Nukatae J1939 ƒe Ami ƒe Agbɔsɔsɔme Bu Le Nukpɔkpɔa Me?

Nyitsɔ laa la, èwɔ asitɔtrɔ le egbegbe dijitaal-nukpɔkpɔ abe Garmin, Murphy, alo Amegbetɔ-Mɔ̃ ƒe Dɔwɔƒe (HMI) si wowɔ ɖe ɖoɖo nu ene ŋu. Èkpɔ mɔ be mɔ̃a ƒe didiƒedzidzenu si me kɔ abe kristalo ene kple nyatakakawo xexlẽ pɛpɛpɛ. Le esi teƒe be amidzidzenu naxlẽ nu nyuie la, eɖea vodada aɖe fiana, xlẽa zero, alo nɔa ƒuƒlu keŋkeŋ. Nɔnɔme sia si ɖea dzi le ame ƒo la tɔa te dɔwɔwɔ enumake eye wònana dɔwɔlawo ƒe ŋku gbã keŋkeŋ le woƒe ami si wodzra ɖo la ŋu.

Le SAE J1939 kple CAN bɔs ƒe kadodowo me la, ƒã hafi ami ƒe agbɔsɔsɔ si bu nyea screen si gbã. Ɣesiaɣi kloe la, enyea kpododonu le hardware kadodo me, protocol ƒe masɔmasɔ, alo analog-to-digital gɔmeɖeɖe ƒe vodada. Egbegbe dijitaal-nukpɔkpɔwo kpɔa mɔ na nyatakaka babla siwo ŋu wowɔ ɖoɖo ɖo vevie. Ne nyatakaka babla la bu, gblẽ, alo woɖoe ɖe duƒuƒu si mesɔ o la, ɖeko gauge la mete ŋu yɔa eme o.

Mɔfiame sia gblẽa nusiwo gbɔ J1939 ƒe ami ƒe dzesi si bu la tsona me. Àsrɔ̃ alesi nàɖe vodadawo ɖe vovo le kaƒomɔ̃ ŋutɔŋutɔ kple nyatakaka ƒe kadodo ƒe ƒuƒoƒoawo dome. Gakpe ɖe eŋu la, míegblɔ dzidzenu sesẽ siwo dzi woato atia sensor alo analog-to-CAN converter nyuitɔ si woatsɔ aɖɔlii. Àte ŋu azã gɔmesese siawo atsɔ agbugbɔ network ƒe liƒo aɖo te kabakaba.

Nu Vevi Siwo Wotsɔna Yia Nu

• Zi geɖe la, J1939 ƒe ami ƒe agbɔsɔsɔ si medzena le nukpɔkpɔa dzi o la tsoa nuwuwu ƒe tsitretsiɖeŋunu siwo bu, baud ƒe agbɔsɔsɔme si mesɔ o (250k tsɔ wu 500k), alo PGN 65276 (SPN 96) ƒe gbeƒãɖeɖe ƒe kpododonu gbɔ.

• Mɔ̃ xoxo aɖe dodo ɖe ŋgɔ wòazu dijitaal HMI bia be woawɔ analog-to-CAN converter tɔxɛ aɖe ne wolé ame gbãtɔ si ɖoe ɖa si te ŋu tsi tre ɖe eŋu la ɖe asi.

• Ne èle SAE J1939 tank level sender yeye aɖe me tom la, tsɔ unit siwo si dzɔtsoƒe adrɛs siwo woate ŋu aɖo kple IP67+ ƒe dzidzedzekpɔkpɔ sesẽwo le na nuto sesẽwo ɖo nɔƒe gbãtɔ.

• Nya sia gbɔ kpɔkpɔ ɖe ɖoɖo nu xea mɔ na dijitaal-nukpɔkpɔ siwo wɔa dɔ bliboe ɖɔliɖɔli madzemadzee.

Asitsatsa ƒe Gazazã si le J1939 ƒe Ami ƒe Agbɔsɔsɔme Meɖee Fia O

Lɔri sesẽwo, ƒudziʋuwo, kple dɔwɔƒewo ƒe elektrikŋusẽnamɔ̃wo ɖoa ŋu ɖe telemetry nyatakaka siwo sɔ pɛpɛpɛ ŋu vevie. Dɔwɔwɔ ami ŋuti nyatakaka siwo de pɛpɛpɛ manɔmee hea dɔwɔwɔ ƒe afɔku gã aɖe vɛ le akpa siawo katã me. Èdzea ŋgɔ ami ƒe vɔvɔ si gblẽa nu le teƒe didiwo kple ɣeyiɣi si mèle mɔ kpɔm na o le dɔ veviwo wɔwɔ me. Diesel-mɔ̃wo koŋue ate ŋu agblẽ nu le mɔ̃memi ƒe dɔwuame ŋu. Zi geɖe la, ne wotsɔ diesel-ʋu gã aɖe ƒu keŋkeŋ la, enaa ya si le mɔ̃a me la xena sesĩe le atike si wodona ɖe mɔ̃a me la me. Ʋu si dona le mɔ̃memi ƒe ka siwo me yaƒoƒo sesẽ le me bia be mɔ̃ɖaŋununya nade nu eme vevie, si azi nunɔamesi la dzi be wòaganɔ Internet dzi gaƒoƒo geɖe o.

Zi geɖe la, dɔwɔlawo tsɔa asibidɛwo ɖoa dijitaal-nukpɔmɔ̃ xɔasi la ŋu ne dzidzenuwo do kpo dɔwɔwɔ. Wobua fɔ HMI ƒe screen deŋgɔ la vodadatɔe esime kpododonu ŋutɔŋutɔ ɣla ɖe kaƒomɔ̃a me goglo. Zi geɖe la, àkpɔe be kaƒomɔ̃a ƒe vodada bɔbɔe aɖee na be kaƒomɔ̃a tsi. Network node si womeɖo nyuie o alo pin si xɔ dzo hã ate ŋu ana screen ƒuƒlu ma tututu nanɔ anyi. Fɔbubu screen la hea dodokpɔ siwo gblẽa nu le dɔlélewo ŋu kple dziɖeleameƒo si nuwuwu meli na o vɛ na beléle na dɔwɔƒea.

Dzadzraɖo dzidzedzetɔe ɖoa ami ŋuti nyatakakawo kaka ɖe bɔs bliboa me ɖaa, si li ke. Ele be network la naɖo nyatakakawo ɖe dzesidenu nyuitɔ dzi heheɖemegbe manɔmee. Mele be nàkpɔ network ƒe ƒoƒo aɖeke kura le wò dɔlékuiwo didi ƒe dɔwɔnuwo dzi o. Ele be ɖoɖoa naɖe vodada ɖesiaɖe si dona tso kadodoa me ɣesiaɣi alo ɣeyiɣi ƒe nuwuwu ɖa keŋkeŋ. Esia gbɔ ɖoɖo nana be dɔwɔwɔwo ŋu kakaɖedzi le ŋutɔ eye wònaa dɔwɔlawo gakana ɖe woƒe dijitaal dzidzenuwo dzi.

Physical Layer vs. Data Link: Kadodoa ƒe Dzesidede

Nusiwo tae nèle a J1939 ami ƒe agbɔsɔsɔ si meɖena fiana o bia be woama network la ɖe afã vovovo eve me. Ele be nàda physical wiring hardware kple digital protocol software la kpɔ ɖe vovo. Kuxiwo gbɔ kpɔkpɔ ƒe afɔɖeɖe siawo tsakatsaka gblẽa ɣeyiɣi xɔasi si woatsɔ akpɔ dɔlélea gbɔe.

Nusiwo Woɖe Ðe Ðe Vo Ðe Ðeɖe Ðe Go (Wiring Kple Hardware) .

Dzɔdzɔmeŋusẽ ƒe ƒuƒoƒoa tsɔa elektrikŋusẽ ƒe ʋuʋudedi ƒuƒluawo yia dziɖulawo dome. Ne gɔmeɖoanyi sia do kpo nu la, dijitaal nyatakaka aɖeke meɖoa nufiamɔ̃a gbɔ o.

• Termination Resistors: CAN networks bia vevie be 120-ohm resistors le megbeƒu gã la ƒe nuwuwu eveawo. Resistors siwo bu nana dzesiwo ƒe keklẽ sesẽna le kaƒomɔ̃a ŋu. Ŋugbledede sia ƒoa nyatakakawo ƒe bablawo eye wòdaa ami ŋuti nyatakakawo keŋkeŋ. Zã dijitaal multimeter ɣesiaɣi nàtsɔ adzidze tsitretsitsi le CAN High kple CAN Low dome. Ele be wòaxlẽ abe ohms 60 ene ne wodo ŋusẽ mɔ̃a.

• Harness Integrity: Lé ŋku ɖe kaƒomɔ̃a ƒe mɔ dzi nyuie le chassis alo ʋua ƒe ʋuƒoa ŋu. Kpɔe ɖa be CAN High alo CAN Low ka siwo wobla ɖe xɔtunuwo gbɔ hã. Ele be nàɖo kpe anyigba ƒe kadodo vevi siwo le sensor ƒe ta hã dzi. Anyigba si gblẽ la naa elektrikŋusẽ ƒe ŋusẽ ƒe tɔtrɔ. Offset siawo xea mɔ na transceiver chip la be wòagaxlẽ differential signals nyuie o.

• Connector Corrosion: Kpɔ kadodoawo ɖa be green oxidation hã le wo me hã. Tsi si gena ɖe plug la me gblẽa CAN ƒe elektrikŋusẽ si le bɔbɔe la dome. Klɔ pin-awo ŋu nyuie eye nàde dielectric grease wo be tsi nagaƒo ƒu ɖe wo ŋu le etsɔme o.

Protocol Layer (Nyatakakawo Kple Kɔmpiutadziɖoɖowo) Ðeɖe Ðe Vovo .

Ne kaƒoƒo dodokpɔawo ɖi bliboe la, zi geɖe la, nyaa ɣlana ɖe nyatakakawo ƒe ƒuƒoƒoa me. Kɔmpiutadziɖoɖowo ƒe ɖoɖo gbegblẽwo bɔ ŋutɔ le dɔwɔnu siwo wodzrana le asi megbe ƒe asitɔtrɔ me.

• Baud Rate Mismatches: Ele be network nodes naƒo nu le duƒuƒu ma ke tututu me. Ne wò mɔ̃ vevitɔ ƒe network zɔna le 500 kbps, gake sensor si woɖɔli la kakaa 250 kbps la, kadodoa doa kpo nu enumake. Nukpɔkpɔa mate ŋu atso nyatakaka siwo le blewu wu la me o. Àkpɔ screen ƒuƒluwo alo kadodo ƒe ɣeyiɣi ƒe nuwuwu ƒe vodada sesẽwo le dash la dzi.

• PGN kple SPN ƒe Kpeɖodzi: Dɔwɔƒe ƒe dzesidenu si wozãna ɖaa na Dash Display ami ƒe sesẽme enye Parameter Group Number (PGN) 65276. Gbedasi sia koŋ zãa Suspect Parameter Number (SPN) 96. Èhiã CAN analyzer dɔwɔnu tɔxɛ aɖe be nàɖo kpe esia dzi. Doe ɖe mɔ̃ si wotsɔ dia dɔlélewoe la me eye nàlé ŋku ɖe ʋu siwo le zɔzɔm le agbe ŋu. Ne PGN 65276 bu la, ke ɖeko sensor la mele eɖom ɖa o.

• FMS Gateway Filtering: Zi geɖe la, ʋuwo ƒe dɔwɔwɔwo zãa Fleet Management Standard (FMS) gateway module. Agbo sia ma mɔ̃a ƒe bɔs vevi la kple telematics nyatakaka bɔs la dedie. Kpɔ egbɔ be agbo la mele ami ƒe agbɔsɔsɔme PGN la ƒom vevie hafi wòaɖo dashboard ƒe nukpɔkpɔa gbɔ gbeɖe o.

Gbugbɔgaɖɔɖo ƒe Kuxia: Analog Dɔdɔlawo ƒe Tɔdzisasrã Ðe Digitál Nukpɔkpɔwo Ŋu

Diesel-mɔ̃ xoxowo ɖoa ŋu ɖe mɔ̃ɖaŋununya bɔbɔe ŋutɔ si xɔ ƒe bla nanewo ŋu tsɔ dzidzea ami. Zi geɖe la, wozãa analog senders siwo te ŋu tsi tre ɖe wo nɔewo ŋu siwo wotu ɖe mɔ̃ si wotsɔna ƒua du si le ʋuʋum ŋu. Dɔdzikpɔla siawo ɖea tsitretsitsi ƒe didime siwo trɔna xoxowo abe Amerikatɔwo ƒe dzidzenu 240-33 ohms alo Europatɔwo ƒe dzidzenu 0-190 ohms ene dona. Digitál packet deŋgɔwo koe egbegbe J1939 ƒe ɖeɖefiawo sea egɔme. Womate ŋu axlẽ elektrikŋusẽ ƒe tsitretsitsi xoxo sia tẽ o, si wɔnɛ be xɔtunuwo ƒe masɔmasɔ vevi aɖe va nɔa anyi.

Egbɔkpɔnu ƒe Ƒomedodo: Analog-to-CAN Trɔlawo

Ðewohĩ màdi be yeaɖe tsi le dɔwɔƒewo ƒe tsidzɔƒe gã aɖe me enumake o. Àte ŋu atiae be yeagblẽ analog unit si li xoxo la ɖe teƒea bliboe. Analog-to-J1939 ƒe agbo ate ŋu awɔ analog dzesi si li la wòazu dijitaal. Module sue sia si le fli me la wɔa dɔ abe gbegɔmeɖela si me nunya le ene le ame xoxo si ɖoe ɖa kple dijitaal-nukpɔkpɔ yeyea dome. Exlẽa tsitretsiɖeŋua eye wòtrɔnɛ wòzua CAN packet si sɔ.

Gake ele be nàɖɔ ŋu ɖo vevie le nuƒleɣi. Ƒo asa na tɔtrɔmɔ̃ siwo ƒe asi bɔbɔ, siwo ƒe ŋkɔ mele o, siwo tso asitsaƒe siwo wozãna le Internet dzi siwo wozãna le mɔ vovovowo nu. Zi geɖe la, woɖea dzɔtsoƒe adrɛs siwo wotsɔ hardcoded wɔe siwo màte ŋu atrɔ o la fiana. Adrɛs siawo siwo woŋlɔ sesĩe la tsi tre ɖe Engine Control Units (ECU) alo transmission controller siwo li fifia ŋu enuenu. Adrɛs ƒe masɔmasɔ sia hea network ƒe ƒoƒo enumake vɛ, si wɔnɛ be ɖoɖo veviwo ƒuna le Internet dzi.

Egbɔkpɔnu ƒe Ƒomedodo: Digitál Trɔtrɔ Tsã

Mɔnu si le dzadzɛ wu eye kakaɖedzi le eŋu wu be woatsɔ aɖɔ nuwo ɖoe nye be woaɖɔli xɔtunuwo bliboe. Èɖea mɔ̃ xoxo si tsi tre ɖe eŋu la ɖa keŋkeŋ le tsigoa me. Emegbe èdea native, solid-state CAN bus ƒe ami ƒe sesẽme ƒe dzesi . Dodoɖeŋgɔ sia ɖea titinatɔ ƒe tɔtrɔla ƒe aɖaka ɖa keŋkeŋ. Nu yeyea kakaa dijitaal agbalẽviwo ɖe megbeƒu gã la dzi tẽ. Togbɔ be ebia be woate ŋu age ɖe aʋawɔʋu ŋutɔŋutɔ me hafi woate ŋu aɖoe hã la, enaa kakaɖedzi si le network bliboa ŋu kple nyatakakawo ƒe nyateƒetoto nyona ɖe edzi ŋutɔ.

Dzesidede SAE J1939 Tank Level Sender si Woatsɔ Aɖɔlii

Ne wò dɔlélenutsiŋutetewo fia asi sensor si ku tegbee la, ele be nàtia nusi woatsɔ aɖɔlii nyuie. Menye amesiamee o SAE J1939 tank level sender wɔa dɔ nyuie nenema ke le nɔnɔme sesẽ siwo me ʋuʋudedi le me.

Mɔ̃ɖaŋununya si Wotsɔ dzidzea Nu

Zi geɖe la, nuƒlelawo tiaa egbegbe capacitive designs kple dekɔnu reed switch models dome. Capacitive sensors naa nuxexlẽ siwo yia edzi, siwo ƒe nɔnɔme deŋgɔ to tsia ŋutɔ ƒe dielectric ƒe tɔtrɔ dzidzedze me. Kɔmpiutadziɖoɖo sia si le ememe la ɖea afɔɖeɖe ŋutasesẽtɔe si nèkpɔna be ami ƒe ʋuʋu le mɔzɔzɔ sesẽ me la ɖa. Wode ŋgɔ sasasã na CAN bɔs ƒe ƒoƒo ɖekae si sɔ pɛpɛpɛ ŋutɔ. Reed-switchwo ɖoa ŋu ɖe magnet-ŋusẽ si le tsia dzi ŋutɔŋutɔ si le ʋuʋum le nutome sue ƒe ʋuƒo dzi ŋu. Ne tsi si le tsia dzi la to magnet ƒe dometsotso aɖewo koŋ ŋu ŋutɔŋutɔ ko hafi wowɔa nuxexlẽa yeyee.

Ðoɖowɔwɔ ƒe Trɔtrɔ Ðe Nɔnɔmewo Ŋu (Ele vevie ŋutɔ na BOF ƒe Nyametsotsowo) .

Èhiã be nàtrɔ asi le ɖoɖowɔwɔ ŋu wòasɔ gbɔ wu ne èle xɔtunu yeyewo tsɔm de lãwo ƒe agbenɔnɔ ƒe ɖoɖo si li fifia me. Adrɛs biabia le vevie ŋutɔ na dɔwɔwɔ nyuie si me vodada aɖeke mele o. Bia nya ʋɛ aɖewo siwo le vevie ŋutɔ hafi nàƒle nu. Ðe nàte ŋu atrɔ sensor la ƒe Dzɔtsoƒe Adrɛs bɔbɔe to ɖoɖowɔɖi dɔwɔnu si wozãna ɖaa zazã mea? Àte ŋu aɖɔ tsigoe ƒe nɔnɔme si le eme la akpɔ be tsigoe ƒe nɔnɔme mele ɖoɖo nu o alo esi wowɔ ɖe ɖoɖo nua? Ƒudziʋu siwo me V-hull le kple saddle tanks siwo ƒe afɔtiwo le sesẽm la hiã be woawɔ volumetric map siwo wowɔ ɖe ɖoɖo nu. Ne ɖoɖowɔɖi ƒe ŋutete mele sensor la si o la, ate ŋu agblɔ be aʋawɔʋu si yɔ afã kple afã la mesɔ o le aʋawɔʋua ƒe nɔnɔme wɔnuku ta.

Dzidzenu Siwo Nànɔ Eteƒe Nadidi Kple Wo Dzi Wɔwɔ

Nutoa me nutrenue gblɔa ƒumelãwo kple nusiwo dea dzesi nu sesẽwo ƒe agbenɔƒe mlɔeba. Di SAE J1939 ƒe dzidzenua dzi wɔwɔ koŋ, si woŋlɔ ɖi. Àdi hã be nàxɔ CE kple RoHS ƒe ɖaseɖigbalẽ siwo sɔ be nàkpɔ egbɔ be elektrikŋusẽ le dedie. Lé ŋku ɖe Ingress Protection ƒe dzidzedzekpɔkpɔ siwo dziɖuɖua da asi ɖo ŋu etɔxɛe le spec sheet la dzi. Èhiã IP67 alo IP68 nutome nutrenu vevie be nàkpɔ nutome sue si le eme ta. Tsi ƒe gege ɖe eme gakpɔtɔ nye nu vevitɔ kekeake si gbɔ sensor ƒe ku kaba le agblea me tsona.

Amidɔdɔ ƒe Mɔ̃ɖaŋununyawo ƒe Dɔwɔwɔ Tsɔtsɔ Sɔ Kple Wo Nɔewo

Dɔwɔwɔ ƒe Nyateƒenyawo Kple Afɔɖeɖe Siwo Gbɔna

Ðoɖo si me susu le, si woɖo ɖe ɖoɖo nu dzi wɔwɔ ɖea dziɖeleameƒo gaƒoƒo manyaxlẽwo ɖa. Zã afɔɖeɖe siawo tututu siwo nàtsɔ akpɔ dɔlélea gbɔe nàtsɔ agbugbɔ wò nukpɔkpɔ ƒe dɔwɔwɔ aɖo ɖe ɖoɖo nu.

1. Kpɔ CAN Bus Traffic ɖa: Hafi nàƒle xɔtunu yeye aɖeke la, do J1939 code reader ɖe diagnostic port vevitɔa me. Àte ŋu azã USB CAN sniffer si wozãna ɖaa hã le kɔmpiuta dzi. Di SPN 96 koŋ le nyatakakawo ƒe sisi me. Ne ele bɔs la me la, sensor la wɔa dɔ nyuie. Ðeko womewɔ ɖoɖo ɖe nukpɔkpɔa ŋu nyuie o eye wòhiã be woawɔ kɔmpiutadziɖoɖoa yeyee. Ne packet la bu keŋkeŋ la, ke sensor alo kaƒomɔ̃a do kpo dɔwɔwɔ.

2. Kpɔ Network Architecture ɖa: Kpɔ egbɔ be yedae ɖe mɔ̃a dzi yeyee J1939 ami ƒe sesẽme sensor doa ka kple akɔta si sɔ ŋutɔŋutɔ. Dɔdzikpɔla geɖe tsɔa ka dea bɔs evelia si nye wo tɔ me le vo me. Esia nye vodada si bɔ ŋutɔ le ƒudzi NMEA 2000 kple J1939 ƒe ɖoɖo sesẽwo me. Nukpɔkpɔa mate ŋu axe mɔ ɖe dometsotsoa nu ne mɔxenu ƒe agbo tɔxɛ aɖeke mele eme o.

3. Lé ŋku ɖe Tsitretsitsi si le Nuwuwu Ŋu: Tsi batri ƒe ŋusẽ katã le ɖoɖoa me. Tsɔ multimeter do CAN High kple CAN Low pinwo me. Kpɔ egbɔ be yekpɔ ohm 60. Ne èkpɔ ohm 120 la, ke èle terminating resistor aɖe bu le bɔs la ƒe nuwuwu ɖeka. Ne èkpɔ ohms 40 alo esi mede nenema o la, ke resistors sɔ gbɔ akpa na wò.

4. Ŋlɔ Egbɔkpɔnu kpui aɖe: Da wò aʋawɔʋua ƒe gege ɖe eme kpɔ nyuie. Ne woate ŋu age ɖe tsigoa me bɔbɔe tso etame la, ƒle J1939 si nye native liquid level sensor. Mɔnu sia naa kakaɖedzi si sɔ gbɔ wu ɣeyiɣi didi. Ne wotu tsigoea keŋkeŋ alo womate ŋu age ɖe eme le anyigba kpekpewo te o la, ƒle dzesi trɔla si nye analog-to-J1939 si ƒe nyonyome deŋgɔ si woate ŋu awɔ ɖoɖo ɖe eŋu boŋ.

Nyanuwuwuw

Telemetry ŋuti nyatakaka veviwo gbugbɔgaɖoanyi bia be woawɔ dɔlélewo didi ƒe mɔnu si ŋu ɖoɖo le tsɔ wu be woaɖɔli akpa aɖewo le vome. Ele be nàɖo kpe kadodo ŋutɔŋutɔwo kple ɖoɖowɔɖi ƒe ɖoɖowo dzi hafi aka asi aʋawɔʋu ŋutɔŋutɔ ƒe xɔtunuwo ŋu. Ne èdze ŋgɔ analog ƒe masɔmasɔwo la, tia agbo siwo woate ŋu awɔ ɖoɖo ɖe wo ŋu le ɖoɖo nyui nu be nàkpɔ network ƒe blibonyenye ta. Ne èdi be yeaɖɔli bliboe la, tsɔ solid-state capacitive technology ɖo nɔƒe gbãtɔ be nàka ɖe edzi be nyatakaka nade pɛpɛpɛ wu. Ðo kpe wò network baud rates kple source adrɛswo dzi ɣesiaɣi le installation ƒe akpa mamlɛtɔ me. Mɔfiame siawo pɛpɛpɛ dzi wɔwɔ kpɔa egbɔ be wò dijitaal-nukpɔkpɔwo naa dɔwɔwɔ ŋuti nyatakaka siwo de pɛpɛpɛ, siwo metso o, hena ɣeyiɣi didi aɖe.

Nyabiasewo ƒe Nyabiasewo

Q: PGN kae wozãna na J1939 ƒe ami ƒe agbɔsɔsɔ?

A: Fuel level data zi geɖe la, woɖea gbeƒã le Parameter Group Number (PGN) 65276. PGN tɔxɛ sia sɔ kple Dash Display dɔwɔwɔ si wozãna ɖaa. Le gbedasi ƒe agbalẽvi sia koŋ me la, network la zãa Suspect Parameter Number (SPN) 96 tsɔ tsia tre ɖi na Fuel Level 1 pɛpɛpɛ.

Q: Ðe mate ŋu atsɔ analog fuel sender aƒo ƒu ɖe J1939 ƒe ɖeɖefia ŋu tẽa?

A: Ao, màte ŋu atsɔ wo aƒo ka na wo tẽ o. Egbegbe J1939 ɖeɖefiawo wɔa dɔ tso dijitaal CAN gbedasiwo ko ŋu. Analog dɔlawo ɖea elektrikŋusẽ ƒe tsitretsitsi si trɔna abe 240-33 ohms ene dona. Ele be nàde analog-to-CAN ƒe agbo tɔxɛ aɖe wò kɔmpiuta dzi. Trɔla sia ɖea elektrikŋusẽ ƒe tsitretsitsi xoxoa gɔme ɖe dijitaal-packet siwo woɖo nyuie me.

Q: Nukatae nye ami ƒe agbɔsɔsɔme ɖiɖina ɣeaɖewoɣi va ɖoa zero le digital dash la dzi?

A: Zi geɖe la, tsidzadza siwo nɔa anyi ɣeaɖewoɣi fiaa ŋutilã me ƒuƒoƒo ƒe nyawo tsɔ wu be wòanye sensor siwo ku keŋkeŋ. Ele be nàkpɔe ɖa be 120-ohm termination resistors bu le CAN backbone la dzi hã. Eyome, lé ŋku ɖe kaƒomɔ̃ gã la ŋu be CAN High alo CAN Low kaƒoƒo siwo me mekɔ o hã. Mlɔeba la, kpɔ anyigba ƒe kadodo si le sensor ƒe ta dzi ɖa.

Q: Ðe mehiã 250k alo 500k baud rate sensor?

A: Enɔ te ɖe wò ʋu alo tɔdziʋu ƒe kadodo ƒe xɔtuɖoɖo tɔxɛ dzi bliboe. J1939 ƒe kadodo sesẽ siwo nye domenyinu akpa gãtɔ wɔa dɔ le 250 kbps dzi. Gake zi geɖe la, elektrɔnikmɔ̃ yeyewo ʋuna yia duƒuƒu si nye 500 kbps kabakaba wu gbɔ. Ele be nàtsɔ sensor yeyea ƒe baud ƒe tsɔtsɔme asɔ kple wò network si li xoxo la pɛpɛpɛ be nàxe mɔ ɖe kadodo ƒe kpododonu nu.