FB_ALY_WtTurbulence_1Ch

The WT Turbulence 1Ch calculates the mean of the wind velocity, the turbulence, and the turbulence intensity according to the standard EN 61400-1. As input signal, the wind velocity is required. The output values are updated in a cycle of 10 minutes.

Syntax

Definition:

FUNCTION_BLOCK FB_ALY_WtTurbulence_1Ch
VAR_OUTPUT
    ipResultMessage: Tc3_EventLogger.I_TcMessage;
    bError: BOOL;
    bNewResult: BOOL;
    bConfigured: BOOL;
    fMean: LREAL;
    fTurbulence: LREAL;
    fTurbulenceIntensity: LREAL;
END_VAR

Outputs

Name	Type	Description
ipResultMessage	I_TcMessage	Contains more detailed information on the current return value. This special interface pointer is internally secured so that it is always valid/assigned.
bError	BOOL	This output is `TRUE` if an error occurs.
bNewResult	BOOL	When a new result has been calculated, the output is `TRUE.`
bConfigured	BOOL	Displays `TRUE` when the function block is successfully configured.
fMean	LREAL	Mean value of the wind speed.
fTurbulence	LREAL	Turbulence of the wind. According to the EN standard, this is the standard deviation of the wind speed during a time interval of 10 minutes.
fTurbulenceIntensity	LREAL	Intensity of wind turbulence.

Methods

Name	Definition Location	Description
Call()	Local	Method calculates the outputs for a given configuration.
Configure()	Local	General configuration of the algorithm with its parameterized conditions.
Reset()	Local	Resets all internal states or the calculations made so far.
SetChannelValue()	Local	Method to pass values to the algorithm.

Sample

VAR
    fbWtTurbulence : FB_ALY_WtTurbulence_1Ch;
    fbSystemTime : FB_ALY_GetSystemTime;
    nNumCycles : UDINT;
    bConfigure : BOOL := TRUE;
    nInput : INT;
END_VAR

// Configure algorithm
IF bConfigure THEN
    bConfigure := FALSE;
    
    fbWtTurbulence.Configure(nNumCycles);
END_IF

// Get current system time
fbSystemTime.Call();

// Call algorithm
fbWtTurbulence.SetChannelValue(nInput);
fbWtTurbulence.Call(fbSystemTime.tSystemTime);

Requirements

Development environment	Target platform	Plc libraries to include
TwinCAT v3.1.4024.0	PC or CX (x64, x86)	Tc3_Analytics

Further Information