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  1. #1
    Join Date
    Apr 2003
    Posts
    108

    Niagara AX- How do you write a boolean value when a device comm goes down?

    Im looking to create some logic if someone shuts the power off to one of the chillers. Since it will not see a actual alarm from the chiller i want to switch over to the other chiller when the comm goes down. Seems like it should be pretty easy but i could not get anything to work.

    Also what are you guys using for rolling average blocks? I want take multiple snapshots of a value over a period of time.

  2. #2
    Join Date
    Jan 2002
    Location
    Fort Worth\Dallas, Texas
    Posts
    1,703
    You could use a StatusDemux in KitControl
    Go Rangers!

  3. #3
    Join Date
    Feb 2009
    Location
    Northeast
    Posts
    354
    Check out kitControl/Util/StatusDemux.

    Part 2 there is a Numeric Delay that maybe what you want. There is also an average feature in the History Chart Builder that sets duration and average under the rollup line.

  4. #4
    Join Date
    Apr 2003
    Posts
    108
    Quote Originally Posted by billcontrols View Post
    Check out kitControl/Util/StatusDemux.

    Part 2 there is a Numeric Delay that maybe what you want. There is also an average feature in the History Chart Builder that sets duration and average under the rollup line.
    Thanks guys you both solved my issues.

  5. #5
    Join Date
    Jul 2008
    Posts
    1,475
    Quote Originally Posted by droptchevy View Post
    ... switch over to the other chiller when the comm goes down. ...
    build a ProgramObject ..... add a property (health) of type driver:PingHealth

    then ... boolean b = getHealth().getDown() ;

    make a link from yourDevice/health -> yourProgram/health

    Quote Originally Posted by droptchevy View Post
    Also what are you guys using for rolling average blocks? I want take multiple snapshots of a value over a period of time.
    vykonPro NumericHistoryCalc and NumericHistoryAnalysis
    1 + 1 = 3 ( *** for very large values of 1)

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

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