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Likou tsa puisano tsa RS485 tsa metara ea mofuta oa Lanry ke eng?

Boema-kepe ba puisano ba RS485 ke tlhaloso ea lisebelisoa tsa likou tsa puisano.Mokhoa oa wiring oa boema-kepe ba RS485 o ho topology ea libese, 'me boholo ba li-node tse 32 li ka hokeloa beseng e le 'ngoe.Ho RS485 marangrang a puisano ka kakaretso a amohela mokhoa oa puisano oa master-slave, ke hore, moamoheli ea nang le makhoba a mangata.Maemong a mangata, likhokahano tsa puisano tsa rS-485 li hokahantsoe feela le lipheletsong tsa "A" le "B" tsa sehokelo se seng le se seng ka A para ea lithapo tse sothehileng.Khokahano ena ea phetisetso ea data ke halofo - mokhoa oa puisano oa duplex.Sesebelisoa se ka romella kapa sa amohela data feela ka nako e itseng.Ka mor'a hore ho thehoe sebopeho sa puisano ea hardware, ho lokela ho lumellanoa ka protocol ea data pakeng tsa lisebelisoa tsa phetisetso ea data e le hore qetello ea ho amohela e ka fetisa lintlha tse amoheloang, e leng khopolo ea "protocol".Protocol ea puisano e na le sebopeho se kopaneng sa protocol, 'me lihlahisoa tsa rona kaofela li sebelisa protocol e tloaelehileng ea Modbus-RTU.Rs-485 sebaka se phahameng sa puisano se ka bang 1219m, ka lebelo le tlase, sebaka se sekhuts'oane, ha ho liketsahalo tsa tšitiso tse ka sebelisang mohala o tloaelehileng o sothehileng, ho fapana le hoo, ka lebelo le phahameng, phetisetso ea mohala o molelele, e tlameha ho sebelisoa ho ts'oara li-impedance (ka kakaretso 120 ω ) thapo e khethehileng ea RS485, le tikolohong e thata ea tšitiso le eona e lokela ho sebelisoa thapo e sirelelitsoeng ea lihlomo tse sothehileng.


Nako ea poso: Jul-22-2022

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