Yintoni i-RS 422? Ukuqonda iSerial Communication Standard
Umgangatho we-RS-422, owaziwa ngokuba yi-TIA/EIA-422, yinxalenye ephambili yonxibelelwano olulandelelanayo. Isetyenziswa kakhulu kwimizi-mveliso nakwimimandla ye-automation. Isebenzisa umqondiso wokwahluka kunye nolungelelwaniso lombane olungeleleneyo wedijithali ukuhanjiswa kwedatha okuthembekileyo.
Lo mgangatho wenziwa yi-Electronic Industries Alliance (EIA). Iyathandwa kuba ilungile ekuthumeleni idatha kumgama omde.
Umgangatho we-RS-422 uneempawu ezibalulekileyo. Ukubonakaliswa kwayo okwahlukileyo kunye nokulungelelaniswa kombane wombane wedijithali kuyenza igqibelele ukugqithiselwa kwedatha ngokukhawuleza nangokuthembekileyo. Ihlala isetyenziswa kunxibelelwano olulandelelanayo, apho ukuthumela idatha kubaluleke kakhulu.
Kwimizi-mveliso kunye ne-automation, i-RS-422 inceda izixhobo zithethane. Ilungile kugqithiso lwedatha olude. Ikwasetyenziswa kunxibelelwano olulandelelanayo, apho ugqithiso lwedatha lungundoqo.
Isiqulatho
Izinto eziphambili zokuThatha
Umgangatho we-RS-422 ngumgangatho wonxibelelwano olulandelelanayo olusebenzisa umqondiso wokwahluka kunye ne-balanced voltage digital interface.
Umgangatho usetyenziswa kakhulu kwimizi-mveliso nakwizicelo zomatshini ngenxa yokukwazi ukuxhasa ukuhanjiswa kwedatha kumgama omde.
Umgangatho we-RS-422 ulungele izicelo ezifuna ukuhanjiswa kwedatha ngesantya esiphezulu nesithembekileyo.
Umgangatho usetyenziswa ngokuqhelekileyo kwizicelo zonxibelelwano olulandelelanayo, apho ukuhanjiswa kwedatha kubaluleke kakhulu.
Umgangatho we-RS-422 ukwabizwa ngokuba yi-TIA/EIA-422.
Umgangatho uxhasa ukuhanjiswa kwedatha phakathi kwezixhobo kushishino kunye nosetyenziso oluzenzekelayo.
Iinkcukacha zoBugcisa zeRS-422
I-RS-422 yiprothokholi edumileyo yonxibelelwano olulandelelanayo. Iyaziwa ngokuthenjwa kunye nokusebenza kakuhle. Isebenzisa umqondiso wokwahluka, olwa ingxolo kakuhle. Le ndlela ithumela idatha phezu kweentambo ezimbini ezijijekileyo, ezifikelela kwi-1,200 yeemitha okanye i-3,900 yeenyawo.
I-RS-422 isebenza kunye ne-topology ye-point-to-point kunye ne-unidirectional multidrop ukusetha ibhasi. Kwi-point-to-point, omnye umqhubi uthetha nomntu omnye. Kwibhasi ye-multidrop, umqhubi omnye uthetha nabamkeli abaninzi. Ukuya kwii-32 izixhobo zinokudibanisa kwibhasi ye-multidrop, kunye nomqhubi omnye kunye nabamkeli be-31.
Le theyibhile ilandelayo ishwankathela iinkcukacha ezingundoqo zobugcisa ze-RS-422:
| Ipharamitha | Ixabiso |
| Ubuninzi bomgama | 1,200 yeemitha(3,900 iinyawo) |
| Ubuninzi bezixhobo | 32 (1umqhubi, 31 abamkeli) |
| Uhlobo lweCable | Iintambo eziphothiweyo |
| I-Topology | Inqaku ngenqaku, Unidirectional multidrop ibhasi |
Ukwazi ezi nkcazo kubalulekile ekusekweni kwe-RS-422 iinkqubo. Inceda ukuqinisekisa ukuba idatha ihamba ngokuthembekileyo nangempumelelo kwimigama emide.
I-Topology yeNethiwekhi kunye noLungiselelo lweSixhobo
I-Electronic Industries Alliance (EIA) yazisa iRS-422 ngo-1975. Yathatha indawo ye-RS-232C, inika isantya esingcono, i-immunity immunity, kunye nobude bentambo ezinde. Lo mgangatho uxhasa unxibelelwano olupheleleyo lwe-duplex, ukuvumela ukuhanjiswa kwedatha kunye nokwamkelwa ngaxeshanye.
I-topology yenethiwekhi ye-RS-422 idla ngokuqulatha isixhobo esiyintloko esinye kunye nezixhobo ezininzi zamakhoboka. Ziqhagamshelwe kusetyenziswa iindidi ezahlukeneyo zokudibanisa, ezifana ne-DB-25 kunye ne-DC-37.
Enye yeenzuzo eziphambili ze-RS-422 kukukwazi ukuxhasa ubude bekhebula elide. Oku kuyenza ilungele usetyenziso lwemizi-mveliso apho izixhobo zihlala zohlulwa yimigama emikhulu. Umgangatho wokungangeni kwengxolo ikwaqinisekisa ukuhanjiswa kwedatha ethembekileyo, nakwindawo ezinamanqanaba aphezulu okuphazamiseka kombane.
Uqwalaselo lweSixhobo
Ukucwangciswa kwesixhobo kubalulekile kwiinethiwekhi ze-RS-422. Imisela ukuhamba kwedatha phakathi kwezixhobo. Isixhobo esiyintloko silawula ngokuqhelekileyo inkqubo yokunxibelelana, ukuthumela imiyalelo kwizixhobo zekhoboka kunye nokufumana idatha ekuphenduleni.
Ukusetyenziswa konxibelelwano olupheleleyo lwe-duplex kwenza ukuhanjiswa kwedatha ngaxeshanye kunye nokwamkelwa. Oku kwandisa ukusebenza kakuhle ngokubanzi kwenethiwekhi.
I-Network Topology
I-topology yenethiwekhi ye-RS-422 inokuqwalaselwa ngeendlela ezahlukeneyo, kuxhomekeke kwisicelo esithile. Ezinye ii-topology eziqhelekileyo ziquka i-point-to-point, i-point-to-multipoint, kunye ne-multipoint.
Ukukhethwa kwe-topology kuxhomekeke kwinani lezixhobo, umgama phakathi kwazo, kunye nesantya esifunekayo sothumelo lwedatha. Ngokuqonda i-topology yothungelwano kunye noqwalaselo lwesixhobo, abasebenzisi banokwandisa uthungelwano lwabo lweRS-422 yothumelo lwedatha oluthembekileyo nolusebenzayo.
Yintoni umahluko phakathi kwe-RS-232 kunye ne-RS-422
I-RS-232 kunye ne-RS-422 yahluke kakhulu kwindlela abathumela ngayo iimpawu. I-RS-232 isebenzisa ukubonakaliswa okukodwa. Ngakolunye uhlangothi, i-RS-422 isebenzisa ukubonakaliswa okungafaniyo. Olu tshintsho luchaphazela amaxabiso edatha, umgangatho wophawu, kunye nokuba umqondiso ungahamba umgama ongakanani.
I-RS-232C, ukwandiswa kwe-RS-232, iphinda isebenzise ukubonakaliswa okukodwa. Oku kunciphisa imilinganiselo yedatha kunye nomgangatho wesignali xa kuthelekiswa ne-RS-422. I-RS-422 yokubonisa umahluko, nangona kunjalo, ixhasa amaxabiso aphezulu edatha kunye nomgangatho ongcono wesignali kumgama omde.
Ukuthelekiswa kweempawu zoMqondiso
Nantsi eyona mahluko phakathi kwe-RS-232 kunye ne-RS-422:
RS-232: umqondiso onesiphelo esisodwa, amanani asezantsi edatha, kunye nokunciphisa umgangatho wesignali phezu kobude bekhebula elide.
RS-422: umqondiso wokwahluka, amanani aphezulu edatha, kunye nomgangatho ophuculweyo wesignali kubude bekhebula ezinde.
Ukuthelekiswa kweNgcaciso zeCable
Iingcaciso zentambo zikwahluka phakathi kwezi zimbini. Iintambo ze-RS-422 ziyakwazi ukuphatha ubude obude ngenxa yeempawu ezihlukeneyo. Oku kugcina umgangatho womqondiso ungcono. Iintambo ze-RS-232, nangona kunjalo, zinobude obufutshane ngenxa yophawu olulodwa oluphela.
Ngamafutshane, ukukhetha phakathi kwe-RS-232 kunye ne-RS-422 kuxhomekeke kwiimfuno zakho. I-RS-422 ingcono kwizicelo ezifuna amazinga aphezulu edatha kunye nobude bekhebula ubude. I-RS-232 ilungile kwimigama emifutshane kunye neemfuno ezisezantsi zezinga ledatha.
Yintoni umahluko phakathi kwe-RS-422 kunye ne-RS-485
I-RS-422 kunye ne-RS-485 yahluke kakhulu ekusekweni kwabo kunye nendlela izixhobo ezixhuma ngayo. I-RS-485 isebenzisa i-architecture yebhasi, ivumela izixhobo ezininzi ukwabelana ngomgca omnye. Oku kuhle kwiiseto ezifuna uqhagamshelo oluninzi. I-RS-422, nangona kunjalo, yenzelwe ukudibanisa ngqo phakathi kwamanqaku amabini.
I-RS-485 ingcono kwiiprojekthi ezifuna izixhobo ezininzi zokuthetha omnye komnye. Ikuvumela ukuba udibanise abaqhubi abaninzi kumgca omnye. Oku kukulungele ukusetwa kwemizi-mveliso apho izixhobo ezininzi kufuneka zinxibelelane. I-RS-422, kunye nomqhubi wayo omnye kunye nesibini somamkeli, ingcono kunxibelelwano oluthe ngqo, oluchanekileyo.
Itopology yenethiwekhi: I-RS-485 yisakhiwo sebhasi, ngelixa i-RS-422 i-topology ye-point-to-point
Ubumbeko lwesixhobo: I-RS-485 ivumela abaqhubi abaninzi kunye nabamkeli, ngelixa i-RS-422 inomqhubi omnye kunye nommkeli.
Layisha umgangatho: I-RS-485 inomgangatho womthwalo we-12-kΩ, ngelixa i-RS-422 inomgangatho womthwalo owahlukileyo.
Ukwazi umahluko phakathi kwe-RS-422 kunye ne-RS-485 ngundoqo ekukhetheni okulungileyo kwiprojekthi yakho. Cinga ngohlobo lwenethiwekhi, indlela izixhobo ezinxibelelana ngayo, kunye nomgangatho womthwalo. Oku kukunceda ukhethe owona mgangatho ungcono kwiimfuno zakho, nokuba yiRS-422 okanye iRS-485.
Izinto eziluncedo zeRS-422 Ngaphezu kweminye iMigangatho
I-RS-422 ineenzuzo ezininzi, ngakumbi kwiindawo zoshishino kunye ne-automation. Inokuphatha inani elikhulu lezikhululo, ezilungele iinkqubo ezinkulu. Kananjalo inokumelana nomthwalo ophezulu, ukuqinisekisa ukuba idatha ithunyelwa ngokuthembekileyo.
Izinto eziluncedo kwi-Industrial Applications
Kwiimeko zoshishino, i-RS-422 ikhanya kunye ne-digital interface ye-digital interface. Olu phawu lulwa ingxolo kwaye lugcina ukuhanjiswa kwedatha kuzinzile. Ukupheliswa kwentambo kunye nokuphazamiseka kweempawu kudlala indima enkulu ekusebenzeni kwenkqubo. I-RS-422 ivumela ukuya kuthi ga kwi-64 yoqhagamshelo, iyenza isebenziseke ngeendlela ezininzi.
Izinto eziluncedo kwi-Automation Applications
Kwi-automation, i-RS-422 isebenzisa ii-transceivers ze-0.5-ul zokudlulisa idatha ngokukhawuleza kunye nokunxibelelana okuthembekileyo. Ikwalungile ekulweni ingxolo, nto leyo engundoqo kwiindawo ezinengxolo. I-RS-422 lukhetho oluphezulu lokuthembeka kunye nokusebenza kakuhle kwi-automation, ethandwa ngabavelisi abaninzi kunye nabahlanganisi.
Izicelo eziqhelekileyo ze-RS-422
I-RS-422 isetyenziswa kumashishini amaninzi kuba ithembekile kwaye ibhetyebhetye. Uyilo oluxhomekeke kwisicelo lwenza ukuba lugqibelele kwiimfuno ezahlukeneyo. Iyakwazi ukuphatha ubude bekhebula ukuya kuthi ga kwi-1 km, elungele izixhobo ezikude.
Kwiimeko zoshishino, i-RS-422 ingundoqo kwiinkqubo ze-1 km ezifuna ukudluliselwa kwedatha ngokukhawuleza. Iireyithi zayo zokubonisa i-100 kbps zigqibelele kwidatha ekhawulezayo nethembekileyo. Ngaphezu koko, ukunyamezela kwayo ± 20% kunceda izixhobo zikwazi ukuthetha nangengxolo okanye ukuphazamiseka.
Izicelo zoShishino
I-RS-422 lolona khetho luphezulu kusetyenziso lwemizi-mveliso njengokwenza, ulawulo lwenkqubo, kunye ne-automation. Ukukwazi kwayo ukuphatha imigama emide kunye nedatha ekhawulezayo yenza ukuba ilungele izixhobo ezikude.
Usetyenziso oluzenzekelayo
Kwi-automation, i-RS-422 ilawula kwaye ibeke iliso kwizixhobo ezinjengeenjini, iimpompo kunye neevalvu. Ukuthembeka kwayo kunye nokuguquguquka kukulungele ukulawula ixesha langempela kunye nokubeka iliso.
| Isicelo | Inkcazo |
| I-Industrial Automation | I-RS-422 isetyenziselwa ukulawula kunye nokubeka iliso kwizixhobo zokusebenza kwi-industrial automation applications |
| Ulawulo Lwenkqubo | I-RS-422 isetyenziselwa ukulawula nokubeka iliso izixhobo kwizicelo zolawulo lwenkqubo |
| Ukuzenzekela | I-RS-422 isetyenziselwa ukulawula nokubeka iliso kwizixhobo zokusebenza ezizenzekelayo |
IiNgqwalasela zokuFakelo kunye noLondolozo
Xa useka izixhobo ze-RS-422, cinga malunga nobude bekhebula kunye nefuthe layo kwisantya sedatha. Intambo ende inokucothisa ukuhanjiswa kwedatha. Umzekelo, intambo eyi-500 m ixhasa kuphela i-200 kbps, esenokunganeli kuzo zonke iimfuno.
Ukukhetha ubude bekhebula obufanelekileyo ngundoqo wokudluliselwa kwedatha ethembekileyo. I-voltage ye-output yomqhubi kunye ne-input input voltage yomamkeli kufuneka ihambelane. Oku kuthintela ilahleko data okanye urhwaphilizo. Ngekhebula elichanekileyo kunye nokusekwa kwesixhobo, abasebenzisi banokuphepha iimpazamo kwaye baqinisekise unxibelelwano oluhle.
Ukufakwa kweCable
Ukufakela iintambo ngokuchanekileyo kubalulekile ukuphepha ukuphazamiseka kunye nokuqinisekisa umgangatho wedatha. Iintambo eziphothiweyo zezona zingcono zokunciphisa ingxolo kunye nokuphucula amandla omqondiso. Ukulandela la manyathelo kunceda kufakelo oluyimpumelelo nokugcina ukusebenza kuphezulu.
Uqwalaselo lweSixhobo
Ukuqwalasela izixhobo ngokufanelekileyo kukwabalulekile kulungiselelo lwe-RS-422. Abaqhubi kunye nabamkeli kufuneka bamiselwe ukuze basebenze kakuhle kunye. Ngokuqwalasela isantya sedatha kunye nobude bekhebula, abasebenzisi banokufumana ukusebenza kakuhle kwizixhobo zabo.
Ukuqukumbela
Umgangatho we-RS-422 yiprothokholi yonxibelelwano ethembekileyo neguquguqukayo. Isetyenziswa kakhulu kwimizi-mveliso kunye ne-automation fields. Inkxaso yayo kwiintambo ezinde, amanani aphezulu edatha, kunye nokhuseleko lwengxolo olungcono luyenza ibe lukhetho oluphezulu.
Njengoko ubuchwepheshe buhambela phambili, siza kubona uphuhliso olungakumbi kumgangatho weRS-485 kunye neendawo ezinxulumeneyo. Oku kuya kuzisa izibonelelo ezingakumbi kubasebenzisi.
Isishwankathelo seeNdlela eziPhambili
Eli nqaku ligubungele iinkcukacha zobuchwephesha be-RS-422, njengeempawu zayo zomqondiso kunye neemfuno zentambo. Iphinde yathetha nge-topology yenethiwekhi kunye nokusekwa kwesixhobo. Ngaphezu koko, ithelekisa i-RS-422 kunye ne-RS-232 kunye nemigangatho ye-RS-485.
Izibonelelo ze-RS-422 zokusetyenziswa kwemizi-mveliso kunye ne-automation zaphawulwa. Izicelo eziqhelekileyo kunye neengcebiso zokufakela zaxoxwa nazo.
Uphuhliso lwexesha elizayo
Ukujonga phambili, ukudibanisa i-rs-485 transceivers kunye nokuguqula i-impedance yegalelo kunokuphucula i-RS-422. Inokuxhasa ukuya kuthi ga kwi-32 ULS kwaye ibambe ii-nodes ezingaphezulu kwe-8x kune-RS-232.
Izixhobo ze-analog kunye nee-transceivers eziqhelekileyo ze-rs-485 / rs-422 ziyavela. Oku kuphakamisa ikamva eliqaqambileyo le-RS-422, ukuhlangabezana neemfuno zamacandelo oshishino kunye ne-automation.
I-PC yeRackmount
Embedded Computing
IiKhompyutha eziphathwayo zoShishino
Amacwecwe aMagingxigingxi
ILaptop eRhagedle
Ipaneli yePC yoShishino
I-Handheld Emagingxigingxi
I-Advantech Industrial PC
