An ruɗe game da tushen asali da nau'in nutsewa a cikin PLCs? Ga sauƙaƙen bayani:
An ruɗe game da tushen asali da nau'in nutsewa a cikin PLCs? Ga sauƙaƙen bayani:
Source vs Sink: Domin transistor circuits, tushen (PNP) yana nufin IO circuit yana samar da halin yanzu, yayin da nutse (NPN) yana nufin yana ɗaukar halin yanzu.
DO (Fitowar Dijital):
Abubuwan fitowar PNP (tushen) na gama gari ne a cikin jerin Siemens 300/400 da PLCs na Turai. Suna da tushen wutar lantarki na ciki, don haka halin yanzu yana gudana ta hanyar DO, yana ba da damar tuki kai tsaye ba tare da ikon waje ba.
Abubuwan da ake samu na NPN (sink) sune na yau da kullun a cikin Jafananci, Taiwanese, jerin Siemens 200, da galibin PLC na cikin gida. Suna buƙatar wayoyi na waje zuwa tushen wutar lantarki na 24V, tare da halin yanzu yana gudana daga na'urorin waje zuwa tsarin fitarwa.
DI (Input na Dijital):
Bambance-bambancen ya dogara da jagorancin gudana na yanzu dangane da tashar DI.
Gabaɗaya, idan an haɗa COM na DI zuwa 24V kuma shigarwar tana aiki a 0V, halin yanzu yana fita (tushen). Idan an haɗa COM zuwa 0V kuma shigarwa yana aiki a 24V, halin yanzu yana gudana a cikin ( nutsewa).
Bayanan kula na musamman akan PLCs na Jafananci: Wasu (kamar Mitsubishi) suna ayyana DI bisa nau'ikan fitarwa mai karɓuwa. DI wanda zai iya karɓar tushen DO ana kiransa "shigarwar tushen"; wanda zai iya karɓar sink DO shine "shigar nutsewa".
Haɗin DIDO: Source DI na iya haɗawa zuwa nutsewar DO, kuma akasin haka. Haɗin nau'in DI/DO iri ɗaya na iya buƙatar jujjuyawar juye-juye ko wasu matakan hana jujjuyawar polarity.
Siemens PLC kasuwar kasuwa
Sink Logic: Sigina ON lokacin da halin yanzu ke gudana daga tashar shigarwa.
Ma'anar Tushen: Sigina ON lokacin da halin yanzu ke gudana cikin tashar shigarwa.
Tare da ingantaccen wutar lantarki, ƙananan ƙarfin lantarki (0V) a tashar shigarwa yayin siginar "ON" yana nuna ma'anar nutsewa; babban ƙarfin lantarki (yawanci 24V) yana nuna ma'anar tushe.
Abubuwan shigar da tushe suna da inganci mai inganci (gudanar da ke gudana a yanzu), yayin da abubuwan shigar da ruwa suna da ƙarancin matakin inganci (fitowa na yanzu).
Mitsubishi FX3U:
Tushen: Yana gudana a halin yanzu, tare da halayen fitowar transistor na PNP.
nutsewa: Yana gudana a halin yanzu, tare da halayen fitarwa na NPN.
Abubuwan da ake so na yanki:
S7-200 PLCs na iya ɗaukar nau'ikan nutsewa da nau'ikan tushe, yayin da S7-300 PLCs galibi tushe ne. Yammacin Turai sau da yawa yana amfani da nau'ikan tushe tare da masu sauya PNP don manyan abubuwan shigar da bayanai. Japan da Koriya ta Kudu sun fi son nau'ikan nutsewa, ta yin amfani da maɓallan NPN don ƙaramar bayanai.
Abubuwan da aka samo asali sune ingantattun sandunan DC, abubuwan nutsewa mara kyau ne. Siemens PLCs yawanci suna da duka biyun, amma tushen ya fi kowa. Mitsubishi PLCs suna goyan bayan abubuwan shigarwa guda biyu, amma nutsewa ya fi kowa yawa, daidai da maɓallan kusancin nau'in NPN.