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OK so our last ladder is Ladder 9 that's labeled display.

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And this is going to be a very short and sweet lecture.

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So enjoy it.

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What we're doing here is we're looking at in the 7 9 and when we look at the description of that that's

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our heater C.V our heater control variable that is the output of our Ph.D. that's being sent to our

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heater to tell it how much to heat up.

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And we know there are Ph.D. outputs on a range of 0 to 16 383.

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However we would like to be able to show the operator on the h in my Exactly what percentage of heat

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the heater is generating.

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Is it at 100 percent of its output or is it at 50 percent of its output.

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So all we're doing here is we're rescaling RPI the C.V control variable from a scale of 0 to 16 383

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to a scale of 0 to 100 and we're saving that at a location in 710 which is an integer.

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And if we look that doesn't appear anywhere else in the program only here.

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And the reason for that is it's not for use in the program it's only for use on a display or like the

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HDMI or a host control system.

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So if we want to show on the HDMI how much of a percentage of the output of the heater are we currently

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using We're going to reference in 17 while the actual Ph.D. might be outputting and then sending a signal

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to the heater of twelve thousand five hundred forty two that number is really meaningless to an operator

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an operator is going to think in terms of 100 percent or 0 percent 50 percent 25 percent they can understand

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that.

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So we're going to give them something familiar We're going to scale that CV to zero to 100 and we're

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going to go ahead and put that in front of their faces so they know how hard their heater is working

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.