can_faq_erors - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-23T10:30:07+00:00

CAN Errors / CAN Error States What are Error Active, Error Passive, and Bus off of CAN Bus? Just to give a little background to the answer: In order to prevent malfunctioning nodes from disturbing, or even blocking, an entire system, the CAN protocol implements a sophisticated fault confinement mechanism. The CAN protocol is intended to be orthogonal, i.e. all nodes address faults in the same manner. Fault confinement is provided where each node constantly monitors its performance with regard…

can_faqlinks - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-23T02:51:09+00:00

CAN FAQs (and answers) in the net There are not only the FAQ list on this web site but a lot more spread all over the net. If you find one, and it is worth, put a link here or drop the admin a note. * CAN FAQ at the university of Warwick UK (old) *

can_bus_off - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-22T16:24:26+00:00

CAN Bus-Off condition/ state BusOff is an error state of the CAN Controller. Only the transmitter can switch in the state BusOff, if the Transmit Error Counter exceeds 255. (more details needed on this place) In real life a CAN controller can switch in the mode ErrorPassive sporadic. But the mode BusOff is a critical error and should never arrive without a hardware error or an other critical error.

what_is_wrong_with_rtr - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-21T08:56:32+00:00

Why using RTRs is not advised? RTR means Remote Transmission Request - a CAN frame requesting another node to send a requested frame. CiA, especially the Special Interest Group CANopen is not recommending using RTR Messages. You may ask: why? The CiA has a paper explaining the contras and giving advice for better solutions. CiA AN 802 V1.0: CANopen statement on the use of RTR-messages It can be downloaded free of charge after a registration at

can_faq_blowuprs232 - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-20T10:03:27+00:00

Can CAN blow up RS232 transceivers Christian Schlegel wrote Yes it can! Perhaps the CAN trasceiver 82C250 is used on the I/O module. This transceiver is only able to sustain a voltage of -8V to +18V at CAN_H and CAN_L. On a RS232 you have -12V to +12V. Using the CAN transceiver 82C251 gives more immunity because this transceiver can sustain a voltage of -36V to +36V at CAN_H and CAN_L and the price of this chip is quite the same as for the 82C250.

can_message_filtering - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-18T22:21:01+00:00

What is CAN Message Filtering The two most common terms used are accceptance mask and acceptance code. Let's see how Allen Pothoof explains this: In an ideal world, you would have a filter for each message you wanted to receive. That would allow you to reject any messages you aren't interested in. But we don't live in a perfect world. If you don't have enough filters, you have to

can_connectors - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-17T00:06:43+00:00

CAN Connectors CiA Standard CiA303-1 lists more than 20 different connectors and there pinning. * Dsub-9 most often used male and female connectors * em069A-3, this 3-pin connector from China is dedicated to low-cost devices for cheap equipment.

who_is_who - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-16T12:43:33+00:00

Who is Who in CAN Who is Who ? Fortunately not all the important persons are presented by pictures, but only by papers. Here are some. Feel free to add if you know someone. Ask for permission before posting or use public available portrait pictures.

nmea200 - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-16T10:56:24+00:00

NMEA 2000 NMEA 2000 is a communication protocol based upon the SaeJ1939 Controller Area Network standard from the National Marine Electronics Association to interconnect various electronic units onboard ships and smaller recreational and commercial vessels. NMEA 2000 The development of this standard began in 1994. It was released in 2001 The standard NMEA 2000(R) is a low-cost serial data network operating at 250 kbits/s based on CAN substituting NMEA0183.

can_cabling - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-16T07:06:53+00:00

CAN cabling Some rules on how to design a CAN network. Consider reading Problem Solving Questions. The rules are general and valid for an CAN network including CANopen and Devicenet. Therefore look at Device Net Cable too. * Always use twisted pairs for CAN_H and CAN_L. * Several manufacturers offer also four twisted cables for CAN when using 4-wire construction. This makes cable thinner and enables moulding of 2x2x0.5mm2 into e.g. M12-connectors

can_faq_basic_full - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-16T06:38:36+00:00

Difference between Basic and Full CAN Initially there was only one “CAN controller”, which was designed to have some amount of object buffers. This was the now deceased Intel 82526 (up to 5 message buffers). It was followed by the 82527 with 15 message buffers. Then Philips tried to cut cost to produce a even cheaper version, hence 82C200 which has two receive buffers and one transmit buffer, and of course the partial mask-match filtering as well. In order to differentiate between these two CAN…

can_higher_layer_protocols - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-16T05:37:17+00:00

CAN Higher Layer Protocols * CANopen * DeviceNet * SDS

problem_solving_questions - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-15T04:27:26+00:00

Problem Solving Questions Why is my CAN not working ? Here are some Problem Solving Questions This page should help you to find out why your network is not working by providing questions. Answering these questions should help to find out what is possibly going wrong.

can_faq - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-14T14:10:45+00:00

CAN Frequently Asked Questions This CAN_FaqLinks page contains a collection of other FAQs on the web. * What is CAN? * try to answer it here or see * What is the future of CAN ? * CAN with flexible data rate - CAN FD - was introduced by Bosch in March 2012 on the 13th international CAN Conference

can_fd - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-14T13:34:50+00:00

CAN with flexible Data Rate improved CAN More than 20 years after introducing CAN, communication requirements have increased and CAN has reached it's bandwidth limits in some application fields. To improve CAN regarding bandwidth Bosch has specified the

duplicate_mac_id - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-14T13:09:59+00:00

DeviceNet Duplicate MAC ID Protocol Summary In the following explanation “Dup MAC Request/Response” means a Duplicate MAC ID Request/Response message at the same MAC ID as the node being described. Power-up * Transmit Dup MAC request message

can_transceivers - [Texas Instruments]

heinz (heinz@undisclosed.example.com) — 2026-08-14T12:22:08+00:00

CAN Transceivers The CAN transceiver has two tasks: * Receiving: it adapts signal levels from the bus, to levels that the CAN Controller expects and has protective circuitry that protect the CAN Controller * Sending: it converts the transmit-bit signal received from the CAN Controller into a signal that is sent onto the bus

whatiswrongwithrtr - removed - external edit (Unknown date)

Anonymous (anonymous@undisclosed.example.com) — 2026-08-14T12:21:50+00:00

Why using RTRs is not advised in CANopen? CiA, especially the Special Interest Group CANopen is not recommending using RTR Messages. You may ask: why? The CiA has a paper explaining the contras and giving advice for better solutions. CiA 802 V1.1.0: CANopen application note - CAN remote frames: Avoiding of usage (IGCO_802v01010000.pdf)

ctucanfd - [CTU CAN FD]

pavelpisa (pavelpisa@undisclosed.example.com) — 2026-03-27T10:47:16+00:00

CTU - Czech Technical University in Prague There are many CAN bus related project implemented at the Faculty of Electrical Engineering of the Czech Technical University in Prague CTU CAN FD CTU CAN FD is a soft IP core whose development started at Czech Technical University. The core is usable in FPGA and ASIC implementations. It supports ISO and NON-ISO versions of CAN FD protocol and it is compliant with ISO 11898-1 2015. The core is open-source, see the licensing conditions on project pa…

dw-backup-20200928-115416.tar.bz2 - removed

heinz (heinz@undisclosed.example.com) — 2022-11-09T10:50:25+00:00

CAN Wiki