Central wind protection 1 (CenWdPrt11)

Overview

The application function "Central wind protection 11" (CenWdPrt11) handles one or more wind sensors with the same limit value.

Sect	Facade sector
WdSpd	Wind speed
Cen	Central functions
CenPrtShd11	Central protection shading 11
CenWdPrt11	Central wind protection 11
CenWdPrt12	Central wind protection 12
CenPrtShdDlyxx	Central protection shading delay 11 ...13
R	Room
Z	Shading zone in one room segment
Shd11	Shading 11, for shading and daylight use with venetian blinds or awnings, group members

Function

The AF reads the values from one or more wind sensors, determines the highest value and attenuates the result using switch on and off delays. The result (WdSpdRs) is provided for monitoring.

The permissible limit value is configured as per the design value of the shading products.

The AF transfers the following to CenPrtShd11:

A configurable blinds setting (CmdLmExc) in the event the limit value is exceeded.
A configurable blinds setting (CmdSenFlt) in the event of a sensor fault (if all wind sensors report "unreliable").

Hierarchical grouping

This AF supports hierarchical grouping. For detailed information, see Hierarchical grouping.

Interface to local and superordinate functions

Local inputs and superordinate AFs access the same BACnet objects. Evaluation by priority. The local protection input has higher priority than the shading command of the superordinate central functions.

Configuration

Parameter

Description	Parameter	Default value
Switch-on point	SwiOnPt	7 [m/s], 1378.0 [ft/min]
Switch-off point	SwiOffPt	5 [m/s], 984.3 [ft/min]
Switch-on delay protection function 0...300 [min]	DlyOnPrt	0 [min]
Switch-off delay protection function 0...300 [min]	DlyOffPrt	20 [min]
Command on limit exceed ▶ Use 2...9 1:None ▶ No action, no protection reaction. 2:Open 3:Height 25%, angle undef 4:Height 50%, angle undef 5:Height 75%, angle undef 6:Height 100%, angle 0% 7:Height 100%, angle 25% 8:Height 100%, angle 50% 9:Closed	CmdLmExc	2:Open
Command on sensor fault ▶ Use 1 (None) if sensor fault is ignored. ▶ Use 2...9 if sensor fault is to trigger a reaction. Enumeration see CmdLmExc	CmdSenFlt	2:Open
Air velocity unit [m/s], [ft/min]	AirVUnit	[m/s]

Interface

Interface		Description	Type	Ref.	Owner
WdSpdCol		Collection of wind speed		●	-
	WdSpdRs	Result of wind speed	ACalcVal	●	-
	WdSpd	Wind speed	AI	◉	Central function / Device

Engineering and commissioning

Another wind speed may dominate depending on location (weather station, roof, facade, building edge). Multiple limit values can be defined to compensate for deviations between wind sensors and shading products. For two limit values, use CenWdPrt12; for three limit values use CenWdPrt11 and CenWdPrt12.