FB_BA_V_dP_kFactor
The template is used to determine the volume flow by means of differential pressure and k-factor.
 | The initialization of the template takes place within the method FB_Init. |
Syntax
FUNCTION_BLOCK FB_BA_V_dP_kFactor
VAR_INPUT
{attribute 'parameterUnit':='Pa'}
f_dP : REAL;
END_VAR
VAR_OUTPUT
{attribute 'parameterUnit':='m³/h'}
fV : REAL;
END_VAR
VAR_INPUT CONSTANT PERSISTENT
{attribute 'parameterCategory':='Unit'}
eConversion_kFactor : E_BA_Conversion_kFactor := E_BA_Conversion_kFactor.e_Pa;
{attribute 'parameterCategory':='Config'}
fK : REAL := 381;
END_VAR
VAR
fConversionF : REAL;
END_VAR
VAR CONSTANT
f_Pa : REAL := 1;
f_hPa : REAL := 0.1;
f_mbar : REAL := 0.1;
f_mm_HG : REAL := 0.086613;
f_in_HG : REAL := 0.017185;
f_mm_WS : REAL := 0.31933;
f_psi : REAL := 0.012043;
f_inches_H2O : REAL := 0.063361;
END_VAR
Outputs
Inputs CONSTANT PERSISTENT
Name | Type | Description |
|---|---|---|
eConversion_kFactor | Conversion factor for the unit of the k-factor. | |
fK | REAL | k-factor of the fan nozzle vendor (Venturi principle). |
Variables
Name | Type | Description |
|---|---|---|
fConversionF | REAL | Indicates which conversion factor has been selected by the enumeration variable eConversion_kFactor and is used to calculate the volume flow rate. |
Variables
Name | Type | Description |
|---|---|---|
f_Pa | REAL | Conversion factor for pressure [Pa]. |
f_hPa | REAL | Conversion factor for pressure [hPa]. |
f_mbar | REAL | Conversion factor for pressure [mbar]. |
f_mm_HG | REAL | Conversion factor for the unit millimeter mercury column [mmHG, Torr]. |
f_in_HG | REAL | Conversion factor for the unit inch of mercury [inHG]. |
f_mm_WS | REAL | Conversion factor for the unit millimeter water column [mmWS, mmH2O]. |
f_psi | REAL | Conversion factor for pressure [psi]. |
f_inchesn_H2O | REAL | Conversion factor for the unit inch water column [inH2O]. |
Requirements
Development environment | Necessary function |
|---|---|
TwinCAT from v3.1.4024.35 | TF8040 | TwinCAT Building Automation from V5.0.0.0 |