Qhov nce ntawm programmable controllers yog inseparable los ntawm qhov yuav tsum tau ntawm txoj kev loj hlob ntawm niaj hnub industrial automation ntau lawm nyob rau hauv lub tebchaws United States. PLC tau tsim nyob rau xyoo 1960. Nyob rau lub sijhawm ntawd, General Motors ntawm Tebchaws Meskas, txhawm rau daws cov teeb meem ntawm lub sijhawm siv hluav taws xob hloov pauv ntawm cov kab ke tswj hwm kev tswj hwm thiab kev saib xyuas nyuaj thiab kev saib xyuas thaum lub Hoobkas cov kab ntau lawm tau hloov kho. Ua ntej qhov tshwm sim ntawm programmable logic controllers, kev tswj dav dav, kev tswj kev sib txuas thiab kev ruaj ntseg interlock logic tswj nyob rau hauv lub tsheb tsim kev lag luam yuav tsum cia siab rau ntau relays, timers thiab tshwj xeeb kaw-voj controllers kom tiav. Lawv loj loj thiab muaj suab nrov heev. Tsis tsuas yog kev saib xyuas txhua xyoo ua haujlwm ntau ntawm cov neeg ua haujlwm thiab cov khoom siv, tab sis kuj tseem muaj kev saib xyuas cov kev sib txuas ntawm cov relay-contactor system muaj cov kev xav tau siab rau kev ua haujlwm ntawm cov neeg ua haujlwm tu.
Hauv kev teb rau cov teeb meem no, General Motors Corporation ntawm Tebchaws Meskas tau tshaj tawm qhov kev sib tw qhib rau cov zej zog hauv xyoo 1968, xav kom tsim cov txheej txheem tshiab los hloov cov kab ke relay, thiab tau thov cov npe nrov "General Ten" kev sib tw. Tom qab ntawd, raws li lub tswv yim no, American Digital Equipment Corporation (DEC) tau ua tiav thawj PDP -14 maub los hauv xyoo 1969, uas tau siv thiab ua tiav hauv kev sib dhos tsis siv neeg ntawm lub tsheb. Txij li thaum lub kaw lus tau tsuas yog siv rau kev tswj hwm raws li cov txheej txheem thiab tsuas tuaj yeem ua qhov kev ua haujlwm zoo, nws tau hu ua Programmable Logic Controller (PLC).
Qhov ntxov tshaj plaws PLC tsuas yog muaj qhov yooj yim logic rau / tawm kev ua haujlwm, tab sis piv nrog cov kev tswj hwm ib txwm muaj, nws muaj qhov zoo ntawm kev hloov kho yooj yim, kev teeb tsa, kev kuaj mob thiab qhov chaw tsawg dua.
Thaum xyoo 1970s, PLC tau qhia txog microprocessor thev naus laus zis, uas ua rau PLC muaj kev ua lej lej thiab ntau lub teeb liab tso tawm / tawm tswv yim, thiab tuaj yeem sau ncaj qha cov kev pab cuam nrog cov cim ntaiv. Kev siv cov cuab yeej tshiab no tau ua rau muaj kev cuam tshuam loj heev hauv kev lag luam. Nyiv tau tshaj tawm cov thev naus laus zis no los ntawm Tebchaws Meskas xyoo 1971, thiab tsis ntev los no tau tsim nws tus kheej DCS-8 programmable logic controller. Lub teb chaws Yelemees thiab Fabkis kuj muaj lawv tus kheej thev naus laus zis los ntawm 1973 txog 1974. Tuam Tshoj tau ua tiav nws thawj qhov programmable logic controller hauv xyoo 1977, tab sis cov tub ntxhais ntawm microprocessor siv yog MC14500. Hauv nruab nrab -1970s, PLC lub luag haujlwm tau ntxiv nrog cov thev naus laus zis xws li kev sib txuas lus hauv chaw taws teeb, analog tso zis thiab cov tswv yim, thiab NC servo tswj. Tom qab xyoo 1980, PLC high-speed kev sib txuas lus network muaj nuj nqi tau qhia, thiab qee qhov tshwj xeeb tso zis / tawm tswv yim cuam tshuam, txiv neej-tshuab interface, cov lus qhia ua haujlwm siab, cov ntaub ntawv sau thiab tsom xam muaj peev xwm ntxiv rau tib lub sijhawm.