Umsebenzi oyinhloko wesiguquli se-485 ukuguqula isignali ye-RS-232 enesiphetho esisodwa ibe isignali elinganiselwe ye-RS-485 noma i-RS-422. Ngenxa yokudluliswa kolwazi olude kanye nekhono eliqinile lokulwa nokuphazamiseka, iziguquli ze-rs485 zisetshenziswa kabanzi kwezokuxhumana ngokuvikeleka nakweminye imikhakha. Kodwa-ke, abasebenzisi bavame ukuhlangana nokuphazamiseka kwesignali. Ngakho-ke, yini ebangela ukuthi isiginali yokuguqula i-rs485 iphazamiseke?

1. Ukuphazamiseka okufanayo, okuvela ngokuyinhloko ekufanisweni komthwalo wesistimu okungenangqondo. Isibonelo, umugqa wesignali mude kakhulu, izintambo eziningi zenkanyezi (ibanga elide), umthwalo omningi, akukho ukumelana okufanayo kwesistimu, njll., okubangela ukuthi uhlelo lusebenze kahle futhi luhluleke ukusebenza ngokuzinza.

2. Ukuphazamiseka okuqinile kwemodi evamile. Lesi simo ngokuvamile sibangelwa ukugxiliswa okuqondile noma okungaqondile kwezinto ezitholwayo ezindaweni ezihlukene, okubangela ukuxhumana phakathi kolayini wesignali kanye "nendawo yesisetshenziswa" noma "indawo yedijithali yemishini" (ngokuvamile i-50 Hz) Okubangelwa isignali eyeqile. Ukwamukela ukusebenza kwesinye isikhathi akukho, noma akutholakali ngaso sonke isikhathi. Ngaphezu kwalokho, ukwamukelwa kwedatha akukwazi ukubonakala uma ibanga phakathi kokwamukela nokuthumela kuyimitha eyodwa.

3. Ukuhluleka kwezingxenyekazi zekhompuyutha, ngokuvamile ngenxa yokuthi kunomlando wamandla kagesi aphezulu emugqeni (ukushaywa kombani, ukuvuza), okubangela izinkinga nge-chip ye-rs485 yokuguqulela yemishini ngayinye ohlelweni, okuthinta ukwamukela konke.

4. Amaphutha emigqa, njengesekhethi yendawo efushane noma isifunda esiphukile emugqeni wesignali, ngokuvamile enza isistimu isebenze endaweni noma isebenze ngokujwayelekile, kodwa umsebenzi awuzinzile.