Re: [Bacnet-developers] Read-Property questions

[Н. Ј. <nik...@eu...>]

Hi,

I haven't seen in stadard nor in bacnet stack that the object list for device 
actually contains device object id. Can you point me to the resource which 
clarifies this issue?

Best regards,
Nikola Jelic

On Thursday, 29. September 2011. 12.07.41 Henrik Johansson Ekdahl wrote:
> Hi!
> 
> Clarification for question 2:
> 
> The object list shall always contain the device object itself. I.e. it can
> never be empty.
> 
> Best regards
> 
> Henrik Ekdahl
> 
> ________________________________________
> From: lar...@wa... [lar...@wa...]
> Sent: 29 September 2011 11:47
> To: bac...@li...
> Subject: Re: [Bacnet-developers] Read-Property questions
> 
> Hello Nikola,
> 
> > 1. When we request the device with magic number 0x3fffff, we
> > should automatically select any device. If I understand
> > correctly, the response whould contain the real device id,
> > not the one with 0x3fffff, but the response from bacnet stack
> > gives back magic number. Which behaviour is correct?
> 
> The real device id is correct (although the standard imo does
> word it differently).
> 
> > 2. In theory, if we have an empty object list on device (or
> > empty address binding list), how do we encode it? Should we
> > put NULL value as response, or just close tags?
> 
> Just opening and close tags without content. NULL is a value and
> not no value. Also note, that there are optional lists in some
> services, like CreateObject - there you encounter a "missing list"
> and an "empty list" and both have their unique encoding.
> 
> Best regards,
> Lars Friedrich
> 
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