Imiyalo yesithumeli sebhasi
I-485 iwuhlobo lwebhasi le-serial elisetshenziswa kabanzi kwezokuxhumana zezimboni.Ukuxhumana kwe-485 kudinga kuphela izintambo ezimbili (umugqa A, umugqa B), ukudluliswa kwebanga elide kuyanconywa ukusebenzisa ipheya esontiwe evikelekile.Ngokwethiyori, ibanga eliphezulu lokudlulisela elingu-485 lingamafidi angu-4000 kanti izinga eliphezulu lokudlulisela ngu-10Mb/s.Ubude bepheya esontekile ebhalansile buyalingana ngokuphambene nezinga lokudlulisela, elingaphansi kuka-100kb/s ukuze kufinyelelwe ibanga eliphezulu lokudlulisela.Izinga eliphezulu kakhulu lokudlulisela lingafinyelelwa kuphela ebangeni elifushane kakhulu.Ngokuvamile, izinga eliphezulu lokudlulisela elitholwe ocingweni olusontekile lwamamitha ayi-100 lingu-1Mb/s kuphela.
Emikhiqizweni yokuxhumana engama-485, ibanga lokudlulisela lincike kakhulu entanjeni yokudlulisela esetshenzisiwe, ngokuvamile uma ipheya esontekile evikelekile, ibanga lokudlulisela liyoba kude kakhulu.
Kukhona inkosi eyodwa kuphela ebhasini le-485, kodwa izigqila eziningi zivunyelwe.Inkosi ingakwazi ukuxhumana nanoma yisiphi isigqila, kodwa ayikwazi ukuxhumana phakathi kwezigqila.Ibanga lokuxhumana lingaphansi kwezinga le-485, elihlobene nempahla yocingo yokuxhumana esetshenzisiwe, imvelo yendlela yokuxhumana, izinga lokuxhumana (isilinganiso se-baud) kanye nenani lezigqila ezixhunyiwe.Uma ibanga lokuxhumana likude, i-terminal resistance ye-120-ohm iyadingeka ukuze kuthuthukiswe ikhwalithi yokuxhumana nokuzinza.Ukumelana kwe-120 ohms kuvame ukuxhunywa ekuqaleni nasekupheleni.
Izindlela ezixhunyiwe ze-transmitter yebhasi kanye nekhabhinethi yokulawula ibhasi imi kanje:
Umfanekiso 1: Indlela yokuxhuma i-Bus Transmitter yokulawula ikhabhinethi yokuxhuma
Inzwa: igesi enobuthi i-electrochemical, igesi evuthayo inamandla okuvutha, i-carbon dioxide iyi-infrared
Isikhathi sokuphendula: ≤40s
Imodi yokusebenza: umsebenzi oqhubekayo
I-voltage esebenzayo: DC24V
Imodi yokuphuma: RS485
Ibanga lokushisa: -20 ℃ ~ 50 ℃
Ibanga lomswakamo: 10 ~ 95% RH [akukho ukufingqa]
Inombolo yesitifiketi sokuvikela ukuqhuma.: CE15.1202
Uphawu lokuvikela ukuqhuma: Exd II CT6
Ukufakwa: kufakwe odongeni (inothi: bheka umdwebo wokufaka)
Isakhiwo sokubukeka: igobolondo le-transmitter lamukela igobolondo le-aluminium ye-die-cast elakhiwe ngesakhiwo esingashi, idizayini ye-groove yekhava engaphezulu ilungele ukukhiya igobolondo, ingaphambili lenzwa liklanywe ngesakhiwo esibheke phansi ukuze kuqinisekiswe ukuthintana okuhle kakhulu phakathi kwenzwa. kanye negesi, nendawo yokungena ithatha ijoyinti elingaqhumi lingangeni manzi.
Ubukhulu bangaphandle: 150mm×190mm×75mm
Isisindo:≤1.5kg
Ithebula1:Ipharamitha yegesi evamile
| Igesi | Igama likagesi | Inkomba yobuchwepheshe | ||
| Ibanga lokulinganisa | Isixazululo | Iphoyinti le-alamu | ||
| CO | I-carbon monoxide | 0-1000pm | 1 ppm | 50ppm |
| H2S | I-Hydrogen sulfide | 0-100ppm | 1 ppm | 10ppm |
| EX | Igesi evuthayo | 0-100%LEL | 1%LEL | 25%LEL |
| O2 | Umoya-mpilo | 0-30%vol | 0.1%vol | Phansi 18%vol Iphezulu 23%vol |
| H2 | I-hydrogen | 0-1000pm | 1 ppm | 35ppm |
| CL2 | I-Chlorine | 0-20ppm | 1 ppm | 2 ppm |
| NO | I-nitric oxide | 0-250pm | 1 ppm | 35ppm |
| SO2 | Sulfur dioxide | 0-100ppm | 1 ppm | 5 ppm |
| O3 | I-ozone | 0-50ppm | 1 ppm | 2 ppm |
| NO2 | I-nitrogen dioxide | 0-20ppm | 1 ppm | 5 ppm |
| NH3 | I-Amoniya | 0-200ppm | 1 ppm | 35ppm |
| CO2 | I-Carbon dioxide | 0-5%vol | 0.01%vol | 0.20%vol |
Qaphela: ithebula 1 elingenhla liyipharamitha evamile yegesi kuphela.Sicela uxhumane nomkhiqizi ngezidingo ezikhethekile zegesi kanye nobubanzi.
I-Bus Transmitter System iwuhlelo lokuqapha inethiwekhi (igesi) oluhlanganisa isidlulisi segesi kanye nokudluliselwa kwesignali engu-485 futhi itholwa ngokuqondile futhi ilawulwa yikhompyutha ebamba i-PC noma iKhabhinethi yokulawula.Ngokuphuma kwe-relay, i-relay izovala uma ukugxiliswa kwegesi kububanzi be-alamu.Uhlelo lokudlulisa amabhasi lwakhiwe ngokuhambisana nezidingo zokuklama zenethiwekhi yamabhasi angama-485, futhi lusetshenziswa ekuxhumaneni okujwayelekile kwenethiwekhi yamabhasi angama-485.
Umfanekiso 2: Umdwebo wangaphakathi wesithumeli
Isidingo sezintambo zohlelo lokudlulisa amabhasi siyefana nesebhasi elijwayelekile elingu-485.Kodwa-ke, iphinde ihlanganise izici ezizenzele zona, njenge:
1. Ingaphakathi lihlanganiswe nokumelana ne-120 ohm offset, okukhethwe ngokushintsha.
2. Ngokuvamile, ukulimala kwamanye ama-node ngeke kuthinte ukusebenza okuvamile kwesithumeli sebhasi.Kodwa-ke, kufanele kuphawulwe ukuthi uma izingxenye eziyinhloko ngaphakathi kwe-node zilimele kakhulu, wonke umthumeli webhasi angase akhubazeke.Futhi Sicela uxhumane nomkhiqizi ukuze uthole izixazululo ezithile.
3. Umsebenzi wesistimu uzinzile, usekela amahora angama-24 omsebenzi oqhubekayo.
4. Isibonelelo esiphezulu sethiyori singama-node angama-255.
Qaphela: ulayini wesignali awusekeli ipulaki eshisayo.Ukusetshenziswa okunconyiwe: qala ngokuxhuma ulayini wesiginali yebhasi engu-485, bese unika indawo yokusebenzela amandla ukuze isebenze.
Indlela yokukhweza efakwe odongeni: dweba izimbobo odongeni, sebenzisa amabhawodi wokunweba angu-8mm×100mm, lungisa amabhawodi wokunweba odongeni, faka isidlulisi, bese usilungisa ngamantongomane, i-elastic pad kanye nephedi eliyisicaba, njengoba kukhonjisiwe kumfanekiso wesi-3.
Ngemuva kokuthi isidlulisi sesilungisiwe, susa ikhava engaphezulu bese wethula ikhebula endaweni yokungena.Bheka umdwebo wesakhiwo wamatheminali okuxhuma ane-polarity ephozithivu nenegethivu (Uxhumano lohlobo lwe-Ex), bese ukhiya ilunga elingangeni manzi, uqinise ikhava engaphezulu ngemva kokuhlola.
Qaphela: inzwa kufanele ibe phansi uma ifakiwe
Umfanekiso 3:Ubukhulu bangaphandle kanye ne-bitmap yembobo ekhuphukayo yesidluliseli
1. Kunconywa izintambo ezimbili zentambo yamandla nesiginali.Ilayini yamandla isebenzisa i-PVVP, futhi ulayini wesiginali kufanele usebenzise ipheya esontekile evikelekile eyamukelwa umhlaba wonke (i-RVSP twisted pair).Ukusetshenziswa kwezintambo ezisontekile ezivikelekile kusiza ukunciphisa nokuqeda amandla asabalalisiwe akhiqizwa phakathi kwemigqa emibili yokuxhumana engama-485 kanye nokuphazanyiswa kwemodi evamile okukhiqizwa eduze kwemigqa yokuxhumana.Ibanga lokudlulisela elingu-485 lihlukile ngokuya ngocingo olukhethiwe, futhi ngokuvamile alifinyeleli ebangeni eliphezulu lokudluliswa kwethiyori.Kunconywa ukuthi ungasebenzisi ikhebula elingumgogodla elingu-4, amandla nesiginali usebenzisa ikhebula elifanayo.Umdwebo 4 ulayini wesignali, futhi umdwebo 5 ulayini wamandla.
Umfanekiso 4: Ulayini Wesiginali
Umfanekiso 5: Intambo yamandla
2. Intambo yokudlulisa ekwakhiweni ukugwema ukuvela kwe-loop, okungukuthi, ukwakheka kwekhoyili ye-multi-loop.
3. Lapho ukwakhiwa kufanele kuhlukaniswe ngeshubhu, ngangokunokwenzeka kude nocingo oluphezulu lwe-voltage, ukugwema eduze nogesi onamandla, amasignali anamandla kazibuthe.
485 ibhasi lokusebenzisa isakhiwo sesandla esandleni, ukususa ngokuqinile uxhumano lwenkanyezi nokuxhumeka kwe-bifurcation.Uxhumano lwenkanyezi nokuxhumeka okuphindwe kabili kuzokhiqiza isignali yokubonisa, ngaleyo ndlela kuthinte ukuxhumana kwe-485.Isihlangu sixhunywe ku-transmitter house.Umdwebo womugqa uboniswe esithombeni 6.
Umfanekiso 6: Ishadi lomugqa elinemininingwane
Umdwebo wezintambo olungile ukhonjiswe kumfanekiso wesi-7 futhi umdwebo wezintambo ongalungile ukhonjiswe kumfanekiso wesi-8.
Umfanekiso 7: Umdwebo wezintambo olungile
Umfanekiso 8: Umdwebo wezintambo ongalungile
Uma ibanga lide kakhulu, isiphindaphinda siyadingeka, futhi indlela yokuxhuma iphinda ikhonjiswe kumfanekiso 9. Izintambo zokuphakelwa kwamandla aziboniswa.
Umfanekiso 9:Indlela yokuxhumana ephindaphindayo
4. Ngemva kokuba izintambo seziqediwe, xhuma izingxenye zama-transmitter kuqala, unqamule intambo yamandla nolayini wesignali, bese uxhuma ekugcineni kumthumeli, njengoba kuboniswe kumfanekiso 2. Sebenzisa i-multimeter ukuze uhlole ukuthi kukhona yini umjikelezo omfushane phakathi kwamasignali. kanye nemigqa yamandla.Inani lokumelana phakathi komugqa wesiginali A no-B limayelana nama-50-70 ohms.Sicela uhlole ukuthi umsingathi angakwazi yini ukuxhumana nesithumeli ngasinye bese uxhuma izingxenye ezisele ukuze zihlolwe.Setha iswishi yokugcina yesidluliseli exhunywe kukho njengamanje,Enye iswishi yesidluliseli isethwe ku-1.
Qaphela: ukuphela kokuphela okokuxhunywa kwezintambo zebhasi kuphela.Enye indlela yokuxhuma ucingo ayivunyelwe.
Uma kunezicucu eziningi zokudlulisa kanye nebanga elikude, sicela unake okungezansi:
Uma wonke ama-node ehluleka ukuthola idatha, futhi ukukhanya kwenkomba ku-transmitter kungasebenzi, kubonisa ukuthi ukunikezwa kwamandla akukwazi ukuhlinzeka okwamanje okwanele, futhi okunye ukunikezwa kwamandla okushintshwa kuyadingeka, ngakho-ke kunconywa ukusebenzisa amandla amakhulu. .Esimeni esiphakathi kokushintshwa kwamandla okubili, nqamula i-24V+, 24V- exhumekile ukuze ugweme ukuphazamiseka phakathi kokushintsha kwamandla okubili.
B.Uma ukulahlekelwa kwe-node kubi kakhulu, kungenxa yokuthi ibanga lokuxhumana lide kakhulu, idatha yebhasi ayizinzile, idinga ukusebenzisa i-repeater ukwandisa ibanga lokuxhumana.
5. Isidluliseli socingo lwebhasi sinomyalezo owodwa kuphela ovulekile ovulekile.Lapho ukugxila kwegesi kudlula indawo ye-alamu esethiwe ukudluliselwa kuyavalwa, ngaphansi kwephoyinti le-alamu, i-relay izonqamula umsebenzisi ukwenza izintambo ngokuvumelana nezidingo.Uma ufuna ukulawula isiphephetha-moya noma ezinye izinto zokusebenza zangaphandle, sicela uxhume okokusebenza kwangaphandle kanye nesixhumi esibonakalayo esidluliselwe kuchungechunge kumandla afanele (njengoba kuboniswe kumfanekiso 10 umdwebo wezintambo we-relay)
Figure 10 umdwebo wezintambo we-relay
Izinkinga nezisombululo ezihlobene nesistimu yesithumeli sebhasi ye-RS485
1. Amanye amatheminali awanayo idatha: ngokuvamile i-node ayisebenzi ngenxa yesizathu esithile sangaphandle, indlela yokuhlola ukuthi ukukhanya kwesikhombi ebhodini lesifunda kuyakhanya.Uma ukukhanya kwenkomba kungakhanyi, i-node ingashajwa ngokwehlukana.
2. Isibani senkomba sibaneka ngokujwayelekile, kodwa ayikho idatha.Kuyadingeka ukuhlola ukuthi izintambo A no-B zixhumeke ngokujwayelekile yini nokuthi zixhumeke ngokuhlehla yini.Nqamula amandla ale nodi bese uxhuma ikhebula ledatha futhi ukuze ubone ukuthi ungayithola yini le datha yenodi.Inothi elikhethekile: ungaxhumeki intambo yamandla embotsheni yekhebula ledatha, izolimaza kakhulu idivayisi ye-RS485.
3. Kudingeka uxhumano lwetheminali.Uma izintambo zebhasi ezingu-485 zinde kakhulu (ngaphezu kwamamitha angu-100), kuyanconywa ukuthi uxhume ekugcineni.Uxhumano lokugcina luvame ukudingeka ekupheleni kuka-RS485, njengoba kuboniswe emfanekisweni 2.Uma izintambo zebhasi zizinde kakhulu, ophindayo. ukuxhuma kungasetshenziswa ukunweba ibanga lokudlulisela.(qaphela: Uma kusetshenziswa isiphindaphindi se-RS485, asikho isidingo sokuxhuma kwetheminali endaweni ephindayo futhi ukuhlanganisa kwangaphakathi kuqediwe.
4. Ngaphandle kwezinkinga ezingenhla, uma ukukhanya kwenkomba kukhanya ngokujwayelekile (1 flash ngomzuzwana) futhi ukuxhumana kwehluleka, i-node ingahlulelwa ngokulimala (inqobo nje uma ukuxhumana komugqa kuyinto evamile).Uma inombolo enkulu yama-node ingakwazi ukuxhumana, sicela kuqala iqinisekisa ukuthi izintambo zamandla nezokuxhumana zilungile, bese uthintana nosekelo olufanele lwezobuchwepheshe.
Isikhathi sewaranti yethuluzi lokuhlola igesi elakhiwe inkampani yethu yizinyanga eziyi-12, eziqala kusukela ngedethi yokulethwa.Enqubweni yokusebenzisa, umsebenzisi kufanele athobele imiyalelo yokusebenza, ngenxa yokusebenzisa okungafanele, noma izimo zokusebenza ezibangele ithuluzi. umonakalo, awuhlanganisiwe kuwaranti.
Sicela ufunde imiyalelo ngokucophelela ngaphambi kokusebenzisa ithuluzi.
Ukusebenza kwethuluzi kufanele kulandele imithetho echazwe emiyalweni.
Ukugcinwa kwamathuluzi kanye nokushintshwa kwezingxenye kuzosingathwa inkampani yethu noma iziteshi zokunakekela zendawo.
Uma umsebenzisi engayilandeli imiyalelo engenhla, qala noma shintsha izingxenye, ukwethembeka kwethuluzi kufanele kube isibopho somsebenzisi.
Ukusetshenziswa kwethuluzi kuzophinde kuhambisane nemithetho neziqondiso zeziphathimandla ezifanele zasekhaya kanye nokuphathwa kwamathuluzi efekthri.
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