CRC error in CAN networks

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CRC error in CAN networks

by Luca Bolognino :: Rate this Message:

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Hello,

I'm analyzing different failures in a CAN network, and I have a problem with the CRC error.

What will occur if a node (in the transmission case) has a faulty check sum generator?

Is the following scenario correct?

1)The node 5 (with a faulty check sum generator) sends one message, but all other nodes will recognize a CRC error and they will send an error active frame until they will reach the error passive mode. During this phase node 5 will not increment TEC and it will continue to retransmit the message.
2)As soon as the other nodes enter in the error passive mode, no node will acknowledge the message of node 5 and it will keep retransmitting the message, by incrementing every time its TEC until the node will reach the error-passive mode.
3)The node will continue to retransmit the message, and nodes with ID>5 will not be able to transmit any message (since they will alway lose arbitration against node 5).

Thank you.
Regards,

Luca

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