Ko te tauranga korero RS485 he whakaahuatanga taputapu mo nga tauranga korero.Ko te aratau waea o te tauranga RS485 kei roto i te topology pahi, a ko te 32 teitei ka taea te hono ki te pahi kotahi.I roto i te whatunga korero RS485 ka whakamahia te aratau korero rangatira-pononga, ara, he kaihautu me nga taurekareka maha.I te nuinga o nga wa, ka hono noa nga hononga whakawhitiwhiti rS-485 ki nga pito "A" me "B" o ia atanga me nga taura takirua takirua.Ko tenei hononga whakawhiti raraunga he haurua - aratau whakawhitiwhiti taarua.Ka taea e te taputapu te tuku, te whiwhi raraunga anake i te waa kua whakaritea.I muri i te whakatuutanga o te atanga whakawhitiwhiti taputapu, me whakaae he kawa raraunga i waenga i nga taputapu tuku raraunga kia taea ai e te mutunga whiwhi te poroporo i nga raraunga kua riro mai, koinei te kaupapa o te "kawa".Ko te kawa whakawhitiwhiti he whakatakotoranga kawa paerewa kotahi, ka whakamahia katoa e a maatau hua te kawa Modbus-RTU paerewa.Rs-485 morahi te tawhiti korero mo te 1219m, i roto i te tere iti, te tawhiti poto, karekau he waahi pokanoa ka taea te whakamahi i te raina whiri-rua noa, engari, i roto i te tere tere, te tuku raina roa, me whakamahi i te taurite impedance (te nuinga 120 ω). ) RS485 taura motuhake, me te i roto i te taiao pokanoa pakeke kia hoki te whakamahi Armoured whiri-rua taura paruru.
Wā tuku: Hūrae-22-2022