Re: Norfolk Meeting
- Hello BACnet Lighting Working Group!
We met at Little Creek Naval Amphibious Base in Norfolk, VA, from
8am-noon on Monday, September 26, 2005. Here are the minutes from the
BACnet - Lighting Applications Working Group
Participants - Affiliation
Steve Karg - Lithonia Lighting
Robert Hick - Leviton Lighting
David Fisher - Polarsoft
Steve Treado - NIST
Steve Jurasek - Applied Control Specialists
Dick Chipchak - Applied Control Specialists
The meeting was called to order at 8:30am. A timekeeper (Steve
Treado) and a scribe (Robert Hick) were assigned. Dick Chipchak was
volunteered to track the non-agenda items. The previous meeting
minutes were reviewed and approved. The meeting agenda was reviewed .
Steve Karg noted that he added "A color property in the Lighting
Output Object" to the agenda. Agenda was approved as ammended.
Robert Hick reported on NEMA DALI activity:
NEMA Joint Sections Committee on DALI has received several comments
back on NEMA 243 DALI Protocol and is currently discussing and
integrating changes into the document.
The NEMA Lighting Controls Section is meeting 9/28 . One item on the
agenda will be to approve funding for the Verification and
Demonstration of DALI 243. It is expected to pass and has strong
support from the controls and ballast communities.
Initial response indicates COMEX Project Team members may not
integrate NEMA 243 into IEC 62386. NEMA is expected to continue to
promote NEMA 243 for US and North America.
Robert also noted that Zigbee is now showing up in commercial ballasts
and control devices as a wireless protocol.
LA-WG proposal discussion:
DMF032-4/5 WriteGroup Service
David Fisher described changes he had made to this proposal,
Added GroupChannelGeneralValue to encompass additional data types if
desired and still preserve the simplicity and efficiency of the
smaller data types. Null value is relinquish.
Add optional property for Transition Time.
It was moved that this proposal be sent up to the SSPC for
consideration, the motion was carried. A brief discussion ensued about
the status of the other proposals, it was noted that most were on the
docket for the next SSPC meeting.
Robert Hick presented a paper describing room combining and examples
for using the newly proposed WriteGroup and WriteGroupMode services.
David asked if BACnet devices needed to have visibility to the
contents of a "preset". It was decided to hold this
A discussion about dynamic group membership and means to accomplish it
It was decided that a property should be added to the control group
object to read and write the group membership. It was decided that
and array would be the best choice.
David Fisher agreed to try to make these revisions to both DMF-30 and
DMF-32 prior to the SSPC meeting discussion.
A color property in the Lighting Output Object
Steve Karg presented a case whereby there was a need to add color
control to the light object. Steve's example was a fixture with a
variable color ring.
Steve presented information on how color control is done on PC's.
Three 8bit values representing Red, Green, and Blue, appeared to be
the most popular system. It was suggested the we incorporate an RGB
value property into the light object proposal DMF-011. It was decided
that luminescence remain a separate property.
A discussion ensued concerning the meaning of RGB and how it relates
to chromaticity, it was decided that this should be a local matter.
A motion was made and seconded to add this property to the Lighting
Object. Motion was carried. David Fisher will add this to the
Lighting Output Object.
Visibility of members of a preset.
A discussion ensued concerning whether BACnet should have visibility
of lighting preset contents. It was decided that the WriteGroupMode
service provided a simple "mode" number to select a preset,
further defining mode to be a preset with specific contents may harm
the flexibility of this service for non-lighting applications.
It was decided that the LAWG had submitted proposed solutions to
BACnet lighing requirements and no new issues have been discovered. A
future meeting would be held only if new issues were identified or
further work on current proposal was needed. Tentative date for next
meeting opportunity would be January 14-18 in Chicago. More details
will be posted to the mailing list by Steve Karg as they become
Submitted by Robert Hick with edits by Steve Karg.