DamperAnalog (FB)¶

FUNCTION_BLOCK DamperAnalog

Short Description¶

Control of a continuous damper actuator with continuous position feedback

Typical application: Continuous recirculation damper of a HVAC system

Portrayal¶

Interfaces¶

Inputs¶

Name
Datatype

Range

Init-Value

Function

rY REAL
Setpoint value

rU REAL 0.0
Actual value - Position

eAO HVACTYPES.eManNum HVACTYPES.eManNum.Auto, HVACTYPES.eManNum.Man HVACTYPES.eManBin.Auto
Operating mode of manual override - Hardware

rPoti REAL 0.0
Manual override value - Hardware

Outputs¶

Name
Datatype

Range

Init-Value

Function

rHA REAL
Control signal Damper actuator after manual override

rAA REAL
Control signal Damper actuator before manual override

xAlarm BOOL
Fault message

Setpoints / Parameters¶

Name
Datatype

Range

Init-Value

Function

udiControlTime UDINT 10s ... 600s 150s
Signal delay of position monitoring

rControlDiff REAL 7.0
Maximum deviation between target and actual position value

xControl BOOL TRUE
Enabling position monitoring

rManValue REAL 0.0
Manual value

eManModeN eMANNUM eMANNUM.Auto, eMANNUM.Man eMANBIN.Auto
Manual override mode

Functional description¶

Actuator signal Damper actuator before manual override rAA¶

The control signal of the damper actuator before manual override rAA is accepted unchanged from the input set point - position rY.

Control signal Damper actuator after manual override rHA¶

The control signal of the damper actuator after manual override rHA corresponds to the control signal of the damper actuator before manual override rAA.

, additionally extended by a manual override module.

rAA eManModeN rHA
Notes

X eMANNUM.Auto rAA
Manual override module in automatic mode

X eMANNUM.Man rManValue Handübersteuermodul in Handbetrieb

Legend: X = any

xAlarm collective fault¶

The collective fault xAlarm is activated (= TRUE) if the difference between the output signal of the damper actuator after manual override rHA and
dem Istwert der Position rU während einer Mindestzeitdauer von udiControlTime permanent die maximale Abweichung zwischen Soll- und Istwert der Position
during a minimum time period of udiControlTime.
At the same time, both the enable of the position monitoring xControl must be active (= TRUE) and the operating mode of the manual override hardware
must be in the position HVACTYPES. eManBin. Auto.

In all other cases, the xAlarm collective fault is not activated (= FALSE).

Visualization¶

Information¶

Element
Authors

Date
Version
Note

Function
Alexander Halter 09.2016 1.0
Initial version

Programming
Alexander Halter 09.2016 1.0
Initial version

Test Jochen Reu 11.2017 1.0
Initial version

Documentation
Jochen Reu 11.2017 1.0
Initial version

Codesys¶

InOut:

Scope	Name	Type	Initial	Comment
Input	rY	REAL		Setpoint value
	rU	REAL	0	Actual value - Position
	eAO	eManNum	HVACTYPES.eManNum.Auto	Operating mode of manual override - Hardware
	rPoti	REAL	0	Manual override value - Hardware
Output	rHA	REAL		Control signal Damper actuator after manual override
	rAA	REAL		Control signal Damper actuator before manual override
	xAlarm	BOOL		Fault message
Input	udiControlTime	UDINT	150	Signal delay of position monitoring
	rControlDiff	REAL	7	Maximum deviation between target and actual position value
	xControl	BOOL	TRUE	Enabling position monitoring
	rManValue	REAL	0	Manual value
	eManModeN	eMANNUM	eMANNUM.Auto	Manual override mode