{"id":76696,"date":"2020-07-21T14:11:48","date_gmt":"2020-07-21T12:11:48","guid":{"rendered":"https:\/\/gemac-fieldbus.com\/problems-with-the-usb-connection-at-the-cbt2\/"},"modified":"2025-10-27T12:48:32","modified_gmt":"2025-10-27T11:48:32","slug":"problems-with-the-usb-connection-at-the-cbt2","status":"publish","type":"post","link":"https:\/\/alt.gemac-fieldbus.com\/en\/problems-with-the-usb-connection-at-the-cbt2\/","title":{"rendered":"Problems with the USB connection at the CBT2"},"content":{"rendered":"<div id='av_section_1'  class='avia-section av-1zjkoz4-47be02d1bcad7fe941242887aa292b35 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-76696'><div class='entry-content-wrapper clearfix'>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1oldlcg-682c20c06ec29469f7ac68183c691ddc\">\n.flex_column.av-1oldlcg-682c20c06ec29469f7ac68183c691ddc{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-1oldlcg-682c20c06ec29469f7ac68183c691ddc av_two_third  avia-builder-el-1  el_before_av_one_third  avia-builder-el-first  first flex_column_div av-zero-column-padding  '     ><section  class='av_textblock_section av-kcvqdcpd-08451fa5de8172e68304e9abdc00ed88 '   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h3>Problems with the USB connection on the CBT2<\/h3>\n<p>Errors that occur can have the following effects, among others:<\/p>\n<ul style=\"list-style-type: square;\">\n<li>The node list only partially created<\/li>\n<li>Uncontrolled termination of measurements<\/li>\n<li>Protocol monitor stops<\/li>\n<li>Tester disappears from the status bar and is recognized shortly afterward<\/li>\n<\/ul>\n<p>With the key combination Ctrl-Alt-O, you can open the debug window. You may find hints for a faulty USB connection there. Typical error messages are:<\/p>\n<pre>[USB] Main - Command-Laenge ungueltig, Size = 1, SizeInv = 65535\r\n[USB] Main - Command-CRC-Fehler, CID = 0x02, CRC = 0x0103, Size = 0<\/pre>\n<p><strong>USB connection problems between PC and CAN-Bus Tester 2 can have various causes.<\/strong><\/p>\n<p>Please check the tester with another USB cable. The original USB cable from the case is a high quality certified cable. Low-cost cables from discounters cannot replace it.<br \/>\nUSB extensions can cause problems and should generally avoid.<br \/>\nIf possible, test the CBT2 on another computer. If the problems do not occur there, you must look for a solution at the problematic machine. For example, try a different USB port or connect a USB hub between the computer and the tester.<br \/>\nTiming problems in the galvanic isolation of the USB port in connection with older software versions led to stability problems of the USB connection. Please use a software version from 4.7.8.2 with a modified timing of the USB connection.<br \/>\n<head>\n    <style type=\"text\/css\">\n        .version-lists {\n            border-spacing: 0px 0px;\n            border-collapse: collapse;\n            height: 0px;\n            margin-bottom: 0px;\n        }\n\n        \/* .version-lists tr { height: 0px; } *\/\n        .version-lists td {\n            border: 1px solid white;\n            height: 0px;\n            vertical-align: middle;\n        }\n\n        #top .version-lists .download-versions {\n            margin-bottom: 0px;\n        }\n    <\/style>\n<\/head>\n    <table class=\"version-lists\" with=230px>\n        <tr>\n            <td>\n                <select class=\"download-versions\" onchange=\"Display4724(this.value)\">\n                                            <option value=\"https:\/\/alt.gemac-fieldbus.com\/en\/download\/4724\/?tmstv=1779748366\" selected='selected'>\n                            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                   <option value=\"https:\/\/alt.gemac-fieldbus.com\/en\/download\/4724\/?tmstv=1779748366&#038;version=4-7-0-1\" >\n                            4.7.0.1&nbsp;&nbsp;&nbsp;27-10-2017                        <\/option>\n                                            <option value=\"https:\/\/alt.gemac-fieldbus.com\/en\/download\/4724\/?tmstv=1779748366&#038;version=4-6-7-1\" >\n                            4.6.7.1&nbsp;&nbsp;&nbsp;15-08-2017                        <\/option>\n                                            <option value=\"https:\/\/alt.gemac-fieldbus.com\/en\/download\/4724\/?tmstv=1779748366&#038;version=4-6-6-0\" >\n                            4.6.6.0&nbsp;&nbsp;&nbsp;14-12-2016                        <\/option>\n                                            <option value=\"https:\/\/alt.gemac-fieldbus.com\/en\/download\/4724\/?tmstv=1779748366&#038;version=4-5-5-2\" >\n                            4.5.5.2&nbsp;&nbsp;&nbsp;02-11-2015                        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<\/script>\n<\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-12lnd3k-81e9670dffdaff06370bb684d364058f\">\n.flex_column.av-12lnd3k-81e9670dffdaff06370bb684d364058f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-12lnd3k-81e9670dffdaff06370bb684d364058f av_one_third  avia-builder-el-3  el_after_av_two_third  avia-builder-el-last  flex_column_div av-zero-column-padding  '     ><div  class='avia-builder-widget-area clearfix  avia-builder-el-4  avia-builder-el-no-sibling '><div id=\"rpwe_widget-13\" class=\"widget clearfix rpwe_widget recent-posts-extended\"><style>.rpwe-block ul{\r\nlist-style: none !important;\r\nmargin-left: 0 !important;\r\npadding-left: 0 !important;\r\n}\r\n\r\n.rpwe-block li{\r\nborder-bottom: 1px solid #eee;\r\nmargin-bottom: 10px;\r\npadding-bottom: 10px;\r\nlist-style-type: none;\r\n}\r\n\r\n.rpwe-block a{\r\ndisplay: inline 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both;\r\n}\r\n\r\n.rpwe-clearfix{\r\nzoom: 1;\r\n}\r\n<\/style><h3 class=\"widgettitle\"><a href=\"https:\/\/gemac-fieldbus.com\/en\/faq\/\" title=\"Back to FAQ overview\">Back to FAQ overview<\/a><\/h3><div  class=\"rpwe-block\"><hr>\r\n<h3>FAQ about the CAN-Bus Tester 2<\/h3><ul class=\"rpwe-ul\"><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/50-60-hz-ripple-when-the-tester-is-connected\/\" target=\"_self\">50\/60 Hz ripple when the tester is connected<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/assignment-of-d-sub9-socket-on-cantouch-and-can-bus-tester-2\/\" target=\"_self\">Assignment of D-Sub9 socket on CANtouch and CAN-Bus Tester 2<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/can-bus-wiring-test\/\" target=\"_self\">CAN bus wiring test<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/can-symboleditor-manual\/\" target=\"_self\">CAN Symboleditor Manual<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/canbusview-xl-iii-can-quick-tester-c-qt15-and-devicenet-analyzer\/\" target=\"_self\">CANBUSview XL III, CAN Quick Tester C-QT15 and DeviceNet Analyzer<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/canopen-protocol-monitor-vs-canopen-bus-system\/\" target=\"_self\">CANopen protocol monitor vs. CANopen bus system<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/cantouch-vs-can-bus-tester-2-the-decision\/\" target=\"_self\">CANtouch vs. CAN-Bus Tester 2, the decision<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/common-mode-measurement\/\" target=\"_self\">Common Mode Measurement<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/connection-between-firmware-fpga-pc-software-cbt2-does-not-measure\/\" target=\"_self\">Connection between firmware &#8211; FPGA &#8211; PC software (CBT2 does not measure)<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/errorframes-which-node-sent-the-message\/\" target=\"_self\">Errorframes: which node sent the message<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/exchange_service\/\" target=\"_self\">Exchange service for fieldbus diagnostic devices<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/how-to-load-a-new-license-file\/\" target=\"_self\">How to load a new license file<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/file-with-additional-baud-rate\/\" target=\"_self\">How to use a file with an additional baud rate<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/import-of-cantouch-trace-data\/\" target=\"_self\">Import of CANtouch trace data<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/licenses-of-the-protocol-monitor-are-not-recognized\/\" target=\"_self\">Licenses of the protocol monitor are not recognized<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/on-led-flashes-yellow-no-function-not-recognized-by-pc\/\" target=\"_self\">ON-LED flashes yellow, no function, not recognized by PC<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/problems-with-the-usb-connection-at-the-cbt2\/\" target=\"_self\">Problems with the USB connection at the CBT2<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/sae-j1939-custom-pgn-decoding\/\" target=\"_self\">SAE J1939 custom PGN decoding<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/send-list-move-message-into-sequence\/\" target=\"_self\">Send list: move message into sequence<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/tester-shows-non-existend-error-frames\/\" target=\"_self\">Tester shows non existend error-frames<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/trigger-dso-with-the-cbt2\/\" target=\"_self\">Trigger DSO with the CBT2<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/triggeroutput-cbt2\/\" target=\"_self\">Trigger Output CBT2<\/a><\/h3><\/li><li class=\"rpwe-li rpwe-clearfix\"><h3 class=\"rpwe-title\"><a href=\"https:\/\/alt.gemac-fieldbus.com\/en\/which-cantouch-firmware-fits-to-which-can-bus-tester-2-software\/\" target=\"_self\">Which CANtouch-Firmware fits to which CAN-Bus Tester 2 Software ?<\/a><\/h3><\/li><\/ul><\/div><!-- Generated by http:\/\/wordpress.org\/plugins\/recent-posts-widget-extended\/ --><\/div><\/div><\/div><\/div><\/div><\/main><!-- close content main element --><\/div><\/div><div id='after_section_1'  class='main_color av_default_container_wrap container_wrap sidebar_right'  ><div class='container av-section-cont-open' ><div 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