{"id":87955,"date":"2023-01-11T13:00:06","date_gmt":"2023-01-11T12:00:06","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/magistrala-can-co-to-jest-i-jak-dziala\/"},"modified":"2024-09-04T12:32:53","modified_gmt":"2024-09-04T10:32:53","slug":"sbernice-can-co-je-to-a-jak-funguje","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/sbernice-can-co-je-to-a-jak-funguje\/","title":{"rendered":"Sb\u011brnice CAN &#8211; Co je to a jak funguje?"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">\u010cas \u010dten\u00ed:<\/span> <span class=\"rt-time\"> 4<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"87955\" class=\"elementor elementor-87955 elementor-43608\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-ce19765 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"ce19765\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-506ea47\" data-id=\"506ea47\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-780c306 elementor-widget elementor-widget-text-editor\" data-id=\"780c306\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Za\u017e\u00edvaj\u00ed sb\u011brnice CAN renesanci? Ne tak docela, proto\u017ee ve skute\u010dnosti se nikdy nepou\u017e\u00edvaly. Pod\u00edvejte se, jak p\u0159esn\u011b vypadaj\u00ed jejich technologick\u00e9 specifikace a k \u010demu se pou\u017e\u00edvaj\u00ed.  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab3497b elementor-widget elementor-widget-text-editor\" data-id=\"ab3497b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ka\u017ed\u00fd zn\u00e1 jm\u00e9no jejich p\u016fvodce. V \u00fanoru 1986 p\u0159edstavila spole\u010dnost Robert Bosch GmbH na kongresu Society of Automotive Engineers syst\u00e9m s\u00e9riov\u00e9 sb\u011brnice CAN (Controller Area Network). T\u00edm se zrodil jeden z nej\u00fasp\u011b\u0161n\u011bj\u0161\u00edch s\u00ed\u0165ov\u00fdch protokol\u016f v historii. Od t\u00e9 doby uplynulo t\u00e9m\u011b\u0159 40 let a dnes je \u0159ada osobn\u00edch automobil\u016f vyr\u00e1b\u011bn\u00fdch v Evrop\u011b vybavena alespo\u0148 jednou s\u00edt\u00ed CAN.   <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8455897 elementor-widget elementor-widget-heading\" data-id=\"8455897\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN - kde se vzala? <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-da8decf elementor-widget elementor-widget-text-editor\" data-id=\"da8decf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><a style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-weight: var( --e-global-typography-text-font-weight ); background-color: #ffffff; font-size: 1rem;\" href=\"\/733-magistrala-can\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">Sb\u011brnice CAN<\/a> v\u00fdznamn\u011b zm\u011bnily automobilov\u00fd pr\u016fmysl. Dnes se celosv\u011btov\u011b pou\u017e\u00edvaj\u00ed jako z\u00e1klad s\u00edt\u00ed vestavn\u00fdch syst\u00e9m\u016f v mnoha oblastech, nejen v automobilov\u00e9 technice. Prvn\u00ed \u0159\u00eddic\u00ed \u010dipy CAN od spole\u010dnost\u00ed Intel a Philips Semiconductors se objevily v roce 1987 a ji\u017e v roce 1991 byla zve\u0159ejn\u011bna specifikace CAN 2.0 od spole\u010dnosti Bosch. Tato norma krom\u011b protokolu CAN standardizovala tak\u00e9 fyzickou vrstvu pro p\u0159enosov\u00e9 rychlosti a\u017e 1 Mbit\/s. A\u010dkoli byl CAN p\u016fvodn\u011b vyvinut pro pou\u017eit\u00ed v osobn\u00edch automobilech, prvn\u00ed pokusy o vyu\u017eit\u00ed t\u00e9to technologie se uskute\u010dnily v jin\u00fdch segmentech trhu. Pr\u016fkopn\u00edky v tomto odv\u011btv\u00ed se stali Skandin\u00e1vci.     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-1f8766d elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"1f8766d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-673a15a\" data-id=\"673a15a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-286beee elementor-widget elementor-widget-text-editor\" data-id=\"286beee\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ve Finsku sb\u011brnici CAN zavedl v\u00fdrobce v\u00fdtah\u016f KONE a \u0161v\u00e9dsk\u00e1 stroj\u00edrensk\u00e1 firma Kvaser navrhla CAN jako komunika\u010dn\u00ed protokol v za\u0159\u00edzen\u00edch pro v\u00fdrobce textiln\u00edch stroj\u016f. Pot\u00e9 se k u\u017eivatel\u016fm sb\u011brnice CAN p\u0159idali Nizozemci &#8211; tamn\u00ed spole\u010dnost Philips Medical Systems se rozhodla pou\u017e\u00edt CAN pro vnit\u0159n\u00ed s\u00ed\u0165 rentgenov\u00fdch p\u0159\u00edstroj\u016f. Technologie s\u00e9riov\u00e9 sb\u011brnice st\u00e1le nach\u00e1z\u00ed \u00fa\u017easn\u00e9 nov\u00e9 aplikace.   <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-8610b84\" data-id=\"8610b84\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-b30bc12 elementor-widget elementor-widget-heading\" data-id=\"b30bc12\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN - co to je? <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1a2356 elementor-widget elementor-widget-text-editor\" data-id=\"f1a2356\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sb\u011brnice CAN je jako nervov\u00fd syst\u00e9m, kter\u00fd umo\u017e\u0148uje nep\u0159etr\u017eitou komunikaci. Propojuje v\u0161echny elektronick\u00e9 \u0159\u00eddic\u00ed jednotky (ECU) a umo\u017e\u0148uje v\u00fdm\u011bnu informac\u00ed. P\u0159elo\u017eeno do odborn\u011bj\u0161\u00edho jazyka, Controller Area Network je pops\u00e1na vrstvou datov\u00e9ho spoje a fyzickou vrstvou. Fyzick\u00e1 vrstva sb\u011brnice CAN definuje komponenty, jako jsou typy kabel\u016f a jejich impedance, \u00farovn\u011b elektrick\u00fdch sign\u00e1l\u016f a po\u017eadavky na uzly.    <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-86ff04f elementor-widget elementor-widget-heading\" data-id=\"86ff04f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN vs. ISO<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3495706 elementor-widget elementor-widget-text-editor\" data-id=\"3495706\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Sb\u011brnice CAN m\u00e1 sv\u00e9 normy obsa\u017een\u00e9 v norm\u00e1ch ISO. Pro vysokorychlostn\u00ed s\u00ed\u0165 CAN popisuje norma ISO 11898-1 vrstvu datov\u00e9ho spoje a norma ISO 11898-2 fyzickou vrstvu. Jak\u00fdch parametr\u016f se t\u00fdk\u00e1 ukazatel fyzick\u00e9 vrstvy?  <\/p>\n<ul>\n<li>P\u0159enosov\u00e1 rychlost &#8211; uzly CAN mus\u00ed b\u00fdt propojeny dvouvodi\u010dovou sb\u011brnic\u00ed s p\u0159enosovou rychlost\u00ed a\u017e 1 Mbit\/s (klasick\u00e1 CAN) nebo 5 Mbit\/s (CAN FD).<\/li>\n<li>D\u00e9lka kabelu &#8211; maxim\u00e1ln\u00ed d\u00e9lka kabelu CAN by m\u011bla b\u00fdt 500 metr\u016f (propustnost a\u017e 125 kbit\/s) nebo 40 metr\u016f (propustnost a\u017e 1 Mbit\/s).<\/li>\n<li>Terminace &#8211; sb\u011brnice CAN mus\u00ed b\u00fdt \u0159\u00e1dn\u011b ukon\u010dena, v tomto p\u0159\u00edpad\u011b pomoc\u00ed 120 Ohmov\u00e9ho zakon\u010dovac\u00edho odporu sb\u011brnice CAN na ka\u017ed\u00e9m konci sb\u011brnice. <\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8e12047 elementor-widget elementor-widget-heading\" data-id=\"8e12047\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN - jak funguje a k \u010demu se pou\u017e\u00edv\u00e1? <\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5a4fa74 elementor-widget elementor-widget-text-editor\" data-id=\"5a4fa74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Syst\u00e9m sb\u011brnice CAN umo\u017e\u0148uje ka\u017ed\u00e9 \u0159\u00eddic\u00ed jednotce komunikovat se v\u0161emi ostatn\u00edmi \u0159\u00eddic\u00edmi jednotkami bez slo\u017eit\u00e9ho speci\u00e1ln\u00edho zapojen\u00ed. Prost\u0159ednictv\u00edm CAN mohou p\u0159ipravovat a distribuovat informace, nap\u0159\u00edklad \u00fadaje ze senzor\u016f. Sb\u011brnice se skl\u00e1d\u00e1 ze dvou vodi\u010d\u016f &#8211; CAN low a CAN high. Vyslan\u00e1 data p\u0159ij\u00edmaj\u00ed v\u0161echny ostatn\u00ed ECU v s\u00edti CAN. Ka\u017ed\u00e1 ECU pak m\u016f\u017ee data zkontrolovat a rozhodnout, zda je p\u0159ijme, nebo bude ignorovat.     <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-a86cc25 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"a86cc25\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-89881e1\" data-id=\"89881e1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-58fc9a8 elementor-widget elementor-widget-image\" data-id=\"58fc9a8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"530\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/14937_1a-1024x678.jpg\" class=\"attachment-large size-large wp-image-58585\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/14937_1a-1024x678.jpg 1024w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/14937_1a-300x199.jpg 300w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/14937_1a-768x508.jpg 768w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/14937_1a.jpg 1080w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-899d58c elementor-align-center elementor-widget elementor-widget-button\" data-id=\"899d58c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/1059-diagnostyka-samochodowa\" target=\"_blank\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">POD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-09caea7\" data-id=\"09caea7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-9f9d62a elementor-widget elementor-widget-text-editor\" data-id=\"9f9d62a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>V automobilov\u00e9m syst\u00e9mu sb\u011brnice CAN m\u016f\u017ee b\u00fdt ECU nap\u0159\u00edklad \u0159\u00eddic\u00ed jednotkou motoru, airbag\u016f nebo zvukov\u00e9ho syst\u00e9mu. Modern\u00ed automobil m\u016f\u017ee m\u00edt a\u017e des\u00edtky elektronick\u00fdch \u0159\u00eddic\u00edch jednotek, z nich\u017e ka\u017ed\u00e1 je zodpov\u011bdn\u00e1 za informace, kter\u00e9 mus\u00ed b\u00fdt dostupn\u00e9 ostatn\u00edm \u010d\u00e1stem s\u00edt\u011b. To umo\u017e\u0148uje nap\u0159\u00edklad automatick\u00e9 vyp\u00edn\u00e1n\u00ed airbag\u016f nebo plnou funk\u010dnost syst\u00e9mu ABS.    <\/p>\n<p>Sb\u011brnice CAN je jedn\u00edm z protokol\u016f pou\u017e\u00edvan\u00fdch v <a href=\"\/1059-diagnostyka-samochodowa\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">palubn\u00ed diagnostice<\/a> (OBD). V sou\u010dasn\u00e9 dob\u011b je OBD2 povinn\u00e1 ve v\u0161ech nov\u011bj\u0161\u00edch osobn\u00edch a lehk\u00fdch n\u00e1kladn\u00edch automobilech na cel\u00e9m sv\u011bt\u011b. <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f560c3 elementor-widget elementor-widget-heading\" data-id=\"4f560c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">V\u00fdhody sb\u011brnice CAN<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e553a60 elementor-widget elementor-widget-text-editor\" data-id=\"e553a60\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>C\u00edlem protokolu CAN je umo\u017enit rychlou komunikaci mezi elektronick\u00fdmi za\u0159\u00edzen\u00edmi a moduly a z\u00e1rove\u0148 sn\u00ed\u017eit chybovost, hmotnost za\u0159\u00edzen\u00ed a n\u00e1klady. Jednou z hlavn\u00edch v\u00fdhod sb\u011brnice CAN je redukce kabel\u00e1\u017ee a \u00fa\u010dinn\u00e1 prevence koliz\u00ed zpr\u00e1v. K bezpe\u010dnosti v\u00fdznamn\u011b p\u0159isp\u00edvaj\u00ed mechanismy detekce chyb, jako jsou bit stuffing, bitov\u00e9 monitorov\u00e1n\u00ed, kontrola r\u00e1mc\u016f, kontrola potvrzen\u00ed a kontrola cyklick\u00e9 redundance.   <\/p>\n<p>Syst\u00e9m CAN je z\u00e1kladem trval\u00e9 s\u00edt\u011b, kter\u00e1 pom\u00e1h\u00e1 mnoha za\u0159\u00edzen\u00edm vz\u00e1jemn\u011b komunikovat. V\u00fdhodou je, \u017ee elektronick\u00e9 \u0159\u00eddic\u00ed jednotky (ECU) mohou m\u00edt m\u00edsto analogov\u00fdch a digit\u00e1ln\u00edch vstup\u016f pro ka\u017ed\u00e9 za\u0159\u00edzen\u00ed v syst\u00e9mu jedin\u00e9 rozhran\u00ed CAN. T\u00edm se sni\u017euj\u00ed celkov\u00e9 n\u00e1klady a hmotnost vozidel, stroj\u016f a dal\u0161\u00edch za\u0159\u00edzen\u00ed. Ka\u017ed\u00e9 za\u0159\u00edzen\u00ed v s\u00edti m\u00e1 \u0159\u00eddic\u00ed \u010dip CAN, a je tedy inteligentn\u00ed. V\u0161echny moduly v s\u00edti vid\u00ed odes\u00edlan\u00e9 zpr\u00e1vy a mohou se rozhodnout, zda jsou relevantn\u00ed nebo zda by m\u011bly b\u00fdt filtrov\u00e1ny. Tato struktura umo\u017e\u0148uje \u00fapravy s\u00edt\u011b CAN s minim\u00e1ln\u00edm dopadem &#8211; do celku lze snadno integrovat dal\u0161\u00ed komponenty. Dal\u0161\u00ed nevys\u00edlaj\u00edc\u00ed uzly lze p\u0159id\u00e1vat bez \u00fapravy s\u00edt\u011b.       <\/p>\n<p>Ka\u017ed\u00e1 zpr\u00e1va m\u00e1 svou vlastn\u00ed prioritu, tak\u017ee pokud se dva uzly pokus\u00ed odeslat zpr\u00e1vu sou\u010dasn\u011b, ode\u0161le se ta s vy\u0161\u0161\u00ed prioritou a ta s ni\u017e\u0161\u00ed prioritou se zpozd\u00ed. Takov\u00e1 arbitr\u00e1\u017e je neru\u0161iv\u00e1 a vede k nep\u0159eru\u0161en\u00e9mu p\u0159enosu zpr\u00e1vy s nejvy\u0161\u0161\u00ed prioritou. Umo\u017e\u0148uje tak\u00e9 s\u00edt\u00edm splnit deterministick\u00e1 \u010dasov\u00e1 omezen\u00ed.  <\/p>\n<p>Specifikace CAN obsahuje cyklick\u00fd redundan\u010dn\u00ed k\u00f3d (CRC), kter\u00fd kontroluje obsah ka\u017ed\u00e9ho r\u00e1mce na p\u0159\u00edtomnost chyb. R\u00e1mce s chybami jsou v\u0161emi uzly ignorov\u00e1ny a mohou b\u00fdt p\u0159ed\u00e1ny do s\u00edt\u011b jako sign\u00e1l chyby. Glob\u00e1ln\u00ed a lok\u00e1ln\u00ed chyby rozli\u0161uje \u0159\u00eddic\u00ed jednotka, a pokud je zji\u0161t\u011bno p\u0159\u00edli\u0161 mnoho chyb, mohou je jednotliv\u00e9 uzly p\u0159estat vys\u00edlat nebo se zcela odpojit od s\u00edt\u011b.  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b65ea8a elementor-widget elementor-widget-heading\" data-id=\"b65ea8a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN - kde se pou\u017e\u00edv\u00e1?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-20f2c70 elementor-section-full_width elementor-section-height-default elementor-section-height-default\" data-id=\"20f2c70\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-127877c\" data-id=\"127877c\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-99a4bbb elementor-widget elementor-widget-text-editor\" data-id=\"99a4bbb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Pou\u017e\u00edv\u00e1n\u00ed sb\u011brnice CAN v automobilov\u00e9m pr\u016fmyslu je standardn\u00ed. Nej\u010dast\u011bj\u0161\u00edm pou\u017eit\u00edm sb\u011brnice je vytv\u00e1\u0159en\u00ed elektronick\u00fdch s\u00edt\u00ed ve vozidlech.  <\/p>\n<p>V uplynul\u00fdch desetilet\u00edch za\u010dala spolehliv\u00e1 komunika\u010dn\u00ed \u0159e\u0161en\u00ed zav\u00e1d\u011bt i dal\u0161\u00ed pr\u016fmyslov\u00e1 odv\u011btv\u00ed a za\u010dala vyu\u017e\u00edvat mnoha v\u00fdhod sb\u011brnice CAN. S\u00e9riovou komunika\u010dn\u00ed sb\u011brnici vyu\u017e\u00edvaj\u00ed nap\u0159\u00edklad i tramvaje, metro, lehk\u00e9 \u017eeleznice a d\u00e1lkov\u00e9 vlaky. Za\u0159\u00edzen\u00ed CAN propojuj\u00ed mj. dve\u0159e, \u0159\u00eddic\u00ed jednotky brzd, jednotky pro po\u010d\u00edt\u00e1n\u00ed cestuj\u00edc\u00edch na r\u016fzn\u00fdch \u00farovn\u00edch s\u00edt\u011b v t\u011bchto vozidlech. CAN se pou\u017e\u00edv\u00e1 tak\u00e9 v letadlech se sn\u00edma\u010di letov\u00e9ho stavu, naviga\u010dn\u00edmi syst\u00e9my a v\u00fdzkumn\u00fdmi po\u010d\u00edta\u010di v pilotn\u00ed kabin\u011b. Krom\u011b toho jsou sb\u011brnice CAN um\u00edst\u011bny v p\u0159\u00edstroj\u00edch letadel a jsou zodpov\u011bdn\u00e9 za anal\u00fdzu dat za letu a tak\u00e9 za \u0159\u00eddic\u00ed syst\u00e9my motor\u016f letadel.      <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-8f711ec\" data-id=\"8f711ec\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-139d512 elementor-widget elementor-widget-image\" data-id=\"139d512\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3-300x300.jpg\" class=\"attachment-medium size-medium wp-image-58586\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3-300x300.jpg 300w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3-1024x1024.jpg 1024w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3-150x150.jpg 150w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3-768x768.jpg 768w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/06960_3.jpg 1080w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Modul s rozhran\u00edm CAN.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<div class=\"elementor-element elementor-element-c91ce1c elementor-widget elementor-widget-text-editor\" data-id=\"c91ce1c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>V\u00fdrobci zdravotnick\u00fdch za\u0159\u00edzen\u00ed pou\u017e\u00edvaj\u00ed CAN jako vestav\u011bnou s\u00ed\u0165 pro zdravotnick\u00e9 p\u0159\u00edstroje. N\u011bkter\u00e9 nemocnice pou\u017e\u00edvaj\u00ed sb\u011brnici k \u0159\u00edzen\u00ed cel\u00fdch opera\u010dn\u00edch s\u00e1l\u016f, kde se ovl\u00e1daj\u00ed nap\u0159\u00edklad sv\u011btla, stoly, kamery, rentgenov\u00e9 p\u0159\u00edstroje a l\u016f\u017eka pacient\u016f. Krom\u011b toho nemocnice pou\u017e\u00edvaj\u00ed protokol CANopen k propojen\u00ed a ovl\u00e1d\u00e1n\u00ed zdvihac\u00edch za\u0159\u00edzen\u00ed, jako jsou panely, ovlada\u010de, dve\u0159e a sv\u011bteln\u00e9 z\u00e1vory. CANopen se pou\u017e\u00edv\u00e1 i v nepr\u016fmyslov\u00fdch odv\u011btv\u00edch, jako jsou laboratorn\u00ed za\u0159\u00edzen\u00ed, sportovn\u00ed kamery, teleskopy, automatick\u00e9 dve\u0159e a dokonce i k\u00e1vovary.   <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c30255b elementor-widget elementor-widget-heading\" data-id=\"c30255b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sb\u011brnice CAN - kterou zvolit?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-45d8865 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"45d8865\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 elementor-inner-column elementor-element elementor-element-8e5d678\" data-id=\"8e5d678\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-726defd elementor-widget elementor-widget-image\" data-id=\"726defd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"676\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/02452_1a-1024x865.jpg\" class=\"attachment-large size-large wp-image-58587\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/02452_1a-1024x865.jpg 1024w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/02452_1a-300x253.jpg 300w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/02452_1a-768x649.jpg 768w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2021\/12\/02452_1a.jpg 1080w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9b003b elementor-align-center elementor-widget elementor-widget-button\" data-id=\"c9b003b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"\/733-magistrala-can\" target=\"_blank\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">POD\u00cdVEJTE SE NA<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-66 elementor-inner-column elementor-element elementor-element-ae5b183\" data-id=\"ae5b183\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d365e8d elementor-widget elementor-widget-text-editor\" data-id=\"d365e8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>V\u00fdb\u011br spr\u00e1vn\u00e9ho za\u0159\u00edzen\u00ed z\u00e1vis\u00ed na jeho zam\u00fd\u0161len\u00e9m pou\u017eit\u00ed. S\u00e9riov\u00e9 komunika\u010dn\u00ed sb\u011brnice, jako je CAN, mohou podporovat palubn\u00ed syst\u00e9m ABS, \u0159\u00edzen\u00ed motor\u016f v projektech pokro\u010dil\u00e9 elektroniky a robotiky a v automatizaci v \u0161ir\u0161\u00edm slova smyslu, nap\u0159\u00edklad v tandemu s nepostradateln\u00fdm <a href=\"\/producent\/89-arduino\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"internal\">Arduino<\/a>.  <\/p>\n<p>Moduly a p\u0159ekryvn\u00e9 moduly CAN, kter\u00e9 jsou k dispozici v sortimentu prodejny Botland, ji\u017e maj\u00ed pot\u0159ebn\u00e9 konektory nebo schopnost OBD pro provoz. Z tohoto d\u016fvodu jsou ide\u00e1ln\u00edmi za\u0159\u00edzen\u00edmi pro ty, kte\u0159\u00ed se zab\u00fdvaj\u00ed mechanikou nebo mechatronikou.  <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Za\u017e\u00edvaj\u00ed sb\u011brnice CAN renesanci? Ne tak docela, proto\u017ee ve skute\u010dnosti se nikdy nepou\u017e\u00edvaly. Pod\u00edvejte se, jak p\u0159esn\u011b vypadaj\u00ed jejich technologick\u00e9 specifikace a k \u010demu se pou\u017e\u00edvaj\u00ed.   <\/p>\n","protected":false},"author":21,"featured_media":63538,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[548,549],"tags":[],"class_list":["post-87955","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika-cs","category-kompendium-cs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Sb\u011brnice CAN - Co je to a jak funguje? - Botland<\/title>\n<meta name=\"description\" content=\"Kompendium znalost\u00ed o sb\u011brnic\u00edch CAN - nav\u0161tivte blog Botland, kde se dozv\u00edte v\u00edce a vyu\u017eijte nab\u00eddky internetov\u00e9ho obchodu Botland.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/botland.cz\/blog\/sbernice-can-co-je-to-a-jak-funguje\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sb\u011brnice CAN - Co je to a jak funguje? 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