Sharaxaada faahfaahsan ee RS485 baska

RS485 waa halbeeg koronto oo qeexaya lakabka jireed ee is dhexgalka, sida borotokoolka, waqtiga, xogta taxan ama isbarbardhiga, iyo xiriirinta dhamaantood waxaa lagu qeexay naqshadeeyaha ama borotokoolka lakabka sare.RS485 waxay qeexaysaa sifooyinka korantada ee darawalada iyo qaatayaasha iyadoo la adeegsanayo xariiqyada gudbinta dhibcaha badan ee dheellitiran (sidoo kale loo yaqaan kala duwanaanshaha).

Faa'iidooyinka

1. Gudbinta kala duwan, taas oo kordhisa difaaca sanqadha oo yaraynaysa shucaaca qaylada;
2. Isku xirka masaafo dheer, ilaa 4000 cagood (qiyaastii 1219 mitir);
3. Heerka xogta ilaa 10Mbps (gudahood 40 inji, qiyaastii 12.2 mitir);
4. Darawallo badan iyo kuwa qaata ayaa lagu xidhi karaa bas isku mid ah;
5. Qaabka guud ee ballaadhan wuxuu u oggolaanayaa kala duwanaanshaha suurtagalka ah ee dhulka ee u dhexeeya darawalka iyo qaataha, taas oo u oggolaanaysa ugu badnaan korantada-habka caadiga ah -7-12V.

Heerka ishaarada

RS-485 waxay sameyn kartaa gudbinta fogaan fog inta badan sababtoo ah isticmaalka calaamadaha kala duwan ee gudbinta.Marka ay jirto faragelin sanqadh, farqiga u dhexeeya labada calaamadood ee khadka ayaa weli loo isticmaali karaa in lagu xukumo, si xogta gudbinta aysan u dhibin buuqa.

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Xariiqda RS-485 waxaa ku jira 2 calaamadood oo soo socda

J: Calaamad aan dib u laabanayn
B: Calan celin
Waxa kale oo jiri kara calaamad saddexaad oo u baahan barta tixraaca guud ee dhammaan xariiqyada dheellitiran, ee loo yaqaan SC ama G, si ay xadadka dheellitiran u shaqeeyaan si habboon.Digniintani waxay xaddidi kartaa calaamada hab-wadaaga ee lagu helo dhamaadka, transceiver-ku wuxuu u isticmaali doonaa calaamadan qiime tixraac ahaan si uu u cabbiro danabka khadka AB.Heerka RS-485 wuxuu sheegayaa:
Haddii MARK (macquul 1), danab signal line B uu ka sarreeyo line A
Haddii SPACE (macquul ah 0), xariiqda danabku waxa uu ka sarreeyaa xariiqda B
Si aan khilaaf u keenin, heshiiska guud ee magac bixinta waa:
TX+/RX+ ama D+ halkii B (caleenta 1 waa sare)
TX-/RX- ama D- halkii A (heerka hoose marka calaamadda 0)

Heerka Korantada:
Haddii gelinta gudbiyaha uu helo heer sare oo macquul ah (DI=1), korantada A ayaa ka sareysa xariiqda B (VOA>VOB);haddii gelinta gudbiyaha uu helo heerka hoose ee macquulka ah (DI=0), korantada A ayaa ka sareysa xariiqda B (VOA>VOB);Voltage B wuxuu ka sarreeyaa khadka A (VOB>VOA).Haddii danabka xariiqda A ee soo-gelinta soo-dhoweeyaha uu ka sarreeyo xariiqda B (VIA-VIB>200mV), soo-saarka soo-dhoweeyaha waa heer sare oo macquul ah (RO=1);Haddii danabka xariiqda B ee soo gelinta qaataha uu ka sarreeyo kan xariiqda A (VIB-VIA>200mV), qaataha waxa uu soo saaraa heer macquul ah oo hooseeya (RO=0).

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Cutubka Xamuulka (UL)

Tirada ugu badan ee darawalada iyo qaatayaasha baska RS-485 waxay ku xidhan tahay sifada rarka.Labada culays ee darawalka iyo qaataha waxa lagu cabbiraa marka loo eego culayska unugga.Heerka 485 waxa uu dhigayaa in ugu badnaan 32 xabbo lagu xidhi karo baska gudbinta.

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Qaabka Hawlgelinta

Interface-ka baska waxa loo qaabayn karaa laba siyaabood oo soo socda:
Half-Duplex RS-485
Full-Duplex RS-485
Marka laga hadlayo isku xidhka baska kala badh-kooblaha ah sida ku cad shaxanka hoose, xogta waxa loo wareejin karaa hal jiho oo keliya markiiba.

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Qaabeynta baska-duplex-ka buuxa ayaa lagu muujiyay shaxanka hoose, taas oo u oggolaanaysa xidhiidhka laba-geesoodka ah ee isku mar ah ee u dhexeeya sayidyada iyo qanjidhada addoonta.

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Joojinta Baska & Dhererka Laanta

Si looga fogaado milicsiga calaamadaha, xariiqda gudbinta xogta waa in ay lahaataa barta ugu dambeysa marka dhererka fiilada uu aad u dheer yahay, dhererka laantana waa inuu ahaadaa mid gaaban intii suurtagal ah.
Joojinta saxda ah waxay u baahan tahay iska celiyaha joojinta RT oo u dhigma cilad-celinta sifada Z0 ee khadka gudbinta.
Heerka RS-485 wuxuu ku talinayaa in Z0=120Ω ee fiilada.
Jirridda fiilooyinka waxaa badanaa lagu dhameeyaa 120Ω resistors, mid ka mid ah cidhif kasta oo fiilada ah.

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Dhererka korantada ee laanta (masaafada hagayaasha ee u dhexeeya transceiver iyo jirridda fiilada) waa in ay ka yaraataa toban meelood meel wakhtiga kor u kaca wadista:
LStub ≤ tr * v * c/10
LStub= dhererka laanta ugu badan ee cagaha
v = saamiga xawliga uu calaamaduhu ku socdo fiilada ilaa xawaaraha iftiinka
c = xawaaraha iftiinka (9.8*10^8ft/s)
Dhererka laanta oo aad u dheer waxay sababi doontaa milicsiga qiiqa calaamada inuu saameeyo xannibaadda.Jaantuska soo socdaa waa isbarbardhigga dhererka laanta dheer iyo mawjadaha dhererka laanta gaaban:

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Heerka Xogta & Dhererka Cable:
Markaad isticmaalayso qiimaha xogta sare, isticmaal kaliya fiilooyinka gaagaaban.Marka la isticmaalayo qiimaha xogta hoose, fiilooyinka dhaadheer ayaa la isticmaali karaa.Codsiyada xawaaraha hooseeya, iska caabinta DC ee fiilada ayaa xaddidaysa dhererka fiilada iyadoo ku daraysa dhawaaqa dhawaaqa iyada oo loo marayo dhibicda danab ee fiilada.Markaad isticmaalayso codsiyada heerka sare ah, saamaynta AC ee fiilada waxay xaddidaysaa tayada calaamada waxayna xaddidaysaa dhererka fiilada.Jaantuska hoose waxa uu bixiyaa qalooca muxaafidka ah ee dhererka fiilada iyo heerka xogta.

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Shenzhen Zhongling Technology Co., Ltd. (ZLTECH), tan iyo markii la aasaasay ee 2013, waxaa ka go'an in warshadaha Robot taayirrada, horumarinta, soo saarista iyo iibinta wheel hub servo matoorada iyo wadista waxqabadka deggan.Darawalada servo hub ee waxqabadkeeda sareeyo ZLAC8015, ZLAC8015D iyo ZLAC8030L waxay qaataan isgaarsiinta baska CAN/RS485, siday u kala horreeyaan waxay taageeraan CiA301, Protocol-hoosaadka CiA402/modbus-RTU ee borotokoolka CANopen, iyo kor u qaadi kara aaladaha 16xakamaynta booska taageerada, xakamaynta xawaaraha Iyo xakamaynta qulqulka iyo hababka kale ee shaqada, oo ku habboon robots waqtiyo kala duwan, si weyn u kor u qaadaya horumarinta warshadaha robotka.Wixii macluumaad dheeraad ah oo ku saabsan ZLTECH's wheel hub servo drives, fadlan fiiro gaar ah u yeelo: www.zlrobotmotor.com.


Waqtiga boostada: Agoosto-04-2022