CAN tsheb npav (Controller Area Network) yog ib qho kev sib txuas lus sib txuas lus dav siv hauv tsheb, kev lag luam automation, thiab lwm yam. Hauv qab no yog ob peb txoj kev sib txuas lus hauv tsheb npav CAN:
1. TSI 2.0A:Kuj tseem hu ua Standard CAN (Classical CAN), nws yog CAN kev sib txuas lus tsheb npav ntau tshaj plaws. Nws siv 11-ntsis tus cim (ID) teb thiab txhawb nqa qhov siab tshaj plaws ntawm 1 Mbps.
2. TSI 2.0B:Zoo ib yam li CAN 2.0A tab sis ntiav 29-ntsis tus cim (ID) teb, muab ntau dua ID encoding peev xwm. Nws txhawb nqa qhov siab tshaj plaws ntawm 1 Mbps.
3. CAN FD (Flexible Data Rate):Ib qho kev hloov kho tshiab ntawm CAN tsheb npav raws tu qauv, CAN FD muab cov ntaub ntawv xa mus ntau dua thiab cov pob ntawv loj dua. Nws txhawb kev sib kis ceev mus txog 8 Mbps thiab ua kom cov pob ntawv loj dua.
4. CANOPE:CANopen yog qhov qhib siab - theem kev sib txuas lus raws tu qauv tsim los rau kev sib txuas lus ntawm cov cuab yeej tswj. Nws txhais cov txheej txheem kev sib txuas lus thiab kev tswj hwm network rau cov ntaub ntawv sib pauv thiab teeb tsa ntawm cov khoom siv.
5. J1939:J1939 yog kev sib txuas lus raws tu qauv rau hnyav- tsheb thauj mus los thiab kev tsim kho tshuab raws li lub tsheb npav CAN. Nws txhais cov txheej txheem ntawm cov txheej txheem thiab cov lus tawm tswv yim rau kev sib pauv cov ntaub ntawv ntawm lub tsheb hluav taws xob.
Cov no tsuas yog ib feem me me ntawm CAN tsheb npav kev sib txuas lus raws tu qauv. Cov kev cai ntxiv muaj nyob rau uas yog kho rau cov npe thov tshwj xeeb lossis cov tuam txhab tsim khoom tshwj xeeb.
CAN Interface tiv thaiv thiab ua haujlwm raws cai
1. Pom zoo Circuit Court
Daim duab 1 qhia txog qhov pom zoo tiv thaiv Circuit Court rau CAN interface. Kev tiv thaiv kom zoo ua rau muaj kev cuam tshuam zoo rau kev tiv thaiv kev cuam tshuam. Kev tiv thaiv tsheb npav yog siv nyob rau hauv peb theem: Theem 1 muab siab - lub zog tawm, Theem 2 ua qhov kev txwv tam sim no, thiab Theem 3 siv voltage clamping. Txhua theem Circuit Court ua tiav nws cov haujlwm tshwj xeeb, ua haujlwm ua ke kom ua tiav kev tiv thaiv zoo.
Daim duab 1 Pom zoo tiv thaiv Circuit Court rau CAN Interface
2. Txoj Cai Ua Haujlwm -Differential Mode Loop
Raws li pom nyob rau hauv daim duab 2, thaum sib txawv- hom cuam tshuam voltage yog siv rau tus pins 1 thiab 2 ntawm lub interface, TVS1 teb sai tshaj plaws thiab ua ntej, clamping qhov voltage ntawm lub chip bus pins CANH thiab CANL. Resistors R2 thiab R3 txwv qhov tam sim no ntws los ntawm TVS1, tiv thaiv kev puas tsuaj overpower. GDT teb qeeb tshaj plaws thiab ua qhov kawg, dissipating feem ntau ntawm lub zog thiab txwv qhov seem seem mus rau theem qis.
Daim duab 2 Differential Mode Discharge Circuit Diagram
3. Txoj Cai Ua Haujlwm-Common-Mode Loop
Raws li pom nyob rau hauv daim duab 3, los xyuas kom meej kev tiv thaiv zoo, kev sib txuas lus siv hauv av CANG yuav tsum tau grounded ntawm ib qho taw tes tom qab kev teeb tsa network. Thaum sib xws-mos cuam tshuam voltage yog siv rau tus pins 1 thiab 2 ntawm lub interface, TVS1 teb sai tshaj plaws thiab ua ntej, clamping qhov voltage ntawm lub chip bus pins thiab CANG. Resistors R2 thiab R3 txwv qhov tam sim no ntws los ntawm TVS1 los tiv thaiv kev puas tsuaj overpower. GDT teb qeeb tshaj plaws thiab ua qhov kawg, dissipating feem ntau ntawm lub zog thiab txwv qhov seem seem mus rau theem qis.
Daim duab 3 Schematic of Common-Mode Discharge PathwayYuav ua li cas teeb meem kev sib txuas lus Circuit Court Failures
Thaum ntsib kev sib txuas lus tsis ua haujlwm, sim ua cov kauj ruam hauv qab no los daws qhov teeb meem:
1. Tshawb xyuas kev sib txuas ntawm lub cev:Xyuas kom tag nrho cov cables ruaj ntseg txuas thiab txuas ruaj khov. Xyuas kom tseeb tias cov hlua hluav taws xob, cov kab hluav taws xob network, cov xov tooj, thiab lwm yam, txuas nrog zoo.
2. Rov pib cov khoom siv:Qee zaum, tsuas yog rov pib dua cov cuab yeej tuaj yeem daws teeb meem kev sib txuas lus. Sim rebooting cov cuab yeej cuam tshuam, suav nrog routers, keyboards, modems, thiab lwm yam.
3. Txheeb xyuas cov khoom siv:Xyuas kom tseeb tias cov cuab yeej configuration tsis raug teeb tsa raug. Tshawb xyuas IP chaw nyob, lub npog ntsej muag subnet, lub rooj vag, DNS chaw, thiab sib piv nrog cov ntaub ntawv muab los ntawm koj lub network muab kev pabcuam.
4. Tshem tawm kev cuam tshuam los ntawm lwm yam khoom siv:Tshem tawm ib ntus lwm yam khoom siv uas yuav ua rau muaj kev cuam tshuam, xws li xov tooj cua, microwaves, Bluetooth li, thiab lwm yam.
5. Hloov kho firmware thiab tsav tsheb:Mus saib cov vev xaib raug cai ntawm cov khoom siv cuam tshuam los rub tawm thiab nruab qhov tseeb firmware thiab cov tsav tsheb, kom ntseeg tau tias muaj txiaj ntsig zoo.
6. Rov kho cov cuab yeej:Rau cov routers, keyboards, thiab cov cuab yeej zoo sib xws, sim rov qab kho lawv mus rau lub Hoobkas chaw ua ntej rov teeb tsa.
7. Hu rau koj tus kws kho mob hauv internet:Yog tias tsis muaj ib txoj hauv kev saum toj no daws qhov teeb meem, nws yuav yog vim ISP tawg. Hu rau lawv tam sim kom tshaj tawm qhov teeb meem.
8. Nrhiav kev pab tshaj lij:Yog tias koj tsis paub txog kev kho vaj huam sib luag lossis kev daws teeb meem hauv lub network, nws raug nquahu kom nrhiav kev pab los ntawm tus kws tshaj lij uas tuaj yeem kuaj xyuas thiab daws qhov teeb meem kom raug.