[AIPU-WATON] Dab tsi yog qhov txawv ntawm RS232 thiab RS485?

Serial Kev Sib Txuas Txuj Ua Si ib lub luag haujlwm tseem ceeb hauv kev sib txuas thiab ua kom cov ntaub ntawv sib pauv. Ob tus qauv siv dav dav yogRs232thiabRS485Cov. Cia relve mus rau hauv lawv qhov sib txawv.

· Rs232Raws tu raws tu raws tu txheej

TusRs232Interface (tseem hu ua Tia / Eia-232) yog tsim los tswj kev sib txuas lus serial. Nws pab cov ntaub ntawv ntws ntawm cov ntaub ntawv davhlau ya nyob twg (DTE), xws li cov khoom lag luam lossis cov khoom xa tuaj, thiab cov ntaub ntawv sib txuas lus (DCE). Ntawm no yog qee cov ntsiab lus tseem ceeb txog RS232:

1. Hom kev ua haujlwm:

   • Rs232Txhawb ob qhotag nrho-duplexthiabIb nrab-Duplexqauv.
   • Nyob rau hauv tag nrho-duplex hom, cov ntaub ntawv tuaj yeem xa thiab tau txais ib txhij siv cov hlau sib cais rau kis thiab txais tos.
   • Hauv ib nrab-duplex hom, ib txoj kab ua ke pabcuam ob qho tib si xa thiab tau txais cov haujlwm, tso cai rau ib qho zuj zus.

2. Kev sib txuas lus nrug:

   • Rs232 yog qhov haum rauKev ncua luvVim tias cov kev txwv hauv teeb meem lub zog.
   • Ntev dua yuav ua rau muaj teeb meem teeb meem.

3. Qib Volrage:

   • Rs232 sivQhov zoo thiab tsis zoo voltage qibrau kev kos npe.

4. Cov naj npawb ntawm cov neeg:

   • Rs232 txuas ib qho twg muaj9 xov hlau, Txawm hais tias qee qhov sib txuas yuav siv 25 xaim.

· Rs485 raws tu qauv

TusRS485 or Eia-485Raws txoj kev cai yog kev xav tau ntawm cov chaw muaj kev lag luam. Nws muaj ntau qhov zoo dua RS232:

1. Ntau-point Topology:

   • RS485tso caiNtau cov neeg tau txais thiab transmitterskom txuas nrog rau tib lub npav.
   • Cov ntaub ntawv kis tauSib Txawv Kos Nperau xwm txheej.

2. Hom kev ua haujlwm:

   • RS485interfaces nrog2 tiv taujUa haujlwm nyob rau hauvIb nrab-duplex hom, tsuas yog xa lossis tau txais cov ntaub ntawv ntawm lub sijhawm.
   • RS485interfaces nrog4 Tiv Thaivtuaj yeem khiav hauvpuv-duplex hom, enable kev sib kis thiab txais tos.

3. Kev sib txuas lus nrug:

   • RS485txawj rau hauvKev sib txuas lus ntev.
   • Nws yog qhov zoo tagnrho rau cov ntawv thov uas kis tau hla mus deb.

4. Qib Volrage:

   • RS485kev sivCov kev sib txawv ntawm cov paib sib txawv, txhim kho cov suab tsis muaj zog.

Hauv cov ntsiab lus, RS232 yog qhov yooj yim rau kev sib txuas cov khoom siv ntau dua li kev ncua deb, thaumRS485Tso cai rau ntau cov khoom siv nyob rau tib lub npav hla kev deb dua.

Nco ntsoov tias RS232 feem ntau yog tus qauv ntawm ntau lub PCs thiab PLCS, hosRS485Ports yuav xav tau yuav nyias.