This component performs a linear “reset” on the inA value. Reset is available in the Math folder of the kitControl palette. Reset operation is defined by the following four slots:
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Input Low Limit — must be less than the Input High Limit
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Input High Limit — must be greater than the Input Low Limit
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Output Low Limit — may (or may not) be greater than the Output High Limit
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Output High Limit — may (or may not) be greater than the Output Low Limit
For example, a Reset object is used to establish a hot water control setpoint, based on the outside air temperature at inA. When the outside air temperature is 0˚F, the hot water setpoint is 200˚F. When the outside air temperature is 75˚F, the hot water setpoint is 100˚F. The Reset object is configured as:
Input Low Limit = 0.0 Input High Limit = 75.0 Output Low Limit = 200.0 Output High Limit = 100.0
Whenever the inA value is beyond the input limits, the output is limited by the corresponding output limit (in this case, 200 at 0˚F or below, 100 at 75˚F or above). When the input is at an intermediate value, the output scales linearly. For example, when the outside air temperature is at 38.2˚F, the Reset output is 149.1˚F.