RS485 nigipimo cyamashanyarazi gisobanura urwego rwumubiri rwimbere, nka protocole, igihe, urukurikirane cyangwa amakuru abangikanye, kandi amahuza byose bisobanurwa nuwashushanyije cyangwa protocole yo hejuru.RS485 isobanura ibiranga amashanyarazi biranga abashoferi n'abayakira bakoresheje umurongo uringaniye (nanone witwa itandukaniro).
Ibyiza
1. Ikwirakwizwa ritandukanye, ryongera ubudahangarwa bw'urusaku kandi rigabanya imirasire y'urusaku;
2. Guhuza intera ndende, kugera kuri metero 4000 (hafi metero 1219);
3. Igipimo cyamakuru agera kuri 10Mbps (muri santimetero 40, metero 12.2);
4. Abashoferi benshi nabakira barashobora guhuzwa na bisi imwe;
5. Ubugari bwagutse-busanzwe butuma habaho itandukaniro ryubutaka hagati yumushoferi nuwakiriye, bikemerera imbaraga nini-rusange ya voltage ya -7-12V.
Urwego rwibimenyetso
RS-485 irashobora gukora intera ndende cyane cyane bitewe no gukoresha ibimenyetso bitandukanye byo kohereza.Iyo habaye urusaku rw urusaku, itandukaniro riri hagati yibimenyetso byombi kumurongo rirashobora gukoreshwa mugucira urubanza, kugirango amakuru yoherejwe adahungabanywa n urusaku.
Umurongo utandukanye wa RS-485 urimo ibimenyetso 2 bikurikira
Igisubizo: Ikimenyetso kidahinduka
B: Ikimenyetso gisubiza inyuma
Hashobora kandi kuba ikimenyetso cya gatatu gisaba ingingo ihuriweho kumurongo wose uringaniye, witwa SC cyangwa G, kugirango imirongo iringaniye ikore neza.Iki kimenyetso gishobora kugabanya ibimenyetso bisanzwe-byakiriwe byakiriwe kurangiza, kandi transceiver izakoresha iki kimenyetso nkigiciro cyo gupima voltage kumurongo wa AB.Ibipimo bya RS-485 bivuga:
Niba MARK (logic 1), umurongo B ibimenyetso bya voltage birenze umurongo A.
Niba UMWANYA (logic 0), umurongo Ikimenyetso cya voltage iri hejuru yumurongo B.
Kugirango udatera kutumvikana, amasezerano rusange yo kwita izina ni:
TX + / RX + cyangwa D + aho kuba B (ikimenyetso 1 ni kinini)
TX- / RX- cyangwa D- aho kuba A (urwego rwo hasi iyo ikimenyetso 0)
Umuvuduko wa Threshold:
Niba insimburangingo yinjiza yakira urwego rwohejuru (DI = 1), umurongo A voltage irenze umurongo B (VOA> VOB);niba insimburangingo yinjiza yakira logique yo hasi (DI = 0), umurongo A voltage irenze umurongo B (VOA> VOB);Umuvuduko wa B uruta umurongo A (VOB> VOA).Niba voltage y'umurongo A ku iyinjira ryakiriwe irenze iy'umurongo B (VIA-VIB> 200mV), ibisohoka byakira ni logique yo hejuru (RO = 1);niba voltage yumurongo B ku iyinjizwa ryabakiriye irenze iyumurongo A (VIB-VIA> 200mV), uwakiriye asohora logique yo hasi (RO = 0).
Umutwaro Wibice (UL)
Umubare ntarengwa w'abashoferi n'abakira kuri bisi ya RS-485 biterwa n'imiterere yabyo.Byombi umushoferi niyakira byapimwe ugereranije nuburemere bwimitwaro.Igipimo cya 485 giteganya ko imitwaro ntarengwa 32 ishobora kwomekwa kuri bisi yohereza.
Uburyo bukoreshwa
Imigaragarire ya bisi irashobora gushushanywa muburyo bubiri bukurikira:
Igice cya kabiri-RS-485
Byuzuye-Duplex RS-485
Kubijyanye na bisi nyinshi-duplex iboneza nkuko bigaragara ku gishushanyo gikurikira, amakuru arashobora kwimurwa gusa icyerekezo kimwe icyarimwe.
Ibikoresho byuzuye-duplex byerekanwe mubishushanyo bikurikira, byemerera inzira ebyiri icyarimwe itumanaho hagati ya shobuja numucakara.
Guhagarika bisi & Uburebure bwishami
Kugirango wirinde ibimenyetso byerekana, umurongo wohereza amakuru ugomba kugira aho urangirira mugihe uburebure bwa kabili ari ndende cyane, kandi uburebure bwishami bugomba kuba bugufi bushoboka.
Kurangiza neza bisaba guhagarika birwanya RT bihuye nibiranga impimbano Z0 y'umurongo wohereza.
Ibipimo bya RS-485 birasaba ko Z0 = 120Ω kuri kabili.
Imiyoboro ya kabili isanzwe irangizwa na 120Ω résistoriste, imwe kuri buri mpera yumugozi.
Uburebure bw'amashanyarazi bw'ishami (intera iyobora hagati ya transceiver na kabili ya kabili) igomba kuba munsi ya kimwe cya cumi cyigihe cyo kuzamuka:
LStub ≤ tr * v * c / 10
LStub = uburebure bwishami ntarengwa mubirenge
v = ikigereranyo cyikigereranyo ikimenyetso kigenda kuri kabili n'umuvuduko wurumuri
c = umuvuduko wurumuri (9.8 * 10 ^ 8ft / s)
Uburebure bwamashami maremare bizatera ibimenyetso byerekana ibyuka byerekana ingaruka.Igishushanyo gikurikira nikigereranyo cyuburebure bwishami rirerire hamwe nuburebure bwamashami maremare:
Igipimo cyamakuru & Uburebure bwa Cable:
Mugihe ukoresheje ibipimo bihanitse, koresha insinga ngufi.Iyo ukoresheje igipimo gito cyamakuru, insinga ndende zirashobora gukoreshwa.Kubintu byihuta byokoresha, DC irwanya umugozi igabanya uburebure bwumugozi wongeyeho urusaku runyuze mumashanyarazi ya voltage hejuru yumugozi.Iyo ukoresheje progaramu yo murwego rwohejuru, ingaruka za AC za kabili ntarengwa yerekana ibimenyetso kandi igabanya uburebure bwa kabili.Igishushanyo gikurikira kiratanga umurongo urenze umurongo wuburebure bwikigereranyo nigipimo cyamakuru.
Shenzhen Zhongling Technology Co., Ltd. (ZLTECH), kuva yashingwa mu 2013, yiyemeje gukora inganda z’ibimuga, guteza imbere, gukora no kugurisha ibiziga bya moteri ya servo na moteri ikora neza.Imashini ikora cyane ya servo hub abashoferi ba ZLAC8015, ZLAC8015D na ZLAC8030L bemeza itumanaho rya bisi ya CAN / RS485, buri kimwe gishyigikira CiA301, CiA402 sub-protocole / modbus-RTU protocole ya CANopen, kandi irashobora gushiramo ibikoresho bigera kuri 16;shyigikira kugenzura imyanya, kugenzura umuvuduko Kandi kugenzura torque nubundi buryo bwo gukora, bubereye robot mubihe bitandukanye, biteza imbere cyane iterambere ryinganda za robo.Kubindi bisobanuro kubyerekeye ibiziga bya ZLTECH hub servo drives, nyamuneka witondere: www.zlrobotmotor.com.
Igihe cyo kohereza: Kanama-04-2022