Raws li kev thov kev lag luam, PLC tswj cov txee tuaj yeem hloov kho kom muaj cov haujlwm hauv qab no:
Kev tawg- pov thawj tswj: Ua haujlwm tawg- pov thawj PLCs thiab cov khoom siv hluav taws xob, tsim nyog rau qhov chaw tawg thiab tawg xws li tshuaj lom neeg thiab roj / roj kev lag luam;
Kev tswj tsis tau rov qab: Teeb tsa nrog ob lub PLC kub standby system, ua kom tsis muaj kev sib hloov ntawm cov thaub qab PLC nyob rau hauv rooj plaub ntawm thawj PLC tsis ua hauj lwm, haum rau cov xwm txheej uas muaj kev ntseeg siab heev xws li lub zog thiab kev tsheb nqaj hlau;
Zog-txuag kev tswj: Ua kom zoo dua cov cuab yeej ua haujlwm logic los ntawm PLC (xws li kev tswj hwm qhov nrawm nrawm thiab ntawm -xav tau pib / nres) kom txo qis kev siv hluav taws xob.
Thaum kawg, kev ua haujlwm ntawm PLC tswj txee yog nyob ntawm PLC kho vajtse teeb tsa, software programming, thiab xaiv cov khoom siv peripheral, thiab tuaj yeem hloov kho kom haum raws li qhov xav tau ntawm cov khoom lag luam sib txawv.
