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  1. #1
    Join Date
    Aug 2006
    New England
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    iLON Analog function block weirdness

    I have some analog function blocks summing air flow and air flow setpoints for use elsewhere to calculate fan speed for a VAV air handler. It works great, but for some reason the output data point range maximum (which sets limits on the output of the function) has been spontaneously changing from 10000 to 2. Needless to say, it kind of screws up the function. Anyone seen this or similar function block problems?

  2. #2
    Join Date
    Dec 2007
    Post Likes
    Are you using LonMaker for the function blocks? You could have a nvi on the iLon that is binded to another controller on the LON network that is overwriting the value. The iLon is a fairly new product, and still has lots of bugs, as I've found out over the last few weeks. So if you can't figure it, tell Echelon.

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