Dab tsi yog qhov sib txawv ntawm modbus thiab profinet?

1, tsim cov tswv yim thiab kev thov cov xwm txheej
Modbus, txij li nws txoj kev loj hlob los ntawm Schneider Electric nyob rau xyoo 1979, nws tau dhau los ua ib qho ntawm cov qauv nrov tshaj plaws hauv kev lag luam sib txuas lus. Nws yog lub npe hu rau nws yooj yim thiab ua tau zoo, muab txoj kev sib txuas lus sib txuas lus rau cov khoom siv sib txawv. Modbus tsuas yog siv rau cov ntaub ntawv sib pauv ntawm cov tswj cov cav (plcs), thiab lwm yam khoom siv, thiab yog lwm yam khoom siv, thiab yog lwm yam kev tsim khoom, thiab siv cov khoom siv tshuab. Ua ib tus tswv-nplua tu qauv, modbus suple kev hloov pauv: modbus tcp / chaw deb tcp / ip, ethernet kev sib txuas lus thiab kev sib txuas lus, feem.
Nyob rau hauv kev sib piv, proplinet yog kev ua tau zoo, tiag-lub sij hawm muaj Ethernet muaj Ethernet Ether tau tsim thiab txhawb los ntawm German automation Technology Association (Profibus nutzeroorganization). Nws yog tsuas yog siv nyob rau hauv lub teb kev lag luam Automation thiab kev tswj cov txheej txheem, txhawb ntau yam ethernet, thiab tuaj yeem ua tau raws li cov kev xav tau sib txawv. Profinet tsis tsuas yog sib piv nrog cov qauv ethernet, tab sis kuj tseem tab tom muab cov npe luam tawm los ntawm cov neeg muaj nuj nqi, ua tiav txoj haujlwm ntawm "ib qho network mus rau qhov kawg".
2, Cov yam ntxwv ua tau zoo thiab cov ntaub ntawv kis
Muaj ntau qhov sib txawv ntawm kev ua tau zoo ntawm modbus thiab profinet. Tus nqi sib kis ntawm modbus RTU feem ntau yog tsawg, ua rau nws haum rau kev siv nrog cov ntaub ntawv me me. Txawm hais tias Modbus TCP / IP tuaj yeem txhawb nqa ntev-sib txuas lus thiab qib siab dua kis tus nqi, nws yog tsis muaj zog nyob rau hauv cov nqe lus ntawm kev ua tau zoo tiag tiag. Tshwj xeeb tshaj yog nyob rau hauv TCP / ib puag ncig, modbus yog qhov yooj yim rau network tawm tsam thiab tsis muaj kev ruaj ntseg.
Profinet sawv tawm rau nws qhov kev ua tau zoo, nrawm, thiab cov kev sib txuas lus tiag tiag. Nws tuaj yeem ua tiav cov ntaub ntawv tiag tiag cov ntaub ntawv thiab yog hom ntawm cov ethernet tiag tiag. Profinet muab ntau yam kev pabcuam kis tau zoo, xws li kev sib txuas lus hauv lub sijhawm, thiab muaj cov ntaub ntawv sib txuas lus zoo rau kev sib txuas lus thiab tswj cov khoom siv synchronization ntawm ntau yam khoom siv. Ib qho ntxiv, Profinet tseem txhawb kev sib txuas lus sib txawv xws li tshaj tawm, ntau yam, thiab tsis muaj raws li cov ntaub ntawv raug thiab raug kom meej.
3, Network Topology thiab sib raug zoo
Nyob rau hauv cov nqe lus ntawm network topology, modbus thiab profinet kuj yuav ua pov thawj cov yam ntxwv sib txawv. Modbus tsuas yog siv rau kev sib txuas lus, thaum profinet yog ib eternet yog eternet raws li kev txhawb nqa automation network uas txhawb ntau yam cov ntsiab lus, caij tsheb npav, thiab mesh. Qhov kev hloov tau zoo no ua rau tau txais txiaj ntsig zoo rau kev siv rau hauv ntau qhov rooj sib tham, sib tham sib txawv thiab kev sib txuas ua haujlwm.
Nyob rau hauv cov nqe lus ntawm kev sib raug zoo, modbus, raws li qhib raws tu qauv, tuaj yeem siv tau dawb los ntawm txhua yam khoom siv ntaus ntawv, ua rau nws siv dav. Txawm li cas los xij, qhov no tseem ua rau muaj peev xwm cuam tshuam nrog cov teeb meem cuam tshuam ntawm cov khoom siv los ntawm cov tuam ntxhab sib txawv. Profinet, ntawm qhov tod tes, ua kom muaj kev cuam tshuam nrog cov txheej txheem sib txuas lus, xws li ethodet / etecet / ip, ntxiv txo qhov nyuaj ntawm kev sib xyaw ua ke ntawm cov txheej txheem kev sib xyaw.
4, kev nyab xeeb thiab kuaj mob ua haujlwm
Nyob rau hauv cov nqe lus ntawm kev ruaj ntseg, muaj ntau qhov sib txawv ntawm modbus thiab profinet. Modbus raws txoj cai tau pib tsim yam tsis xav txog cov teeb meem kev ruaj ntseg kev ruaj ntseg, ua rau nws muaj kev cuam tshuam rau network tawm tsam hauv TCP / IP chaw ib puag ncig. Profinet muab kev ruaj ntseg ntau dua, suav nrog kev ua haujlwm encryption thiab kev txheeb xyuas cov kev lees paub, los tiv thaiv kev tsis pub lwm tus paub thiab kev ncaj ncees ntawm lub system. Tsis tas li ntawd, profinet tseem muab kev tswj hwm kev siv network nplua nuj thiab kev kuaj mob, xws li tsis siv neeg ntaus ntawv lees paub, ntsuas kev ntsuas, thiab kev mob txhaum. Los ntawm kev sib xyaw ua ke cov cuab yeej thiab cov kev tswj hwm network, nws yooj yim los teeb tsa thiab saib cov kev ntseeg tau thiab kev tswj hwm ntawm lub system.
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