FB_CTRL_NOISE_GENERATOR (only on a PC system)
This function block generates a noise signal on the basis of the pseudo-random number in the range [ -fAmplitude/2 ... fAmplitude/2 ] .
Output signal:
![FB_CTRL_NOISE_GENERATOR (only on a PC system) 2:](Images/gif/11283513483__Web.gif)
Output signal with an amplitude of 5.0.
VAR_INPUT
VAR_INPUT
fManSyncValue : FLOAT;
eMode : E_CTRL_MODE;
END_VAR
fManSyncValue : Input magnitude whose value is sent to the output in manual mode.
eMode : Input that specifies the block's operating mode.
VAR_OUTPUT
VAR_OUTPUT
fOut : FLOAT;
eState : E_CTRL_STATE;
eErrorId : E_CTRL_ERRORCODES;
bError : BOOL;
END_VAR
fOut : Output of the noise generator.
eState : State of the function block.
eErrorId : Supplies the error number when the bError output is set.
bError : Becomes TRUE, as soon as an error occurs.
VAR_IN_OUT
VAR_IN_OUT
stParams : ST_CTRL_NOISE_GENERATOR_PARAMS;
END_VAR
stParams : Parameter structure of the noise generator. This consists of the following elements:
TYPE
ST_CTRL_NOISE_GENERATOR_PARAMS:
STRUCT
tCtrlCycleTime : TIME := T#0ms; (* controller cycle
time [TIME] *)
tTaskCycleTime : TIME := T#0ms; (* task cycle time
[TIME] *)
fAmplitude : FLOAT := 0;
END_TYPE
tCtrlCycleTime : Cycle time with which the control loop is processed. This must be greater than or equal to the TaskCycleTime. The function block uses this input value to calculate internally whether the state and the output values have to be updated in the current cycle.
tTaskCycleTime : Cycle time with which the function block is called. If the function block is called in every cycle this corresponds to the task cycle time of the calling task.
fAmplitude : Amplitude of the output signal. A noise signal extending over the range [ -fAmplitude/2.0 ... fAmplitude/2.0 ] is created at the function block's output.
Requirements
Development environment | Target system type | PLC libraries to be linked |
---|---|---|
TwinCAT v2.8 | PC (i386) | TcControllerToolbox.lib |