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  1. #14
    Join Date
    Nov 2009
    Location
    Tennessee
    Posts
    76
    Quote Originally Posted by osiyo View Post
    Exactly!

    Sometimes the "Net" doesn't work just all that well.

    Make that ... OFTEN

    Side note: Just got back from a site whose internet connection was just not that often or well.

    Nor was the URL they used to fetch that data.
    I can't remember the name of the program module, but it is in the weather service I believe it's sunrise sunset time. It doesn't require the Internet once you input the location (I believe it's longtitude/latitude) it calculates at whatever time interval you want it to. That may be of some help. I've been looking at using the same setup with a schedule. We also have light sensors at all the locations as backups.

  2. #15
    Join Date
    Oct 2003
    Location
    Minnesota
    Posts
    1,382
    Quote Originally Posted by samwinter View Post
    I can't remember the name of the program module, but it is in the weather service I believe it's sunrise sunset time. It doesn't require the Internet once you input the location (I believe it's longtitude/latitude) it calculates at whatever time interval you want it to. That may be of some help. I've been looking at using the same setup with a schedule. We also have light sensors at all the locations as backups.
    Yep, download the data and operate off that. My point was that sometimes things go wrong with an internet connection, or with the site you're trying to access for some data. So relying on continuous live data feeds can lead to issues from time to time.

    Mostly our customers don't use sunrise/sunset, or not solely.

    We typically provide them with a program that allows them to select sunrise/sunset, custom schedule, light level control (operate off user selectable outdoor light level), or combo control (combined schedule and light level).

    In the last case, for instance, staff parking lot lights, operate on a schedule, but as modified by outdoor light level. Customer wanted scheduled time, as staff parking lot lights aren't allowed to come on before 5 am, since no one will be arriving before then. But customer does want lights to turn off once light level is adequate. By 8 am lights are forced off by schedule regardless of outdoor light level. So staff parking lot lights, for morning time, are "enabled" to come on between 5 am and 8 am, but may turn off if outdoor lighting level is above a certain user adjustable setpoint.

    In most cases our customers use a variety of different operation modes for different groups or types of lighting. Some solely by schedule. Some solely by ambient outdoor light level. Some by the combo control method.
    A site where I stash some stuff that might be interesting to some folks.
    http://cid-0554c074ec47c396.office.l...e.aspx/.Public

  3. #16
    Join Date
    Apr 2011
    Posts
    116
    We use the atomic clock with ALC. Works well turns lights on at our school systems on 15 min before sun set and turns off 15 after sun rise

  4. #17
    Join Date
    Jul 2010
    Location
    Denver, CO
    Posts
    435
    Quote Originally Posted by FL.HVAC View Post
    We use the atomic clock with ALC. Works well turns lights on at our school systems on 15 min before sun set and turns off 15 after sun rise
    How does you programming look using the varying times every day for a schedule? I haven't found a way to input a specific on/off time every day into a schedule, but would like to do this.

  5. #18
    Join Date
    Jul 2008
    Posts
    1,481
    You can try this ... something I wrote a couple of years ago.

    https://dl.dropbox.com/u/91943891/Sunset%2420V5.bog

    ...Hmmm, not 100% sure it works
    1 + 1 = 3 ( *** for very large values of 1)

    ...everybody wants a box of chocolates and long stemmed rose

  6. #19
    Join Date
    Mar 2005
    Location
    Pacific Time Zone
    Posts
    4,223
    Since this is a generic question I've used counters, giving me minutes until start of sunset and minutes after end of sunrise. I've had a few lights in which the sunrise/sunset times didn't work out as well due to mountains blocking the sunlight or in the case of parking garages in which they just needed to be on earlier & off later. I then programmed that into logic to say if minutes to sunset less than or equal to 30 minutes or as set, then enable lights and when minutes after sunrise greater than or equal to 45 minutes or as set, then disable lights.
    "How it can be considered "Open" is beyond me. Calling it "voyeur-ed" would be more accurate." pka LeroyMac, SkyIsBlue, fka Freddy-B, Mongo, IndyBlue
    BIG Government = More Dependents
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  7. #20
    Join Date
    Dec 2006
    Location
    Washington, DC
    Posts
    528
    Quote Originally Posted by HuNGRYTeCH View Post
    How does you programming look using the varying times every day for a schedule? I haven't found a way to input a specific on/off time every day into a schedule, but would like to do this.
    Attached is a screenshot of one I did. It uses the sun position and has been working well. It does not rely on internet as the sun position is a constant once the longitude/lattitude is entered.

    The schedule for the balcony lights is only used to turn off the lights at midnight.
    Attached Images Attached Images  
    Quote Originally Posted by Qui-Gon Jinn (Star Wars Episode 1)
    "The ablilty to speak does not make you intelligent!"

  8. #21
    Join Date
    Jul 2008
    Posts
    1,481
    Quote Originally Posted by Balibe View Post
    Attached is a screenshot of one I did. It uses the sun position and has been working well. It does not rely on internet as the sun position is a constant once the longitude/lattitude is entered.

    The schedule for the balcony lights is only used to turn off the lights at midnight.
    ... ah, its a long time since I looked in the Weather jar!

    http://en.wikipedia.org/wiki/Twilight
    1 + 1 = 3 ( *** for very large values of 1)

    ...everybody wants a box of chocolates and long stemmed rose

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