Kutaurirana kweModbus: Kiyi yekuvaka Networks dzemaindasitiri dzisina musono
Kutaurirana kweModbus: Kiyi yekuvaka Networks dzemaindasitiri dzisina musono
Pfupiso
Modbus inzira inoshandiswa zvakanyanya mumaindasitiri, yakagadzirwa muna 1979 kuti ikwanise kutaurirana pakati pemidziyo inoshanda otomatiki. Modbus yakatanga kushandiswa senzira yekushandisa data kuburikidza ne serial layer, uye ikozvino inogona zvakare kuwedzerwa kuti ishandiswe kuburikidza ne serial, TCP/IP, uye User Datagram Protocol (UDP). Gwaro iri rinopa dudziro yakadzama yekushandiswa kwe protocol.
Chii chinonzi Modbus protocol?
Modbus inzira yekupindura chikumbiro kuburikidza nehukama hwetenzi nemuranda. Muhukama hwetenzi nemuranda, kutaurirana kunoitika nguva dzose mumapoka maviri (mudziyo unofanirwa kutanga chikumbiro wozomirira mhinduro), uye mudziyo unokumbira (mudziyo mukuru) ndiwo une basa rekutanga kutaurirana kwega kwega. Kazhinji, mudziyo wekutanga i-human-machine interface (HMI) kana monitoring and data acquisition (SCADA), nepo michina yechipiri iri sensors, programmable logic controllers ().plcs), kana kuti programmable automation controllers (PACs). Zviri mukati mezvikumbiro izvi nemhinduro, pamwe ne network layer inotumira mameseji aya, zvinotsanangurwa nezvikamu zvakasiyana zve protocol.
Ndezvipi zvishandiso zvinotsigira protocol yeModbus?
Nzira yeModbus inotsigirwa zvakanyanya nemidziyo, kusanganisira ma programmable logic controllers (PLCs), ma remote terminal units (RTUs), ma sensor, ma actuator, ma human-machine interfaces (HMIs), nedzimwe mhando dzakawanda dzemidziyo mu industrial automation uye ma industrial fields. Dhipatimendi reProcess Control. Modbus inoshandiswa zvakanyanya uye yave ndiyo nzira chaiyo yekushanda pamwe chete pakati pemidziyo inogadzirwa nevagadziri vakasiyana-siyana muminda yakaita sekugadzira, simba, kutakurwa, uye automation yekuvaka.
Modbus gateway chishandiso chinoshandura nzira yekutaurirana inoshandiswa ne industrial automation system network hubs. Chinotaurirana nemidziyo yakangwara, chinounganidza data kubva kumidziyo yakaderera uye chinoitumira kuModbus gateway, chinoisa kubatana ne network yepamusoro yekombuta, uye chinoita Modbus protocol nemakombiyuta enetwork.
Modhi yekutaurirana yeModbus
Nzira yekutaurirana yeModbus ine nzira nhatu huru dzekutaurirana:
lRTU (Chikamu cheRemote Terminal)
lKodhi yeAmerican Standard yeKuchinjana Ruzivo (ASCII)
lTCP/IP (Transmission Control Protocol/Internet Protocol)
MuModbus protocol, Modbus TCP neModbus RTU ndidzo nzira mbiri dzinonyanya kushandiswa pakutaurirana. Kunyangwe dzese dzakagadzirirwa kubatsira kuchinjana kwedata pakati pemidziyo, pane musiyano mukuru munzira dzavanoshandisa uye mamiriro ekushandisa.
Nzira yekutaurirana uye kumhanya
Modbus TCP inoshandisa TCP/IP protocol stack yekutumira data pamusoro penetwork, ichivimba ne network infrastructure dzakadai seEthernet kuti ikwanise kutumira data nekukurumidza uye kwakakura.
Kune rumwe rutivi, Modbus RTU inotumira data kuburikidza nemitsetse yakaita seRS-485 neRS-232, iyo ine kumhanya kunononoka kwekutumira data..
Modbus RTU inofukidza maframe edata muchimiro chebhinari chakamanikana, kusanganisira nzvimbo dzekero, makodhi ebasa, data, uye nzvimbo dzechecksum. Iyi fomati inotumirwa zvinobudirira muchimiro chebinary, zvichiita kuti ive yakakodzera kune maapplication ekudzora aripo panguva chaiyo kana emunharaunda, kunyanya munzvimbo dzisina network infrastructure iripo, senge nzvimbo dze automation dzeindasitiri, masisitimu akasungirirwa, masensa emagetsi, uye masisitimu madiki ekudzora.
Modbus TCP, kune rumwe rutivi, inoshandura byte yega yega yedata re binary kuita tambo ine manhamba maviri, iyo inozobatanidzwa pamwe chete uye inotumirwa muTCP code format. Nekuda kwekureruka kwayo, kuvimbika, uye kushanda kwayo zvakanyanya, inoshandiswa zvakanyanya mumasisitimu makuru e automation, nzvimbo dzedata, automation yekuvaka, uye industrial Internet of Things, izvo zvinoda daro refu rekutaurirana uye zvinodiwa zvakanyanya panguva chaiyo uye kugadzikana kwekutumira data.
Anzvimbo yekunyorera
Muindasitiri yekugadzira, Modbus inoshandiswa kubatanidza michina yakasiyana-siyana yekugadzira uye kuita kuti ionekwe uye itongwe panguva chaiyo; Mundima yesimba, inoshandiswa pakugadzirisa masisitimu emagetsi otomatiki, kusanganisira kugadzira magetsi, kutapurirana, uye kugovera; Muindasitiri yekufambisa, Modbus inoshandiswa pamasisitimu ekutumira masaini echitima mumaguta, kutarisa mamiriro emotokari, nezvimwewo; Mundima yekuzvigadzira otomatiki muzvivakwa, Modbus inoshandiswa paHVAC, mwenje, uye masisitimu ekuchengetedza muzvivakwa.
Nekuvandudzwa kwetekinoroji yeInternet yeindasitiri neInternet yeZvinhu, Modbus iri kuramba ichiwedzera hunyanzvi hwekuvandudza kuti ienderane nemamiriro ezvinhu akaomarara uye anochinja emaindasitiri. Semuenzaniso, Modbus/TCP iri kuva chiyero chikuru chekutaurirana kweEthernet yeindasitiri, uye zvishandiso zvepagedhi zvakavakirwa paModbus zvinogonesa zvishandiso zvechinyakare zveModbus kubatana zviri nyore kune network dzemazuva ano, zvichigonesa kuchengetedza data kubva mugore uye kuongororwa kwegore.
Muchidimbu, Modbus, senzira yekukurukurirana kwemaindasitiri yakakura uye inoshandiswa zvakanyanya, yakaona kufambira mberi kwetekinoroji yekuzvigadzira otomatiki kwemaindasitiri uye yakaisa hwaro hwakasimba hwehungwaru hwemaindasitiri mune ramangwana. Nekukura kuri kuramba kuchienderera mberi kwetekinoroji, Modbus icharamba ichiita basa rakakosha mukusimudzira hunyanzvi nekuchinja muchikamu chemaindasitiri.kana.