PERCENT_TO_DALI
Conversion of the output value of a DALI control gear from 0...100 % to 0...254.
The conversion is logarithmic, as described in IEC 62386. A special feature is the output value 255 (MASK). If the value 255.0 is passed to the function, the value 255 (MASK) is returned.
The following table shows some example values:
fPercent | Return value |
|---|---|
<= 0.0 | 0 |
0.100 | 1 |
0.128 | 10 |
0.991 | 85 |
1.492 | 100 |
3.206 | 128 |
5.845 | 150 |
22.892 | 200 |
100.0 <= fPercent < 255.0 | 254 |
>= 255.0 | 255 (MASK) |
Inputs
VAR_INPUT
fPercent : LREAL;
END_VARName | Type | Description |
|---|---|---|
fPercent | LREAL | Output value for the DALI control gear (0…100%). |
Requirements
Development environment | Required PLC library |
|---|---|
TwinCAT from v3.1.4024.32 | Tc3_DALI from v3.12.0.0 |