blockEnableCWPump

Generate staging index for condenser water pump control

Information

This block generates stage signal as input for the condenser water pump control.

When there is no stage change command (uStaUp=false, uStaDow=false), it outputs current stage setpoint uStaSet.
When there is a stage up command (uStaUp=true, uStaDow=false), which means that the stage setpoint uStaSet has changed up to a new stage,
1. When the minimum bypass flow has not been reset (uUpsDevSta=false), the stage index for condenser water pump control should still be the old stage (yChiSta = uChiSta).
2. When the minimum bypass flow has been reset (uUpsDevSta=true), the stage index for condenser water pump control should be the stage setpoint uStaSet.
When there is a stage down command (uStaUp=false, uStaDow=true), which means that the stage setpoint uStaSet has changed down to a new stage,
1. When the head pressure control of the chiller being shut off has not been disabled (uUpsDevSta=false), the stage index for condenser water pump control should still be the old stage (yChiSta = uChiSta).
2. When the head pressure control of the chiller being shut off has been disabled (uUpsDevSta=true), the stage index for condenser water pump control should be the current stage setpoint uStaSet.

Type	Name	Description
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput	uUpsDevSta	Status of resetting status of device before enabling or disabling condenser water pump
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput	uStaUp	Stage-up command
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput	uStaDow	Stage-down command
Buildings.Controls.OBC.CDL.Interfaces.BooleanInput	uEnaPla	Just enabling plant
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput	uChiSta	Current chiller stage, does not include stages like X + WSE
Buildings.Controls.OBC.CDL.Interfaces.IntegerInput	uStaSet	Current chiller stage setpoint, does not include stages like X + WSE
Buildings.Controls.OBC.CDL.Interfaces.IntegerOutput	yChiSta	Stage for condenser water pumps control