[AIPU-WATON] Uthini umahluko phakathi kwe-RS232 kunye ne-RS485?

Iiprothokholi zonxibelelwano olulandelelanayo zidlala indima ebalulekileyo ekudibaniseni izixhobo kunye nokwenza utshintshiselwano lwedatha. Imigangatho emibini esetyenziswa ngokubanziRS232kwayeRS485. Makhe sihlolisise umahluko phakathi kwabo.

· RS232Umgaqo-nkqubo

IRS232ujongano (ekwaziwa ngokuba yi-TIA/EIA-232) yenzelwe ukulawula unxibelelwano olulandelelanayo. Iququzelela ukuhamba kwedatha phakathi kweSixhobo seSiteshi seDatha (i-DTE), njengeetheminali okanye ii-transmitter, kunye neZixhobo zoNxibelelwano lweDatha (DCE). Nanga amanye amanqaku aphambili malunga ne-RS232:

1. Indlela yokusebenza:

   • RS232ixhasa zombinifull-duplexkwayeisiqingatha-duplexiindlela.
   • Kwimo ye-duplex epheleleyo, idatha ingathunyelwa kwaye ifunyenwe ngaxeshanye usebenzisa iingcingo ezihlukeneyo zokuhambisa kunye nokwamkelwa.
   • Kwimo ye-half-duplex, umgca omnye usebenza zombini ukuthumela kunye nokufumana imisebenzi, ukuvumela nokuba ibe nye ngexesha.

2. Umgama woNxibelelwano:

   • I-RS232 ifanelekileimigama emifutshanengenxa yothintelo kumandla omqondiso.
   • Imigama emide inokukhokelela ekuthotyweni komqondiso.

3. Amanqanaba ombane:

   • RS232 isebenzisaamanqanaba ombane alungileyo nangalungangayokubonisa.

4. Inani labafowunelwa:

   • Intambo ye-RS232 idla ngokuqulatha9 iingcingo, nangona ezinye izihlanganisi zinokusebenzisa iingcingo ezingama-25.

· RS485 Protocol

IRS485 or I-EIA-485iprotocol yamkelwa ngokubanzi kwiindawo zoshishino. Ibonelela ngeenzuzo ezininzi ngaphezulu kweRS232:

1. I-Multi-Point Topology:

   • RS485ivumelaabamkeli abaninzi kunye nabathumeliukudityaniswa kwibhasi enye.
   • Ukuhanjiswa kwedatha kuyasebenzaiimpawu ezahlukeneyoukuhambelana.

2. Indlela yokusebenza:

   • RS485ujongano ngeAbafowunelwa aba-2sebenza kwiimowudi enesiqingatha se-duplex, ukuthumela okanye ukufumana idata kuphela ngexesha elithile.
   • RS485ujongano ngeAbafowunelwa aba-4angabaleka angeneimowudi ephindwe kabini, evumela ukuhanjiswa kunye nokwamkelwa ngaxeshanye.

3. Umgama woNxibelelwano:

   • RS485uyagqwesa kwiunxibelelwano olude.
   • Ilungele usetyenziso apho izixhobo zisasazwa kumgama obalulekileyo.

4. Amanqanaba ombane:

   • RS485usebenzisaumqondiso wombane owahlukileyo, ukwandisa ukugonywa kwengxolo.

Isishwankathelo, i-RS232 ilula ukuqhagamshela izixhobo kumgama omfutshane, ngelixaRS485ivumela izixhobo ezininzi kwibhasi enye kumgama omde.

Gcina ukhumbula ukuba izibuko zeRS232 zihlala zisemgangathweni kwiiPC ezininzi kunye neePLC, ngelixaRS485amazibuko anokufuna ukuthengwa ngokwahlukeneyo.