RS422 vs RS485: Liphapang tsa Bohlokoa ho Puisano ea Seriana
2024-12-05 10:41:08
Tafole ea likateng
Lefatšeng la kajeno, ho khetha maemo a nepahetseng a serial puisano ke senotlolo. RS422 le RS485 ke tse peli tsa bohlokoa. Ba sebelisa matšoao a fapaneng ho sebetsa hantle.
Ka bobeli RS422 le RS485 li thusa ho romella data maetong a malelele. Ba sebelisa lithapo tse sothehileng le lipontšo tse fapaneng. Sena se etsa hore phetiso ea data e tšepahale, esita le libakeng tse lerata. Li bohlokoa liindastering le likhoebong tse ngata.
Lintlha tsa bohlokoa
1.RS422 le RS485 ke litekanyetso tse hlahelletseng tsa serial tsa puisano.
2.Matshwao a fapaneng le mehala e sothehileng ya dithapo di matlafatsa tshepo ya puisano.
3.Maemo ana a bohlokoa bakeng sa phetiso ea data ea sebaka se selelele.
4.Ka bobeli RS422 le RS485 li ipabola ho fokotsa lerata le ho boloka botšepehi ba matšoao.
5.Tšebeliso ea tsona e akaretsa lits'ebetso tse fapaneng tsa indasteri le tsa khoebo.
Kakaretso ea RS422
RS422 ke tekanyetso e matla ea puisano ea serial. E fana ka phetiso ea data e potlakileng mme e sebetsa hantle libakeng tse telele. E na le litefiso tse tlase tsa liphoso. Ha re shebeng hore na ke eng e etsang hore RS422 e be e ikhethang, melemo ea eona, le hore na e sebelisoa hokae.
RS422 Standard le Litlhaloso
Tekanyetso ea RS422 e na le lintlha tse hlakileng tsa motlakase bakeng sa phetiso ea data. E sebelisa maemo a tlase a motlakase ho boloka matla. Transmitter ea RS422 e sebelisa matšoao a fapaneng ho loants'a lerata le ho fokotsa matšoao.
Mona ke lintlha tsa mantlha tsa motlakase bakeng sa RS422:
Maemo a fapaneng a motlakase: ± 2V ho ± 6V
Sekhahla se phahameng sa data: 10 Mbps
Bolelele ba cable: 1200 metres
Melemo ea RS422 ho Serial Communication
RS422 e ntle bakeng sa puisano e felletseng ea duplex. Sena se bolela hore e ka romella le ho amohela data ka nako e le 'ngoe. E nepahetse bakeng sa phapanyetsano ea data ea nako ea nnete. Ho feta moo, e sebetsa hantle ho loants'a lets'oao la mats'oao, kahoo e sebetsa hantle libakeng tse telele.
Likopo tsa RS422 indastering
RS422 e sebelisoa liindastering tse ngata hobane ea tšepahala ebile e sebetsa hantle. E sebelisoa ho:
Litsamaiso tsa taolo ea indasteri bakeng sa matšoao a nepahetseng
Tlhahiso e ikemetseng bakeng sa data e lumellanang
Mehala ea mehala e sebelisoang hole
Lisebelisoa tsa bongaka bakeng sa puisano e tsitsitseng ea data
Kakaretso ea RS485
Tekanyetso ea RS485 ke ntlafatso ho tloha RS422, e etselitsoeng tšebeliso ea indasteri le khoebo. E ts'ehetsa puisano ea halofo ea duplex, e etsa phapanyetsano ea data lipakeng tsa lisebelisoa ho netweke e le 'ngoe e sebetsang hantle.
RS485 Standard le Litlhaloso
RS485 e ka hokela lisebelisoa tse ka bang 32 beseng e le 'ngoe ka puisano ea marotholi a mangata. E sebelisa matšoao a fapaneng ho fokotsa litaba ka phetiso ea data e hole. Tekanyetso e kenyelletsa lintlha tse mabapi le motlakase o sebetsang, maemo a mats'oao le nako ho netefatsa hore lisebelisoa li sebetsa 'moho hantle.
Lintlha tsa Bohlokoa le Melemo ea RS485
RS485 e hlahella bakeng sa puisano ea eona ea halofo ea duplex, e lumellang phetiso ea data ea litsela tse peli holim'a lithapo tse le 'ngoe. Sena se nolofatsa cabling ea marang-rang le ho fokotsa litšenyehelo. E boetse e fana ka tšireletso e matla ea lerata la lerata, ho netefatsa botšepehi ba data libakeng tse lerata. Sena se bohlokoa maemong a indasteri moo tšitiso e atileng.
Maemo a Tloaelehileng a Tšebeliso ea RS485
RS485 e tumme litsamaisong tse hlokang puisano e tšepahalang libakeng tse telele. E sebelisoa ho aha li-automation, taolo ea HVAC, le marang-rang a indasteri. Bokhoni ba eona ba ho ts'ehetsa lisebelisoa tse ngata moleng o le mong bo etsa hore ho be bonolo ho atolosa litsamaiso ntle le liphetoho tse kholo.
E boetse e bohlokoa lits'ebetsong tsa CCTV le metering e hole. Mona, botšepehi ba data le tahlehelo e fokolang ea matšoao ke tsa bohlokoa.
Liphapang tse ka Sehloohong Pakeng tsa RS422 le RS485
Ho bohlokoa ho tseba phapang lipakeng tsa RS422 le RS485 bakeng sa puisano ea serial. Liphapang tsena li hlaha ho setupong sa bona, hore na data e tsamaea joang, boleng ba matšoao, ho hanyetsa lerata, le hore na ba ka romella data hole hakae le kapele.
Topology ea puisano: Point-to-Point vs Multi-Drop
RS422 e etselitsoe puisano ea ntlha-to-point. E molemo ka ho fetisisa bakeng sa lihokelo tse tobileng pakeng tsa lisebelisoa tse peli. RS485, leha ho le joalo, ke ea puisano ea marotholi a mangata. E lumella lisebelisoa tse ngata ho sebelisa bese e tšoanang, e loketseng marang-rang a maholo.
Tataiso ea Phetiso ea Lintlha: Full-Duplex vs Half-Duplex
RS422 e ts'ehetsa puisano e felletseng ea duplex. Sena se bolela hore e ka romella le ho amohela data ka nako e le 'ngoe. RS485 e ka sebetsa ka bobeli-full-duplex RS485 le half-duplex RS485 mekhoa. Sena se etsa hore e be bonolo bakeng sa litlhoko tse fapaneng.
Botšepehi ba Letšoao le Tšireletso ea Lerata
Ka bobeli RS422 le RS485 li na le ts'ireletso e matla ea lerata ka lebaka la matšoao a fapaneng. Empa, tlhophiso ea marotholi a mangata ea RS485 e kanna ea tobana le lerata le fetang la RS422's point-to-point. Ena ke ntho eo u ka nahanang ka eona libakeng tse lerata.
Bohole le Bokgoni ba Lebelo
RS422 le RS485 li ka romella data ka potlako libakeng tse khutšoane. Empa, li fapane ka libaka tse telele. RS485 e sebetsa betere, ka meeli e fokolang ea sebaka. E ntle bakeng sa lithapo tse telele le litlhoko tsa data tse potlakileng.
RS422 vs RS485: Ke Efe eo U ka e Khethang?
Ho khetha pakeng tsa RS422 le RS485 ho ka ba thata. E itšetlehile ka lintlha tse 'maloa tsa bohlokoa le seo indasteri ea hau e se hlokang. Ho tseba se bohlokoa haholo ho bohlokoa ho etsa khetho e nepahetseng.
Lintlha Tseo U Lokelang ho li Nahana Ha U Khetha Pakeng tsa RS422 le RS485
Ha u khetha pakeng tsa RS422 le RS485, nahana ka lintho tse 'maloa. Sheba sebaka sa phetiso ea data, liprothokholo tsa puisano tseo u li hlokang, maemo a lerata, le ho seta marang-rang. RS422 e ntle bakeng sa puisano ea ntlha-to-point libakeng tse telele. RS485, ka lehlakoreng le leng, e molemo bakeng sa ho hokahanya lisebelisoa tse ngata marang-rang a le mong.
Litlhahiso tse Khethehileng tsa Indasteri (Industrial Automation, SCADA, joalo-joalo)
Likarolong tse kang li-automation tsa indasteri le litsamaiso tsa SCADA, litekanyetso ka bobeli li na le melemo ea tsona. RS422 e holimo-limo bakeng sa libaka tseo ho boloka matšoao a hloekile ho leng bohlokoa. E sebelisa lets'oao le matla la phapang ea matla a tlase. RS485, leha ho le joalo, ke sebaka sa ho seta ka lisebelisoa tse ngata, se nolofalletsang ho beha leihlo le ho laola hole.
Mokhoa oa ho khetha ho ipapisitse le Litlhoko tsa Kopo
Sebaka sa Phetiso ea Lintlha: RS422 e ka ea hole ho feta RS485.
Melao ea Khokahano: Lekola hore na li lumellana le litsamaiso le liprothokholo tsa hau tsa hajoale.
Ho itšireletsa ha Lerata: RS422 e molemo ho loants'a lerata ka lebaka la matšoao a eona a fapaneng.
Moralo oa Marang-rang: RS485 e ntle bakeng sa marang-rang a nang le lisebelisoa tse ngata le li-setups tse feto-fetohang.
Ka ho sheba lintlha tsena ka hloko, u ka khetha khetho e ntle ka ho fetisisa bakeng sa litlhoko tsa hau.
| Litekanyetso | RS422 | RS485 |
| Bohole ba Phetiso ea Lintlha | Libaka tse telele li tšehetsoa | Libaka tse itekanetseng |
| Topology ea puisano | Ntlha-ho-ntlha | Puisano ea marotholi a mangata |
| Ho itšireletsa lerata | Phahameng (phapang letshwao) | E itekanetseng |
| Tšebeliso ea indasteri | Lisebelisoa tsa indasteri, litsamaiso tsa SCADA | Boiketsetso ba indasteri, litsamaiso tsa SCADA, ho lekola hole |
Likopo tsa 'Nete tsa Lefatše le Lithuto tsa Litaba RS422 le RS485 li bohlokoa maemong a mangata a indasteri. Ba netefatsa puisano e sebetsang hantle le e tšepahalang. Sena se bohlokoa bakeng sa lintho tse kang liindasteri tsa liindasteri, litsamaiso tsa SCADA, le litsamaiso tsa ho fumana lintlha.
RS422 le RS485 ho Industrial Automation
Boiketsetso ba indasteri bo hloka puisano e nepahetseng lipakeng tsa likarolo tsa eona. RS422 le RS485 etsa bonnete ba hore data e fetisoa ka botšepehi. Sena se bohlokoa bakeng sa ts'ebetso e bonolo ea li-sensor le li-actuator.
Ba tšehetsa liprothokholo tsa puisano tsa fieldbus. Sena se bolela hore ba khona ho sebetsana le puisano ea nako ea sebele. Sena ke senotlolo sa ho boloka sistimi e sebetsa hantle le ho fokotsa nako ea ho theoha.
RS485 ho SCADA Systems le Remote Monitoring
Sistimi ea SCADA e sebelisa RS485 bakeng sa ho fumana le ho beha leihlo data hole. E ntle bakeng sa SCADA hobane e khona ho sebetsana le li-node tse ngata marang-rang a le mong. Sena se etsa hore puisano ea nako ea sebele e khonehe.
RS485 e ntlafatsa ts'ebetso le ts'epahalo ea lits'ebetso tsa ho lekola tse hole. E netefatsa hore data e fumanoa le ho hlahlojoa kapele. Sena se bohlokoa bakeng sa ho araba lipotso leha e le life hang-hang.
Tšebeliso ea RS422 le RS485 ho Mecha ea Phano ea Boitsebiso
Sistimi ea ho fumana data e hloka data e tšepahalang le e tsitsitseng. RS422 le RS485 li sebelisoa ho hapa le ho romella data ho tsoa ho li-sensor tsa indasteri. Moqapi oa bona o matla, ho bolelang hore tahlehelo ea matšoao e fokola.
Sena se bohlokoa haholo libakeng tseo ho nepahala ho leng bohlokoa. Mekhoa ea puisano ea Fieldbus le eona e thusa. Ba etsa hore litsamaiso tsena li atlehe haholoanyane ka ho lumella ho fumana le ho hlahloba data ka nako ea sebele.
| Sebelisa Taba | RS422 | RS485 |
| Industrial Automation | Puisano e ka tšeptjoang ea ntlha-to-point, taolo e nepahetseng ea lisebelisoa | E ts'ehetsa marang-rang a marotholi a mangata, tšebelisano e pharaletseng |
| Sistimi ea SCADA | E sebetsa bakeng sa litsamaiso tse nyane, lits'ebetso tsa taolo tse bohareng | Tlhokomelo e sebetsang hantle ea hole, e sebetsana le li-node tse ngata hantle |
| Mekhoa ea ho Fumana Boitsebiso | Botšepehi bo phahameng ba data ho litlhophiso tsa ntlha-to-point | Scalable data acquisition, e loketse bakeng sa ho kenya lisebelisoa tse kholo |
Papiso ea RS422 le RS485 le Maemo a Mang a Puisano
RS422 le RS485 ke tsa bohlokoa maemong a indasteri. Leha ho le joalo, ho li bapisa le RS232 le Ethernet ho bohlokoa. Sena se re thusa ho bona litšobotsi tsa bona tse ikhethang le ho khetha e nepahetseng bakeng sa litlhoko tsa rona.
RS232 vs RS422 vs RS485: Ke Efe e Molemo ka ho Fetisisa?
RS232 e tsejoa ka mokhoa o bonolo le bonolo oa tšebeliso. Ka lehlakoreng le leng, RS422 le RS485 li khona ho sebetsana le sebaka se selelele le lebelo le potlakileng. Li molemo bakeng sa mesebetsi e rarahaneng.
| Sebopeho | RS232 | RS422 | RS485 |
| Tšireletso ea Line ea data | Motheo | E itekanetseng | Phahameng |
| Botšepehi ba Puisano | E itekanetseng | Phahameng | Phahameng |
| Sebaka | Ho fihla ho limithara tse 50 | Ho fihla ho limithara tse 4,000 | Ho fihla ho limithara tse 4,000 |
| Network Topology | Ntlha-ho-Ntho | Ntlha-ho-Ntho | Marotholi a mangata |
| Sekhahla sa Boitsebiso bo Phahameng | 20 kbps | 10 Mbps | 10 Mbps |
RS232 e sebetsa hantle bakeng sa libaka tse khutšoane le likhokahano tse bonolo. Empa, RS422 le RS485 li molemo bakeng sa maeto a malelele le li-setups tse rarahaneng. Li fana ka ts'epo le ts'ireletso e eketsehileng bakeng sa mela ea data.
Qetello
Ha re phethela chebahalo ea rona e qaqileng, liphapang tsa bohlokoa lipakeng tsa RS422 le RS485 li hlakile. Likhokahano tsena tsa serial li na le melemo le ts'ebeliso e ikhethang, e leng se etsang hore e be tsa bohlokoa ho liprothokholo tsa indasteri. Ho tseba lintlha tsa bona tsa motlakase ho eketsa katleho ea puisano le ho ts'epahala ha lisebelisoa bakeng sa mesebetsi e rarahaneng.
RS422 e khanya ka setupo sa eona se felletseng sa duplex le sebaka se selelele. E nepahetse bakeng sa lipuisano tse nepahetseng tsa ntlha-to-ntlha. Ka lehlakoreng le leng, moralo le tšehetso ea RS485 ea li-node tse ngata li ntle bakeng sa litsamaiso tse hlokang likhokahano tse tenyetsehang le ts'ebetso e tšepahalang libakeng tse telele.
Ka bokhutšoanyane, ho khetha pakeng tsa RS422 vs RS485 ho itšetlehile ka litlhoko tsa morero oa hau. Hore na ke bakeng sa liindasteri rack PC, moetsi oa lik'homphieutha tsa indasteri, kapa moetsi oa komporo e kentsoeng, ho sebelisa maemo ana a serial segokanyimmediamentsi sa sebolokigolo ho netefatsa tshebetso e holimo le hardware tšepahala. Ho feta moo, tsamaiso e joalo PC ea indasteri bakeng sa pono ea mochini kapa PC e nyane e thata itšetlehile ka mekhoa e metle ea puisano ho boloka ts'ebetso e tsitsitseng.
Ha liprothokholo tsa indasteri li ntse li tsoela pele, RS422 le RS485 li tla lula li bapala karolo ea bohlokoa puisanong e bonolo le e sebetsang lits'ebetsong tsa kajeno.
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