101Re: Feedback DMF-011
- Aug 9, 2006Hi Steve,
please find my comments below ...
--- In BACnetLighting@yahoogroups.com, Steve Karg <steve@...> wrote:
> > o Auto_Off_Delay (REAL, seconds) Auto_Off_Priority (Unsigned): If
> > Auto_Off_Delay is set to a value greater 0, any Present_Value
> > a priority equal or lower than Auto_Off_Priority automatically
> > relinquishes after Auto_Off_Delay seconds. This feature is used for
> > staircase lighting (at least in Europe).
> > o On_Delay (REAL, seconds) Off_Delay (REAL, seconds): If the
> > Present_Value is changed from 0 to some value greater than zero or
> > versa the dim action is delayed for the time given in these
> > - A Dim_Mode property ("Ramp" or "Fade") could select the dim mode
> > when the value is changed via the Present_Value property. This would
> > allow controller with no specific support for the Lighting Object to
> > control it like a simple Analog Output object.
> We had discussed having the Present_Value behave in the manners that
> describe, but decided against it since those features could be created
> using the Lighting_Command. Any device that can control the
> Present_Value of the Lighting Output object *should* be able to control
> it using the Lighting_Command enumeration. In other words, if the
> device knows about the new object type, it would also know about the
> properties of the object. This was also discussed at the SSPC-135
> BACnet committee.
Does this comment also relate to the auto-off and the delay features?
> The same could be said about the DALI scenes.
I implemented the DALI scenes using multi-state output objects. Each
object is assigned to a DALI group. The states are "Recall scene x" (x
= 0 to 15), "Store scene x", and "Remove scene x". Now, if the
multi-state output object assigned to group 3 is set to recall scene 4
the DALI command recall scene 4 is sent to group 3.
> > BTW, are there any plans for a BACnet Constant Light Controller
> I am not sure what Constant Light Controller means. If it means
> relay-based lighting, there is another proposal, DMF-019, that adds
> blink warn and timeout to the Binary objects. There have been other
> proposals to add automatic relinquish, but those have been dropped for
> now in favor of the Lighting Output object.
A constant light controller keeps the luminosity of a room constant.
For this purpose it uses the input of a luminosity sensor and
controlls the room lights accordingly.
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