I-RS485 iyindinganiso kagesi echaza isendlalelo esibonakalayo sokusetshenziswa kubonwa, njengephrothokholi, isikhathi, idatha ye-serial noma ehambisanayo, kanye nezixhumanisi zonke zichazwa umklami noma amaphrothokholi esendlalelo esiphezulu.I-RS485 ichaza izici zikagesi zabashayeli nabamukelayo abasebenzisa imigqa yokudlulisa yamaphoyinti amaningi ebhalansile (ebuye ibizwe ngokuthi umehluko).
Izinzuzo
1. Ukudluliselwa okuhlukile, okwandisa ukungatheleleki komsindo futhi kunciphisa imisebe yomsindo;
2. Izixhumanisi zebanga elide, ezingafika ku-4000 amafidi (cishe amamitha angu-1219);
3. Izinga ledatha lifika ku-10Mbps (ngaphakathi kwamayintshi angu-40, cishe amamitha angu-12.2);
4. Abashayeli abaningi nabamukeli bangaxhunywa ebhasini elifanayo;
5. Ibanga elibanzi lemodi evamile livumela umehluko ongaba khona phansi phakathi komshayeli nomamukeli, okuvumela amandla kagesi aphezulu emodi evamile engu -7-12V.
Izinga lesiginali
I-RS-485 ingakwazi ukuhambisa ibanga elide ikakhulukazi ngenxa yokusetshenziswa kwezimpawu ezihlukile zokudlulisela.Uma kukhona ukuphazamiseka komsindo, umehluko phakathi kwamasignali amabili kulayini usengasetshenziselwa ukwahlulela, ukuze idatha yokudlulisela ingaphazanyiswa umsindo.
Umugqa wokuhlukanisa we-RS-485 uhlanganisa amasignali angu-2 alandelayo
A: Isignali engahlehli
B: Isignali yokuhlehla
Kungase futhi kube nesignali yesithathu edinga indawo eyireferensi evamile kuyo yonke imigqa ebhalansile, ebizwa ngokuthi i-SC noma u-G, ukuze imigqa ebhalansi isebenze kahle.Lesi siginali singakhawulela isignali yemodi evamile etholwe ekugcineni kokwamukela, futhi i-transceiver izosebenzisa lesi siginali njengenani lereferensi ukukala i-voltage kulayini we-AB.Izinga le-RS-485 liyakhuluma:
Uma I-MAKA (logic 1), i-voltage yesiginali yomugqa B iphezulu kunomugqa A
Uma i-SPACE (logic 0), i-voltage yesiginali yomugqa A iphezulu kunomugqa B
Ukuze kungabangi ukungaboni ngaso linye, isimiso esivamile sokuqamba amagama sithi:
TX+ / RX+ noma D+ esikhundleni sika-B (isiginali 1 iphakeme)
TX-/RX- noma D- esikhundleni sika-A (izinga eliphansi uma isignali 0)
I-Threshold Voltage:
Uma okokufaka kwe-transmitter kuthola izinga eliphezulu le-logic (DI=1), i-voltage yomugqa A iphezulu kunomugqa B (VOA>VOB);uma okokufaka kwe-transmitter kuthola izinga eliphansi le-logic (DI=0), i-voltage yomugqa A iphezulu kunomugqa B (VOA>VOB);I-voltage engu-B iphakeme kunomugqa A (VOB>VOA).Uma i-voltage yomugqa A ekufakweni kowamukelayo iphakeme kunaleyo yomugqa B (VIA-VIB>200mV), okukhiphayo kowamukelayo kuyizinga eliphezulu elinengqondo (RO=1);uma i-voltage yomugqa B kokokufaka kowamukelayo ingaphezulu kwaleyo yomugqa A (VIB-VIA>200mV), umamukeli ukhipha ileveli enengqondo ephansi (RO=0).
Umthwalo Weyunithi (UL)
Inombolo enkulu yabashayeli nabamukeli ebhasini le-RS-485 incike ezicini zabo zomthwalo.Kokubili imithwalo yomshayeli nomamukeli ikalwa ngokuqhathaniswa nomthwalo wamayunithi.Izinga le-485 libeka ukuthi amayunithi angama-32 angalayishwa ebhasini.
Imodi yokusebenza
I-interface yebhasi ingaklanywa ngezindlela ezimbili ezilandelayo:
I-Half-Duplex RS-485
I-Full-Duplex RS-485
Ngokuphathelene nokulungiselelwa kwamabhasi amaningi e-half-duplex njengoba kukhonjisiwe esithombeni esingezansi, idatha ingadluliswa kuphela ohlangothini olulodwa ngesikhathi.
Ukucushwa kwebhasi okuyiduplex okugcwele kukhonjisiwe esithombeni esingezansi, okuvumela ukuxhumana okubili ngesikhathi esisodwa phakathi kwamanodi ayinhloko nesigqila.
Ukunqanyulwa Kwebhasi Nobude Begatsha
Ukuze ugweme ukuboniswa kwesignali, ulayini wokudlulisa idatha kufanele ube nendawo yokugcina lapho ubude bekhebula bude kakhulu, futhi ubude begatsha kufanele bube bufushane ngangokunokwenzeka.
Ukunqanyulwa okulungile kudinga i-RT resistor termination efaniswe nesici se-impedance Z0 yolayini wokudlulisela.
Izinga le-RS-485 lincoma ukuthi i-Z0=120Ω yekhebuli.
Iziqu zekhebula zivamise ukunqanyulwa ngezihlungi ezingu-120Ω, eyodwa ekugcineni kwekhebula.
Ubude bukagesi begatsha (ibanga lekhondatha phakathi kwe-transceiver nesiqu sekhebula) kufanele libe ngaphansi kokukodwa kweshumi kwesikhathi sokukhuphuka kwedrayivu:
LStub ≤ tr * v * c/10
LStub= ubude begatsha obukhulu ezinyaweni
v = isilinganiso sezinga isignali ehamba ngayo ngekhebula ukuya esivinini sokukhanya
c = isivinini sokukhanya (9.8*10^8ft/s)
Ubude begatsha olude kakhulu buzobangela ukubonakaliswa kokukhishwa kwesignali kuthinte i-impedance.Isibalo esilandelayo siwukuqhathaniswa kobude begatsha elide kanye namagagasi amafushane obude begatsha:
Isilinganiso Sedatha Nobude Bekhebula:
Uma usebenzisa amanani edatha aphezulu, sebenzisa kuphela izintambo ezimfishane.Uma usebenzisa amanani aphansi wedatha, izintambo ezinde zingasetshenziswa.Kuzinhlelo zokusebenza zejubane eliphansi, ukumelana kwe-DC kwekhebula kukhawulela ubude bekhebula ngokwengeza imajini yomsindo ngokwehla kwamandla kagesi kukhebula.Uma usebenzisa izinhlelo zokusebenza ezinezinga eliphezulu, imithelela ye-AC yekhwalithi yesignali yomkhawulo wekhebula kanye nomkhawulo wobude bekhebula.Isibalo esingezansi sinikeza ijika elilandelanayo lobude bekhebula nezinga ledatha.
I-Shenzhen Zhongling Technology Co., Ltd. (ZLTECH), kusukela yasungulwa ngo-2013, izibophezele embonini yamarobhothi anamasondo, ithuthukisa, ikhiqiza futhi idayise ama-wheel hub servo motors kanye nokushayela ngokusebenza okuzinzile.Abashayeli bayo bezimoto ze-servo hub ezisebenza kahle kakhulu i-ZLAC8015, i-ZLAC8015D ne-ZLAC8030L bamukela ukuxhumana kwamabhasi e-CAN/RS485, ngokulandelanayo basekela i-CiA301, i-CiA402 sub-protocol/modbus-RTU protocol ye-CANopen, futhi ingakhuphukela kumadivayisi ayi-16;ukwesekwa kokulawula isikhundla, ukulawula isivinini Kanye nokulawulwa kwe-torque nezinye izindlela zokusebenza, ezifanele amarobhothi ngezikhathi ezihlukahlukene, okukhuthaza kakhulu ukuthuthukiswa kwemboni yamarobhothi.Ukuze uthole ulwazi olwengeziwe mayelana namadrayivu e-servo ehabhu lamasondo e-ZLTECH, sicela unake: www.zlrobotmotor.com.
Isikhathi sokuthumela: Aug-04-2022