Why Extended Identifiers !?

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este00
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Why Extended Identifiers !?

Post by este00 » 2006 Feb 12 19:10

So..... Chrysler CAN uses the 29bit ID right ? The thing is, they never go over address 0x7FF........ Which is the 11bit ID range.

So why use extended identifiers when your only going to use the standard range ?

Maybe lets suppliers have the option of adapting thier other hardware over to dcx systems w/o having to recode the ids ?

One thing is 29bit does create a much larger arbitration field.


Anyone have any ideas ?

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linuxkidd
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Post by linuxkidd » 2006 Feb 12 20:03

On CAN-B, they use 11bit IDs... maybe they use the 29bit on the higher speed networks??

LK
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este00
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Joined: 2005 Dec 05 20:07

Post by este00 » 2006 Feb 12 21:34

I could have swore I remember Chrysler using 29bit ids...... But I must be wrong.

I'm sure CAN-C and B are the same for ID's since some devices use both layers, doesnt make sense to have them switch ID length around.

It would make sense that I'm wrong. How about that!

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