{"id":16157,"date":"2019-09-13T14:02:50","date_gmt":"2019-09-13T12:02:50","guid":{"rendered":"https:\/\/gemac-fieldbus.com\/?p=16157"},"modified":"2025-10-27T12:28:51","modified_gmt":"2025-10-27T11:28:51","slug":"cantouch-messung-pegelverhaeltnis","status":"publish","type":"post","link":"https:\/\/alt.gemac-fieldbus.com\/de\/cantouch-messung-pegelverhaeltnis\/","title":{"rendered":"CANtouch &#8211; neue Messung Pegelverh\u00e4ltnis"},"content":{"rendered":"<div id='av_section_1'  class='avia-section av-33k83wd-8b30db614f4de5820ed35d07bfc48a31 main_color avia-section-default avia-no-shadow  avia-builder-el-0  avia-builder-el-no-sibling  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-16157'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-2qk0trx-c00e667c5d74003a0b8a5d681cf70d5f\">\n.flex_column.av-2qk0trx-c00e667c5d74003a0b8a5d681cf70d5f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-2qk0trx-c00e667c5d74003a0b8a5d681cf70d5f av_three_fourth  avia-builder-el-1  el_before_av_one_fourth  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kd73wqbd-188ee51909b426f82542d54fe3e30f11\">\n#top .av-special-heading.av-kd73wqbd-188ee51909b426f82542d54fe3e30f11{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-kd73wqbd-188ee51909b426f82542d54fe3e30f11 .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-kd73wqbd-188ee51909b426f82542d54fe3e30f11 .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<div  class='av-special-heading av-kd73wqbd-188ee51909b426f82542d54fe3e30f11 av-special-heading-h1 blockquote modern-quote  avia-builder-el-2  el_before_av_hr  avia-builder-el-first  av-linked-heading'><h1 class='av-special-heading-tag '  itemprop=\"headline\"  >Softwareversion 2.36 f\u00fcr CANtouch<br \/>\nNeue Messung Pegelverh\u00e4ltnis<\/h1><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br \/>\n<div  class='hr av-qzlmkd-d9da2740bc29eed78bdfd13355f112cf hr-default  avia-builder-el-3  el_after_av_heading  el_before_av_textblock '><span class='hr-inner '><span class=\"hr-inner-style\"><\/span><\/span><\/div><br \/>\n<section  class='av_textblock_section av-jv27ddyt-512248bb46fe25dcfbab5a0c3edab07f '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h2><strong><img decoding=\"async\" class=\"alignleft wp-image-1998 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2016\/06\/Logo-CANtouch-Schein.png\" alt=\"Logo CANtouch Schein\" width=\"139\" height=\"50\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/06\/Logo-CANtouch-Schein.png 500w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/06\/Logo-CANtouch-Schein-300x108.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/06\/Logo-CANtouch-Schein-495x180.png 495w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/06\/Logo-CANtouch-Schein-450x162.png 450w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 139px; --smush-placeholder-aspect-ratio: 139\/50;\" data-original-sizes=\"(max-width: 139px) 100vw, 139px\" \/><\/strong><\/h2>\n<p><img decoding=\"async\" class=\"alignright size-full wp-image-16159 lazyload\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2019\/04\/AppCANLevelsabs.png\" alt=\"\" width=\"57\" height=\"57\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/AppCANLevelsabs.png 57w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/AppCANLevelsabs-36x36.png 36w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/AppCANLevelsabs-45x45.png 45w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 57px; --smush-placeholder-aspect-ratio: 57\/57;\" data-original-sizes=\"(max-width: 57px) 100vw, 57px\" \/>Die neue Softwareversion aus September 2019 kommt mit einem neuen Messwert f\u00fcr den CAN-Bus, dem Pegelverh\u00e4ltnis. Das Pegelverh\u00e4ltnis wird in der Messung \u201eCAN Pegel Absolut\u201c zus\u00e4tzlich angezeigt und steht unabh\u00e4ngig von den erworbenen Lizenzen zur Verf\u00fcgung.<\/p>\n<p>Dieser neue Messwert erleichtert das Erkennen von Kurzschl\u00fcssen und \u00dcbergangswiderst\u00e4nden in der Leitung oder zwischen Leitungen sowie von elektronischen Fehlern in CAN-Knoten.<\/p>\n<p>Die Schwierigkeit beim Erkennen von Problemen mit bestimmten absoluten Spannungspegeln ist, dass \u00e4hnliche Konstellationen auch durch Common Mode entstehen k\u00f6nnen. Es musste also eine M\u00f6glichkeit gefunden werden, zul\u00e4ssige Common-Mode-Verschiebungen von F\u00e4llen eines Kurzschlusses oder \u00dcbergangswiderstandes sicher voneinander zu unterscheiden.<\/p>\n<p>Bisher waren bestimmte Fehler nur indirekt zu erkennen, zum Beispiel der Kurzschluss von CAN_L nach Masse. Das Problem wurde nur im physikalischen Oszilloskop-Bild sichtbar. So konnte auch der Automatische Schnelltest den Bus komplett gut bewerten obwohl eine Leitung fehlerhaft war. Durch den zus\u00e4tzlichen Messwert Pegelverh\u00e4ltnis erkennt das CANtouch solche Fehler nun zuverl\u00e4ssig.<\/p>\n<p><a href=\"https:\/\/static.gemac-fieldbus.com\/2019\/04\/CANtouch_Levelratio_DE_news.png\"><img decoding=\"async\" class=\"alignright wp-image-16172 size-medium lazyload\" title=\"CAN Bus Pegelverh\u00e4ltnis CAN_H\/CAN_L\" data-src=\"https:\/\/static.gemac-fieldbus.com\/2019\/04\/CANtouch_Levelratio_DE_news-300x161.png\" alt=\"CAN Bus Pegelverh\u00e4ltnis CAN_H\/CAN_L\" width=\"300\" height=\"161\" data-srcset=\"https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/CANtouch_Levelratio_DE_news-300x161.png 300w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/CANtouch_Levelratio_DE_news-768x413.png 768w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/CANtouch_Levelratio_DE_news-705x379.png 705w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/CANtouch_Levelratio_DE_news-450x242.png 450w, https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2019\/04\/CANtouch_Levelratio_DE_news.png 940w\" data-sizes=\"auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 300px; --smush-placeholder-aspect-ratio: 300\/161;\" data-original-sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a>Das Pegelverh\u00e4ltnis beschreibt die prozentualen Anteile von CAN_H und CAN_L am Differenzsignal f\u00fcr den dominanten Buszustand. 100% verteilen sich auf die beiden Leitungen CAN_L und CAN_H, wobei eine Verteilung von 50% zu 50% optimal ist.<br \/>\nAbweichungen vom Ideal treten beispielsweise dann auf, wenn \u00dcbergangswiderst\u00e4nde oder Kurzschl\u00fcsse von einer Leitung zur Versorgungsspannung oder Masse auftreten.<br \/>\nDie in manchen Knoten verbauten Transceiver mit 3,3V Spannungsversorgung beeinflussen das Pegelverh\u00e4ltnis negativ, wobei die voreingestellten Bewertungsschwellen so gew\u00e4hlt wurden, dass diese leichte Verschiebung um 5% noch keinen Fehler signalisiert.<\/p>\n<p>Wie beim CANtouch \u00fcblich lassen sich auch bei dieser Messung die Bewertungsgrenzen in der Datei <em>cantouch.property.rating.xml<\/em> projektbezogen einstellen. Die Voreinstellung bewirkt die Ausgabe einer Warnung wenn der Anteil einer der Leitungen unter 30% sinkt. Als Fehler wird ein Wert unter 20% gewertet.<\/p>\n<\/div><\/section><\/p><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-28hmwjh-eb2e7d3adcc2c271402b4f3478fb51ce\">\n.flex_column.av-28hmwjh-eb2e7d3adcc2c271402b4f3478fb51ce{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-28hmwjh-eb2e7d3adcc2c271402b4f3478fb51ce av_one_fourth  avia-builder-el-5  el_after_av_three_fourth  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-jv27dlok-6f8899ec11b8bfe34811a757c31ec873 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><p style=\"text-align: center;\">September 2019<\/p>\n<\/div><\/section><br \/>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1i3f325-267cbfc0cc97e56ff2a1f11253e8c4a3\">\n.avia-image-container.av-1i3f325-267cbfc0cc97e56ff2a1f11253e8c4a3 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-1i3f325-267cbfc0cc97e56ff2a1f11253e8c4a3 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div  class='avia-image-container av-1i3f325-267cbfc0cc97e56ff2a1f11253e8c4a3 av-styling- avia-align-center  avia-builder-el-7  el_after_av_textblock  el_before_av_image '   itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\" ><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img class='avia_image lazyload' data-src='https:\/\/alt.gemac-fieldbus.com\/wp-content\/uploads\/2016\/04\/cantouch_500width.jpg' alt='CANtouch Hand' title='cantouch_500width'  height=\"333\" width=\"500\"  itemprop=\"thumbnailUrl\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 500px; 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