Central brightness from weather station (CenBrgtWths11)

Overview

Application function "Central brightness from weather station 11" (CenBrgtWths11) calculates the brightness on the facade based on 1...4 central sensors on a weather station.

Cen	Central functions
WthStn	Weather station
BrgtOdr...	Outdoor brightness North/East/South/West
Sect	Facade sector
BrgtFcd	Brightness in the facade sector
CenWthStn11	Central weather station 11, measurements for outside air temperature, brightness, solar radiation, wind speed, precipitation
CenFcdShd11	Central facade shading for automatic 11
CenBrgtWths11	Central brightness from weather station 11
CenBrgtFcd11	Central brightness on facade 11
CenGlrPrt11	Central anti-glare protection 11
CenAnnShd11	Central annual shading 11
R	Room
Z	Shading zone in room segment
Shd11	Shading 11, for shading and daylight use with venetian blinds or awnings, group member in a facade sector

Function

Brightness is measured with one or more sensors, typically on one weather station. The following configurations are supported:

One common sensor (270...360°).
Two to four sensors at the cardinal points.
In the event the sensor deviates from the cardinal points, a angle correction can be configured (AglCorr, angle correction of the weather station versus the cardinal point).

The AF calculates brightness on the facade. It considers:

Orientation of the sensor and the facade.
The sensor with the closest orientation is selected, if available.
The solar position.
The sensor value is used if the sun shines on the facade.
The a replace value is used if the sun does not shine on the facade.

Note: AF CenGlrPrt11 provides the calculated effective brightness on the facade in BrgtEff.

Calculation:

Direct radiation is considered if at least 1 sensor is available.

Direct radiation is only considered if at least 3 sensors are available.

Available brightness sensors	Sun on the facade	Sun not on the facade
No sensor	0 lx	0 lx
1 sensor	Sensor value	0 lx
2 sensors at a right angle 1 of which is in the direction of the facade (±45 °)	Sensor with the closest orientation	0 lx
2 sensors at a right angle None of which is in the direction of the facade (±45 °)	Max. both sensors	0 lx
2 sensors in opposing direction 1 of which is in the direction of the facade (±45 °)	Sensor with the closest orientation	0 lx
2 sensors in opposing direction None of which is in the direction of the facade (±45 °)	Max. both sensors	0 lx
3 sensors 1 of which is in the direction of the facade (±45 °)	Sensor with the closest orientation	Min. all sensors
3 sensors None of which is in the direction of the facade (±45 °)	Max. all sensors	Min. all sensors
4 sensors	Sensor with the closest orientation	Min. all sensors

Configuration

Parameter

Description	Parameter	Default value
Angle correction -180...180 [°] (+ means: Weather station is turned clockwise versus the cardinal points)	AglCorr	0 [°]

Description

Parameter

Default value

Angle correction

-180...180 [°]
(+ means: Weather station is turned clockwise versus the cardinal points)

AglCorr

0 [°]

Interface

Interface	Description	Type	Ref.	Owner
BrgtOdrNorth	Outdoor brightness north	AI	◉	Central function / Device
BrgtOdrEast	Outdoor brightness east	AI	◉
BrgtOdrSouth	Outdoor brightness south	AI	◉
BrgtOdrWest	Outdoor brightness west	AI	◉
BrgtOdr	Outdoor brightness	AI	◉

Engineering and commissioning

Directional sensors (90...180 °) are connected as per the cardinal point.

Nondirectional sensors (270...360 °) are connected to BrgtOdr.

Any combination possible, but at least 1 sensor is required.

Hierarchical grouping

Within CenFcd11, subordinate AF CenBrgtWths11 is required for CenGlrPrt11 / CenAnnShd11. These distribute their data to subordinate central AFs or directly to the connected room segments.