This component provides a convenient way to implement load shedding strategies. It causes a specified setpoint to be raised
or lowered by a specific amount in response to an input link, that enables the SetpointLoadShed component. Generally, this
component solves the problem often found in temperature control sequences where shutting down an output directly may be complicated
by other control dependencies. By changing the setpoint based on a shed request, the output is shut down under the direction
of the control sequence and the interdependencies are maintained.
Setup of the SetpointLoadShed involves the following slots, as follows:
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Enabled
True value in this property causes the setpoint to be adjusted by the offset value.
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Setpoint In
This is the normal setpoint value that is be adjusted by the SetpointLoadShed object, if needed.
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Htg Offset
The setpoint is adjusted by this signed (+ or -) amount if active and in heating mode.
-
Clg Offset
The setpoint is adjusted by this signed (+ or -) amount if active and in cooling mode
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Mode In
This StatusEnum type property has three possible modes: Off, Heat, Cool. The modes are selectable from the options list in the property sheet.
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Offset In Effect
This is an output to indicate whether or not the Setpoint Out property value has been adjusted.
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Setpoint Out
This property value is the adjusted setpoint value, if active, otherwise it passes through original setpoint.
A example SetpointLoadShed object property sheet is shown in Figure 45.
See also, Figure 22 for an example wiresheet view using this component.