag luam sib txawv thiab cov neeg siv yuav tsum tau ua, PLC tsim tau nthuav dav ntxiv txog kev hloov pauv thiab kev tsim qauv. Modular architecture tso cai rau cov neeg siv xaiv thiab muab cov qauv tsim nyog rau kev daws teeb meem. Standardized interfaces thiab kev sib txuas lus raws tu qauv pab kom interoperability ntawm PLCs los ntawm txawv manufacturers, simplifying system upgrades thiab txij nkawm.
Ntsuab thiab Eco-Tus phooj ywg:Amidst nce thoob ntiaj teb kev paub txog ib puag ncig thiab ua rau muaj kev kub ntxhov ntawm lub zog, PLC tsim tau nce qhov tseem ceeb ntawm kev siv hluav taws xob thiab kev tiv thaiv ib puag ncig. Los ntawm cov tswv yim tswj kom zoo, txo kev siv hluav taws xob, thiab txo qis emissions, PLCs pab txhawb kev txhim kho kom ruaj khov hauv kev lag luam automation.
Saib tom ntej, PLCs yuav txuas ntxiv ua lub luag haujlwm tseem ceeb hauv kev lag luam automation. Nrog rau kev txhim kho thev naus laus zis tsis tu ncua thiab nthuav dav cov npe thov, PLC kev ua haujlwm thiab kev ua haujlwm yuav hloov mus ntxiv. Ib txhij, tau tsav los ntawm kev txhim kho kev lag luam hauv internet thiab IoT thev naus laus zis, PLCs yuav koom ua ke thiab koom tes nrog kev nce qib ntawm cov cuab yeej ntse, ua kom muaj txiaj ntsig zoo dua, txawj ntse, thiab muaj kev paub txog kev lag luam automation ntau lawm.