Shading daylight correction (ShdDlgtCorr11)
Overview
The application function "Shading daylight correction 11" (ShdDlgtCorr11) adapts the brightness sensor characteristics to the actual blinds position (less daylight when the blinds are in glare protection position than when they are fully open.)
Function
Input
The AF reads the current blinds position and determines the effective daylight correction factor (ShdCorrFacDlgt).
Output
ShdCorrFacDlgt is made available on BACnet for constant lighting control:
- If the progress value of blinds height is higher or equal to BlsMinRdcDlgt, ShdCorrFacDlgt = CorrFacRdcDlgt.
- If the progress value of blinds height is lower than (BlsMinRdcDlgt - BlsHystRdcDlgt), ShdCorrFacDlgt = CorrFacDlgt.
Determination of correction factor daylight and reduced daylight are part of the workflow for brightness sensor calibration, which is described in detail in documentation of LgtBrgtSwi11/LgtConstCtl11.
Correction factor daylight:
- determined in normal daylight situation with blinds fully open
Correction factor reduced daylight:
- determined in normal daylight situation but with blinds in glare protection position.
Configuration
Parameters
Description | Parameter | Default value |
|---|---|---|
Correction factor daylight | CorrFacDlgt | 1.0 |
Correction factor for reduced daylight | CorrFacRdcDlgt | 1.0 |
Minimum blinds position by reduced daylight | BlsMinRdcDlgt | 70 [%] |
Hysteresis blinds position by reduced daylight | HysBlsRdcDlgt | 30 [%] |
Interface
Interface | Description | Type | Ref. | Owned by |
|---|---|---|---|---|
ShdCorrDlgt | Shading correction factor daylight | ACalcVal | ● | - |
Engineering and commissioning
Diagnostics
To verify the function of the chart in CFC, the output pin ShdCorrDlgt shows the correction factor daylight from shading.
Assigning Correction factor Daylight
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Assign Shd(1).ShdCorrDlgt(1) to Lgt(1).LgtCorrDlgtCol | Assign Shd(1).ShdCorrDlgt(1) |
