[AIPU-WATON] Uyini Umehluko Phakathi kwe-RS232 ne-RS485?

Amaphrothokholi okuxhumana ama-serial adlala indima ebalulekile ekuxhumaniseni amadivayisi nasekunikeni amandla ukushintshana kwedatha. Izindinganiso ezimbili ezisetshenziswa kabanzi ziyiRS232futhiRS485. Ake singene ekuhlukaniseni kwabo.

· RS232Iphrothokholi

IRS232isikhombimsebenzisi (esaziwa nangokuthi i-TIA/EIA-232) siklanyelwe ukulawula ukuxhumana kwe-serial. Isiza ukugeleza kwedatha phakathi Kwezisetshenziswa Zetheminali Yedatha (DTE), njengamatheminali noma izithumeli, kanye Nezisetshenziswa Zezokuxhumana Zedatha (DCE). Nawa amaphuzu abalulekile mayelana ne-RS232:

1. Indlela yokusebenza:

   • RS232isekela kokubilii-duplex egcwelefuthiisigamu-duplexizindlela.
   • Kumodi ye-duplex egcwele, idatha ingathunyelwa futhi yamukelwe kanyekanye kusetshenziswa izintambo ezihlukene zokudlulisela nokwamukela.
   • Kumodi ye-half-duplex, ulayini owodwa usebenza kokubili ukudlulisa nokwamukela imisebenzi, okuvumela eyodwa ngesikhathi.

2. Ibanga Lokuxhumana:

   • I-RS232 ilungeleamabanga amafushanengenxa yokulinganiselwa emandleni esignali.
   • Amabanga amade angase abangele ukucekelwa phansi kwesignali.

3. Amazinga kagesi:

   • RS232 ukusetshenziswaamazinga voltage positive kanye negativeyokusayina.

4. Inombolo Yoxhumana Nabo:

   • Ikhebuli engu-RS232 ngokuvamile iqukethe9 izintambo, nakuba ezinye izixhumi zingasebenzisa izintambo ezingu-25.

· RS485 Protocol

IRS485 or I-EIA-485I-protocol yamukelwa kabanzi ezilungiselelweni zezimboni. Inikeza izinzuzo ezimbalwa ngaphezu kwe-RS232:

1. I-Multi-Point Topology:

   • RS485ivumelaabemukeli abaningi nama-transmitterukuxhunywa ebhasini elifanayo.
   • Ukudluliswa kwedatha kuyasebenzaizimpawu ezahlukenelokuvumelana.

2. Indlela yokusebenza:

   • RS485ukuxhumana ne2 abathintwayosebenza kuimodi ye-half-duplex, ukuthumela kuphela noma ukwamukela idatha ngesikhathi esinikeziwe.
   • RS485ukuxhumana ne4 abathintwayoangagijima angeneimodi ye-duplex egcwele, okuvumela ukudluliswa nokwamukela kanyekanye.

3. Ibanga Lokuxhumana:

   • RS485uyaphumelela kuukuxhumana okude.
   • Ilungele izinhlelo zokusebenza lapho amadivaysi asabalale kumabanga abalulekile.

4. Amazinga kagesi:

   • RS485isebenzisaumehluko we-voltage signaling, kuthuthukisa ukuvikeleka komsindo.

Kafushane, i-RS232 ilula ekuxhumeni amadivayisi ebangeni elifushane, kuyilaphoRS485ivumela amadivayisi amaningi ebhasini elilodwa emabangeni amakhulu.

Khumbula ukuthi izimbobo ze-RS232 zivame ukujwayelekile kuma-PC amaningi nama-PLC, kuyilaphoRS485amachweba angase adinge ukuthengwa ngokuhlukana.