ExampleVariantsRoomControlFCUSimple (FB)¶

FUNCTION_BLOCK ExampleVariantsRoomControlFCUSimple

Example how to deal with aggregate / plant variants using “external composition”

This example function block implements a simple room control strategy using a fan coil unit.

There are three variant aspects in ExampleVariantsRoomControlFCUSimple:

• the heat valve (type)

• the cool valve (type)

• the condensate pump (type)

Despite the fact there are external elements for those three variant aspects ExampleVariantsRoomControlFCUSimple provides the related output values to help to get a better understanding of functionality during simulation / testing.

Of course this example falls a bit short on complexity, but thats on purpose to focus on aggregate / plant variants using “external composition”.

Real world FCU room controller need to have inputs / configuration for:

• energy level setpoints (see EnergyLevelSetpoint)

• sequence controller settings and manual control (see SequenceControl)

• fan coil settings and manual control (see FancoilContinuous)

InOut:

Scope	Name	Type	Initial	Comment
Input	eLevel	EnergyLevel		Energy level
	rRoomTemp	REAL	22.0	Room temperature
	itfValveHeat	IValveContinuous		Heat valve - plugin your specific continuous valve here.
	itfValveCool	IValveContinuous		Cool valve - plugin your specific continuous valve here.
	itfCondensatePump	IActuatorOnOff		condensate pump - plugin your specific pump on/off here.
	xReset	BOOL	FALSE	Reset
	itfDateTimeProvider	Util.IDateTimeProvider	Globals.g_dtpDateTimeProvider	Source for the current date and time information in milliseconds since 1.1.1970 00:00:00.000
Output	eModeOut	HeatCoolOperationMode	HeatCoolOperationMode.INACTIVE	Operation mode.
	rHeatOut	REAL		Heat valve signal (0..100%).
	rCoolOut	REAL		Cool valve signal (0..100%).
	rFanSpeedOut	REAL	0.0	Fan speed (0..100%).
	xCpumpOut	BOOL	FALSE	Condensate pump.
	xError	BOOL		Error indication
	eErrorID	Error		Error ID