{"id":5024,"date":"2026-07-30T14:20:52","date_gmt":"2026-07-30T12:20:52","guid":{"rendered":"https:\/\/w3.ime-actia.de\/vehicle-diagnostics\/can-fd\/"},"modified":"2026-08-10T12:48:46","modified_gmt":"2026-08-10T10:48:46","slug":"can-fd","status":"publish","type":"page","link":"https:\/\/www.ime-actia.de\/en\/vehicle-diagnostics\/can-fd\/","title":{"rendered":"CAN-FD"},"content":{"rendered":"\n
<\/i>Back to Vehicle Diagnostics<\/a><\/div><\/div><\/div><\/div><\/div>\n\n

CAN-FD – ISO 11898-1<\/h2>\n\n

Following the widespread adoption of the CAN bus <\/strong>throughout the automotive industry, it became clear that the current diagnostic communication system required greater data volume and speed<\/strong>. For this reason, Robert Bosch GmbH introduced CAN-FD in 2012. The abbreviation FD stands for ‘flexible data rate’<\/strong> and is specified in ISO 11898-1. Key changes include expanding the payload field from 8 bytes to up to 64 bytes per frame<\/strong> and increasing the data rate from a maximum of 1 Mbit\/s to 8 Mbit\/s<\/strong>. CAN-FD therefore places significantly higher demands on the processing speed of ECUs and is typically used by newer, high-performance ECUs<\/strong>. <\/p>\n\n

The CAN-FD standard is backward compatible<\/strong> with the conventional CAN standard. For example, both normal (11-bit) and extended (29-bit) addressing are supported for the identifier. <\/p>\n\n

Comparison of CAN and CAN FD<\/h3>\n\n
\"\"<\/figure>\n\n

The distinction between CAN and CAN-FD frames is made using one of the \u201cReserved\u201d bits in the control field, the FDF bit (FD Frame). If this bit is set, the following frame is interpreted as a CAN-FD frame. In this case, the second data rate is used to transmit the payload data using the newly introduced BRS (Bit Rate Switch). <\/p>\n\n

The data rate is set using the DLC field:<\/strong><\/p>\n\n

No. of data bytes<\/td>DLC3<\/td>DLC2<\/td>DLC1<\/td>DLC0<\/td><\/tr>
0..8<\/td>as classical CAN<\/td><\/tr>
12<\/td>rezessive<\/td>dominant<\/td>dominant<\/td>rezessive<\/td><\/tr>
16<\/td>rezessive<\/td>dominant<\/td>rezessive<\/td>dominant<\/td><\/tr>
20<\/td>rezessive<\/td>dominant<\/td>rezessive<\/td>rezessive<\/td><\/tr>
24<\/td>rezessive<\/td>rezessive<\/td>dominant<\/td>dominant<\/td><\/tr>
32<\/td>rezessive<\/td>rezessive<\/td>dominant<\/td>rezessive<\/td><\/tr>
48<\/td>rezessive<\/td>rezessive<\/td>rezessive<\/td>dominant<\/td><\/tr>
64<\/td>rezessive<\/td>rezessive<\/td>rezessive<\/td>rezessive<\/td><\/tr><\/tbody><\/table>
Encoding of the FD data rate for the data in the DLC field<\/em><\/figcaption><\/figure>\n\n
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\"ACTIA<\/figure>\n<\/div>\n\n\n\n
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CAN-FD – ISO 11898-1 Following the widespread adoption of the CAN bus throughout the automotive industry, it became clear that […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2227,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_eb_attr":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-5024","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/pages\/5024","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/comments?post=5024"}],"version-history":[{"count":3,"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/pages\/5024\/revisions"}],"predecessor-version":[{"id":5029,"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/pages\/5024\/revisions\/5029"}],"up":[{"embeddable":true,"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/pages\/2227"}],"wp:attachment":[{"href":"https:\/\/www.ime-actia.de\/en\/wp-json\/wp\/v2\/media?parent=5024"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}