FB_CTRL_LIMITER

FB_CTRL_LIMITER 1:

This function block limits an input signal to a parameterizable interval.

Description of the output behavior

FB_CTRL_LIMITER 2:

Inputs

VAR_INPUT
    fIn        : FLOAT;
END_VAR

Name	Type	Description
`fIn`	`FLOAT`	Input value for the function block

Outputs

AR_OUTPUT
    fOut       : FLOAT;
    bMinLimit  : BOOL;
    bMaxLimit  : BOOL;
    eErrorId   : E_CTRL_ERRORCODES;
    bError     : BOOL;
END_VAR

Name	Type	Description
fOut	FLOAT	Output of the function block
bMinLimit	BOOL	A TRUE at this output indicates that the output has reached the lower limit.
bMaxLimit	BOOL	A TRUE at this output indicates that the output has reached the upper limit.
eErrorId	E_CTRL_ERRORCODES	Supplies the error number when the output `bError` is set.
bError	BOOL	Becomes TRUE, as soon as an error occurs.

Inputs/ outputs

VAR_IN_OUT
    stParams        : ST_CTRL_LIMITER_PARAMS;
END_VAR

Name	Type	Description
stParams	ST_CTRL_ LIMITER_ PARAMS	Parameter structure of the function block

stParams consists of the following elements:

TYPE ST_CTRL_LIMITER_PARAMS:
STRUCT
    tCtrlCycleTime  : TIME := T#0ms;
    tTaskCycleTime  : TIME := T#0ms;
    fMinOutput      : FLOAT;
    fMaxOutput      : FLOAT;
END_STRUCT
END_TYPE

Name	Type	Description
tCtrlCycleTime	TIME	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	TIME	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.
fMinOutput	FLOAT	Lower limit to which the output is restricted.
fMaxOutput	FLOAT	Upper limit to which the output is restricted.