what happen when CANH and CANL wrong connection

Discussion in 'Embedded Systems and Microcontrollers' started by ep.hobbyiest, Jul 21, 2015.

  1. ep.hobbyiest

    Thread Starter Member

    Aug 26, 2014
    91
    0
    Hi
    what will happen if i connect CANH to CANL and CANL to CANH.
    will it CAN bus will work in this condition?
    or that node will go in busoff state?
     
  2. JohnInTX

    Moderator

    Jun 26, 2012
    2,338
    1,019
    The miswired node would probably see enough errors that it would kick itself off the bus but I wouldn't count on it.
     
  3. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    When you miswire it in that way, what should be a dominant bit actually looks like a recessive bit to the receiving node so it won't throw a bit error and the transmitting node won't throw a bit error so the transmitting node might conclude that it is lonely and retry the transmission forever.
     
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