Nrog rau kev nce qib sai ntawm niaj hnub kev lag luam automation thiab kev txhim kho ntawm kev siv tshuab computer, kev sib txuas lus thev naus laus zis thiab kev tswj hwm thev naus laus zis, kev tswj hwm ib txwm muaj kev hloov pauv tsis tau pom dua thiab tab tom pib txhim kho hauv kev sib txuas lus. Cov qauv ntawm kev tswj hwm tau hloov zuj zus los ntawm thawj CCS (Computer Centralized Control System) mus rau tiam thib ob ntawm DCS (Distributed Control System) mus rau nrov FCS (Field Bus Control System). Cov kev xav tau rau cov ntaub ntawv loj thiab kev sib kis ceev xws li cov duab thiab lub suab teeb liab tau yug los rau kev sib xyaw ntawm Ethernet thiab kev tswj xyuas tes hauj lwm, uas tam sim no nrov hauv kev lag luam. Qhov no nthwv dej ntawm kev lag luam tswj kev sib txuas lus tau koom ua ke ntau yam kev siv thev naus laus zis xws li embedded technology, multi-standard industrial control network interconnection, wireless technology, thiab lwm yam, yog li nthuav qhov chaw loj hlob ntawm kev lag luam tswj kev lag luam thiab nqa txoj hauv kev tshiab. Cov khoom siv tseem ceeb ntawm kev tswj hwm kev lag luam hauv kev lag luam niaj hnub no feem ntau yog siv cov tshuab computer thiab PLC. Tam sim no cia peb tham txog kev sib raug zoo ntawm ob lub tuam txhab lag luam thiab lawv txoj kev sib raug zoo hauv kev nthuav dav.
PLC txhais tau tias yog Programmable Logic Controller, uas zoo ib yam li relay logic system. Relay logic feem ntau yog siv los tsim lub cev muaj zog Circuit Court thiab tag nrho cov tswj vaj huam sib luag ntawm relay. Hauv 30 xyoo dhau los, PLC tau tuav txoj haujlwm tseem ceeb hauv kev tswj hwm kev lag luam. Nws tuaj yeem ua kom lub sijhawm ua haujlwm tiag tiag ntawm cov txheej txheem; qhov kev ua tau zoo ntawm lub sijhawm ntawm kev nyeem ntawv thiab sau cov tswv yim thiab tso tawm (I / O) qhov tseem ceeb; nws tuaj yeem ua kom lub zog ntawm kev ua tiav thiab ua haujlwm txuas ntxiv. Thiab kev ntseeg tau; kev tiv thaiv kev tswj hwm thiab kev ua tiav los ntawm kev cuam tshuam sab nraud; kev ua haujlwm ywj pheej, kom ntseeg tau qhov tshwj xeeb ntawm kev tswj cov lus teb. Tus nqi ntawm PLC tau poob qis, thiab kev sib txuas lus muaj peev xwm tau txhim kho tsis tu ncua. Kev nce qib ntawm software kuj tau ua rau cov neeg siv tau yooj yim nkag mus rau hauv qhov chaw thiab siv, thiab PLC tuaj yeem ua rau kev tswj xyuas ntau dua. PLC tuaj yeem txhim kho automation efficiency thiab nce kev tsim khoom, txo cov nqi, thiab txhim kho kev hloov pauv kom tau raws li qhov kev hloov pauv hloov pauv.
Nrog rau kev qhia txog cov khoos phis tawj muaj nyob rau hauv kev tswj hwm kev lag luam, PLC tsis tau hloov tag nrho vim nws txoj kev sib koom ua ke sai nrog cov thev naus laus zis tshiab, xws li kev sib txuas hauv network ntau, kev ua haujlwm ceev, kev cia hauv zos thiab kev ua haujlwm yooj yim. Lwm qhov laj thawj yog tias kev sib koom ua ke ntawm ntau yam kev tswj hwm modules tsis muaj teeb meem kev sib raug zoo, uas txo cov nqi ntawm kev pib thiab kev txheeb xyuas qhov system, thiab muab qhov kev sim, kev ruaj ntseg zoo, kev tswj hwm ib puag ncig zoo.
Kev taw qhia txog kev tswj hwm kev lag luam hauv computer tau coj cov kev hloov pauv loj rau kev tsim khoom lag luam. Nws yog ib daim ntawv thov kev sib koom ua lag luam tshiab nrog kev hloov pauv ntau dua, txhim kho cov haujlwm ua haujlwm, txhim kho kev sib txuas, thiab txuag sijhawm thiab nyiaj txiag. Qhov sib txawv loj los ntawm PLC yog tias nws tso cai rau cov neeg siv los tswj ntau lub zog los ntawm lub khoos phis tawj siv tshuab tsis siv ntau PLC. Kev tswj hwm kev lag luam siv Windows, Linux, Android systems, thiab lwm yam, uas tuaj yeem txuas rau hauv qab ntawm lub Hoobkas thiab kev lag luam-theem ERP system los ntawm tus qauv interface. . Kev siv cov khoos phis tawj thiab PLC hauv automation tsis yog ib qho teeb meem ntawm kev xaiv ib lossis lwm qhov. Nyob rau hauv tam sim no los yog yav tom ntej nthwv dej ntawm automation, muaj computer thiab PLC muaj lawv tus kheej yam ntxwv. Hauv ntau qhov xwm txheej, cov txheej txheem tswj hwm suav nrog kev sib cais thiab kev tswj xyuas, yog li PLC thiab lub khoos phis tawj muaj peev xwm yuav ua haujlwm ib sab.
