FB_CTRL_NOISE_GENERATOR (only on a PC system)

Output signal:

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