[AIPU-Waton] Uyini umehluko phakathi kwama-RS232 nama-RS485?

Amaphrothokholi wokuxhumana we-serial adlala indima ebalulekile ekuxhumaniseni amadivayisi futhi anikeze amandla ukushintshana kwedatha. Amazinga amabili asetshenziswa kabanziI-RS232na-I-Rs485. Masinikeze ukwahluka kwabo.

· I-RS232Umthetho olandelisayo

Le khasiI-RS232I-interface (eyaziwa nangokuthi iTia / Eia-232) yenzelwe ukulawula ukuxhumana kwe-serial. Inika amandla ukugeleza kwedatha phakathi kwemishini yokugcina idatha (i-DTE), njengama-terminals noma ama-transmitters, kanye nemishini yokuxhumana yedatha (DCE). Nawa amanye amaphuzu asemqoka nge-RS232:

1. Imodi yokusebenza:

   • I-RS232isekela zombiliI-Dumplex ephelelena-Half-duplexizindlela.
   • Kwindlela ephelele ye-duplex, idatha ingathunyelwa futhi itholwe ngasikhathi sinye ngokusebenzisa izintambo ezihlukile zokudlulisela nokwamukela.
   • Kwindlela ye-Half-Duplex, umugqa owodwa usebenza ngokudlulisa nokwamukela imisebenzi, okuvumela noma kukodwa ngasikhathi.

2. Ibanga lezokuxhumana:

   • I-RS232 ilungeleamabanga amafushanengenxa yokulinganiselwa kumandla wesiginali.
   • Amabanga amade angaholela ekuwohlokeni kwesiginali.

3. Amazinga we-Voltage:

   • I-RS232 isebenzisaamazinga amahle namandla amabiukusayina.

4. Inani Lothintana Nabo:

   • Intambo ye-RS232 imvamisa iqukethe9 izintambo, yize ezinye izixhumi zingasebenzisa izintambo ezingama-25.

· RS485 Protocol

Le khasiI-Rs485 or EIA-485I-Protocol yamukelwa kabanzi kuzilungiselelo zezimboni. Inikeza izinzuzo eziningana ngaphezulu kwe-RS232:

1. I-Multi-Point topology:

   • I-Rs485ivumelaabamukeli abaningi kanye nama-transmittersukuxhunywa ebhasini elifanayo.
   • Ukuhanjiswa kwedatha kuyaqashaamasiginali ahlukilengokuvumelana.

2. Imodi yokusebenza:

   • I-Rs485kuhlangana nge2 Oxhumana NaboSebenza ngaphakathiImodi ye-Half-duplex, ukuthumela noma ukuthola idatha ngesikhathi esithile.
   • I-Rs485kuhlangana ngeAbangu-4 Oxhumana Naboingangena ngaphakathiImodi Egcwele I-Dumplex, kunika amandla ukuthunyelwa kanyekanye kanye nokwamukela.

3. Ibanga lezokuxhumana:

   • I-Rs485kudlulaUkuxhumana Okude.
   • Ilungele izinhlelo zokusebenza lapho amadivaysi asakazeka khona amabanga aphambili.

4. Amazinga we-Voltage:

   • I-Rs485sebenzisaUkuhlukaniswa kweVoltage ehlukile, Ukuthuthukisa ukungavikeki komsindo.

Ngamafuphi, i-RS232 ilula ngamadivayisi okuxhuma amabanga amafushane, ngenkathiI-Rs485Ivumela amadivayisi amaningi ebhasini elifanayo ngaphezulu kwamabanga aphezulu.

Khumbula ukuthi amachweba ama-RS232 ajwayele ukulinganisa kuma-PC amaningi nama-PLCs, kantiI-Rs485Amachweba angadinga ukuthenga ngokwahlukile.