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Reset

The Reset component performs a linear reset on the In value.

Reset component

Slots

The Reset component has the following slots:

  • Status: shows the component's status;
  • Out: the output value;
  • In: the input value;
  • In Min: the input low limit, must be less than the input high limit;
  • In Max: the input high limit, must be greater than the input low limit;
  • Out Min: the output low limit, may (or may not) be greater than the output high limit;
  • Out Max: the output high limit, may (or may not) be greater than the output low limit.

The Reset operation is defined by the In Min/Max and Out Min/Max slots. For example, the Reset component is used to establish a hot water control setpoint, based on the outside air temperature at the In slot. If the outside air temperature is 0˚F, the hot water setpoint is 200˚F. If the outside air temperature is 75˚F, the hot water setpoint is 100˚F. The Reset component is configured as follows:

In Min (input low limit) = 0.0 

In Max (input high limit) = 75.0 

Out Min (output low limit) = 200.0 

Out Max (output high limit) = 100.0 

Whenever the In 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). If the input is at an intermediate value, the output scales linearly. For example, if the outside air temperature is at 38.2˚F, the Reset output is 149.1˚F.

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