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RDM Interpretation Questions Discussion and questions relating to interpreting and understanding the E1.20 RDM Standard.

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Old August 19th, 2011   #1
eldoMS
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Default Interpretation of ACK_TIMER

Hello,

Is it correct that a 0x0000 as an ACK_TIMER response indicates a "come back immediately for the requested and queued data"?

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Marc
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Old August 19th, 2011   #2
ericthegeek
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Yes, that is correct.
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Old August 19th, 2011   #3
sblair
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I have to ask though, if you are ready immediately then why ACK_TIMER?
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Old August 19th, 2011   #4
ericthegeek
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If you need a bit more time than 176us, but don't need the 100ms minimum value allowed in ACK_TIMER. The shortest possible RDM packet is around 1.3ms, so by the time the responder can send you the GET QUEUED_MESSAGE you'll have the data it requested.
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Old August 21st, 2011   #5
eldoMS
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Hi Eric/Scott,

Yes, indeed this can serve quick turn-arounds, even a little bit more than 1.3 ms, depending on the application the ACK_TIMER reply itself (also 1.3 ms) as well as the max delay to response (2 ms) could be added together, of course depending very much on application.

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Marc
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