Cumberland EDGE 890-00601, Installation And User Manual

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Chapter 9: Curves and schedules
Light curves
Light program curve editing is different than when configuring other curve types. Instead of setting
numeric values versus age as is done in temperature curves, you must select a daily light schedule in
combo boxes. Daily light schedules are created using the schedule editor.
Light curves are used to link light intensity to output percentage or 0-10V signal to achieve a linear light
response. A light curve has 11 points and the controller interpolates the necessary outputs to achieve a
given light intensity between two points. When a new curve is created, the first column is populated with
10, 20, 30, 40, 50, 60, 70, 80, 90, 99 and 100% values. These values are editable; some loads require a
different set of points to achieve linearity.
A load can be connected to an Edge variable module (SSR). An Edge variable module is driven with
either 0.00V (light Off) or 2.50-10.00V signal (light 1-100% On). Because variable modules cannot be
driven between 0 and 2.5V, Edge linearly maps a 1% output to 2.50V and a 100% output to 10.00V.
A load can also be connected to an external variation device and use straight 0-10V signal. These non-
Edge branded variation devices may use part of the 0-2.50V signal range.
Default light curves are read only. You can, however, display a default curve, duplicate it, and edit the
copy.
When creating a new light curve, you must first select the following:
Type All preceding curve types plus variable light
Load/New Select load to get an existing curve, Select New to create a new curve
Name
Predefined curve names cannot be edited. Name of new curves and user-defined curve
can be edited
A new screen is displayed, allowing you to create your light curve.
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