FB_CTRL_NOTCH_FILTER

Transfer function:

Bode diagram:

with:

VAR_INPUT

VAR_INPUT
    fIn         : FLOAT;
    fManValue   : FLOAT;
    eMode       : E_CTRL_MODE;
END_VAR

fIn : Input value of the notch filter.

fManValue : Input value that is output at the output in manual mode.

eMode : Input that specifies the operation mode of the function block.

VAR_OUTPUT

VAR_OUTPUT
    fOut         : FLOAT;
    eState       : E_CTRL_STATE;
    eErrorId         : E_CTRL_ERRORCODES;
    bError       : BOOL;
END_VAR

fOut : notch filter output.

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_NOTCH_FILTER_PARAMS;
END_VAR

stParams : Parameter structure of the notch filter. This consists of the following elements:

TYPE
ST_CTRL_NOTCH_FILTER_PARAMS:STRUCT    tCtrlCycleTime : TIME :=
T#0ms; (* controller cycle time [TIME] *)    tTaskCycleTime : TIME :=
T#0ms; (* task cycle time [TIME] *)    fNotchFreq : FLOAT := 0;
(* [Hz] *)    fBandwidth : FLOAT := 0;
(* Bandwidth in Hz = fBandwidth*fNotchFreq *)END_STRUCTEND_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.

fNotchFreq : Notch frequency in Hz

fBandwidth : Bandwidth related to the notch frequency: bandwidth in Hz = fNotchFreq * fBandwidth

Requirements