{"id":3366,"date":"2016-08-10T09:22:59","date_gmt":"2016-08-10T07:22:59","guid":{"rendered":"http:\/\/www.gemac-fieldbus.com\/die-10-can-gebote\/?lang=en"},"modified":"2025-10-27T12:50:04","modified_gmt":"2025-10-27T11:50:04","slug":"the-10-can-commandments","status":"publish","type":"post","link":"https:\/\/alt.gemac-fieldbus.com\/en\/the-10-can-commandments\/","title":{"rendered":"The ten CAN commandments"},"content":{"rendered":"<div id='av_section_1'  class='avia-section av-gc0es6-4f3b987b0a082dcffa04877687dc2ebb main_color avia-section-default avia-no-shadow  avia-builder-el-0  el_before_av_three_fourth  avia-builder-el-first  avia-bg-style-scroll container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><main  role=\"main\" itemprop=\"mainContentOfPage\"  class='template-page content  av-content-small alpha units'><div class='post-entry post-entry-type-page post-entry-3366'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-euagva-e80107b1dece5749399e27a74768f9f1\">\n.flex_column.av-euagva-e80107b1dece5749399e27a74768f9f1{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-euagva-e80107b1dece5749399e27a74768f9f1 av_three_fourth  avia-builder-el-1  el_before_av_one_fourth  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-ji35x84l-1230c4b06850f0a877934891092fe232 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3>The ten CAN commandments<\/h3>\n<ol>\n<li>You shall read the manuals and publications of your components first.<\/li>\n<li>You shall use <a href=\"https:\/\/gemac-fieldbus.com\/en\/shop\/?model_number=KB-03216-01\">CAN cable<\/a> with know parameters (datasheet).<\/li>\n<li>You shall use exactly 2 terminating resistors.<\/li>\n<li>You shall ground your network.<\/li>\n<li>You shall observer maximum lengths of trunk and drop lines. Wise man calculated it, believe\u00a0it.<\/li>\n<li>You shall mount a <a href=\"https:\/\/gemac-fieldbus.com\/en\/canobserver\/\">CANobserver<\/a>, it will warn you on problems before the system breaks down.<\/li>\n<li>You shall avoid closeness\u00a0to electrical jamming sources.<\/li>\n<li>You shall keep distance to high voltages.<\/li>\n<li>You shall avoid high <a href=\"https:\/\/gemac-fieldbus.com\/en\/common-mode\/\">common mode voltages.<\/a><\/li>\n<li>You shall buy a measuring device for the physical layer, therefore you will know how your bus is doing.<\/li>\n<\/ol>\n<p>Even if this sounds funny to you, these are the principles that let your system run hitch-free. Remember while looking for a measurement device that only <a href=\"https:\/\/gemac-fieldbus.com\/en\/fieldbus-diagnosis\/\">GEMAC tools<\/a> are really measuring at the physical layer 1. <strong>Displaying an oscillogram only is not a physical measurement!<\/strong> To rate an oscillogram is hard, even for CAN gurus, how should a now-and-then-user run a chance to find something helpful? No way!<br \/>\nOn the contrary, the GEMAC tools (CANtouch and CAN-Bus Tester 2) not only showing an oscilloscope, they measure the critical values you cannot see and rate them. The general quality level is a mathematical value with shows at a glance how a node is doing.<\/p>\n<p>Experts worldwide say that 95% of errors in fieldbus systems are problems on the physical layer. A fitting testing and measuring device together with the appropriate knowledge is the qualification for a quick and successful troubleshooting.<\/p>\n<p>Why we point out that <a href=\"https:\/\/gemac-fieldbus.com\/en\/canobserver\/\">CANobserver<\/a>? The unit is undervalued &#8211; and yet it is a genius tool to monitor your CAN system. It detects errors and signals them &#8211; without you equipped with your laptop and measuring device. As soon as problems occur, the unit observes and signal it. The unit is not expensive, but if it is still too much, then install a <a href=\"https:\/\/gemac-fieldbus.com\/en\/canalarm\/\">CANalarm <\/a>at the minimum. Then you detect error frames and increased traffic load (clear signals for deeper problems) if they occur and you might have a chance to react before the systems stand still.<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-buul1i-d185f9444ea3e48a078723fd7f3db552\">\n.flex_column.av-buul1i-d185f9444ea3e48a078723fd7f3db552{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-buul1i-d185f9444ea3e48a078723fd7f3db552 av_one_fourth  avia-builder-el-3  el_after_av_three_fourth  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-ba1hg6-9363158dde4f8421e0178650c87fc2f6 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\"><img decoding=\"async\" class=\"alignnone size-full wp-image-2752 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2016\/08\/10_Commandments002.gif\" alt=\"10_Commandments002\" width=\"200\" height=\"232\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 200px; --smush-placeholder-aspect-ratio: 200\/232;\" \/><\/p>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-vj6sm-e958ee3ffc3971bcaf86ec1c7986cb5d\">\n#top .hr.hr-invisible.av-vj6sm-e958ee3ffc3971bcaf86ec1c7986cb5d{\nmargin-top:0px;\nheight:1px;\n}\n<\/style>\n<div  class='hr av-vj6sm-e958ee3ffc3971bcaf86ec1c7986cb5d hr-invisible  avia-builder-el-5  avia-builder-el-no-sibling '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-308 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2016\/04\/CAN.png\" alt=\"CAN\" width=\"167\" height=\"60\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/CAN.png 482w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/CAN-300x108.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/CAN-450x162.png 450w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 167px; --smush-placeholder-aspect-ratio: 167\/60;\" data-original-sizes=\"(max-width: 167px) 100vw, 167px\" \/><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"alignnone wp-image-309 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2016\/04\/Canopen.png\" alt=\"Canopen\" width=\"167\" height=\"60\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/Canopen.png 482w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/Canopen-300x108.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/Canopen-450x162.png 450w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 167px; --smush-placeholder-aspect-ratio: 167\/60;\" data-original-sizes=\"(max-width: 167px) 100vw, 167px\" \/><\/p>\n<p style=\"text-align: center;\"><img decoding=\"async\" class=\"aligncenter wp-image-6783 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2017\/03\/DeviceNet_2016_transp_600x100.png\" alt=\"\" width=\"180\" height=\"30\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2017\/03\/DeviceNet_2016_transp_600x100.png 600w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2017\/03\/DeviceNet_2016_transp_600x100-300x50.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2017\/03\/DeviceNet_2016_transp_600x100-450x75.png 450w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 180px; --smush-placeholder-aspect-ratio: 180\/30;\" data-original-sizes=\"(max-width: 180px) 100vw, 180px\" \/><\/p>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-306 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2016\/04\/J1939.png\" alt=\"J1939\" width=\"167\" height=\"60\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/J1939.png 482w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/J1939-300x108.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/J1939-450x162.png 450w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 167px; --smush-placeholder-aspect-ratio: 167\/60;\" data-original-sizes=\"(max-width: 167px) 100vw, 167px\" \/><\/p>\n<p><img decoding=\"async\" class=\"alignleft wp-image-11599 size-full lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2018\/06\/NMEA2000_transp_120x18-1.png\" alt=\"NMEA2000\" width=\"120\" height=\"18\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 120px; 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Autoclose: 1 -->\n","protected":false},"excerpt":{"rendered":"<p>The ten commandments for CAN paint important basics for hitch-free bus running.<\/p>\n","protected":false},"author":22,"featured_media":3073,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wds_primary_category":0,"footnotes":""},"categories":[62],"tags":[456],"class_list":["post-3366","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-can-en"],"_links":{"self":[{"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/posts\/3366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/comments?post=3366"}],"version-history":[{"count":0,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/posts\/3366\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/media\/3073"}],"wp:attachment":[{"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/media?parent=3366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/categories?post=3366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alt.gemac-fieldbus.com\/en\/wp-json\/wp\/v2\/tags?post=3366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}