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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 January 16th, 2007   #1
prwatE120
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Default Max Value for 32bit Timers

Are we agreed that the data in the 32bit Hours/Lamp/Lamp Strike counters is unsigned ? ie max value is 0xFFFFFFFF ?

As far as I can see we do not explicitly state this anywhere in the document - apologies if I have missed it.

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Peter Willis
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Old January 16th, 2007   #2
Javid Butler
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Yes. I can't think of any situation where there would be negative lamp hours, and anything other than an unsigned integer would only lead to confusion.
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Old January 19th, 2007   #3
sblair
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Yes, everything should be unsigned values so that the max value should be 0xFFFFFFFF.

It would also be a good idea for these type fields to not roll over if they exceed the 0xFFFFFFFF value and instead just remain at that Max value.
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Old January 20th, 2007   #4
prwatE120
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Just a note that this was discussed at the Jan 19th 2007 Task group meeting in Dallas and that Scott's response reflected the consensus of the group at that time.

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