FB_CTRL_P

FB_CTRL_P 1:

The function block provides an P-transfer element in the functional diagram.

Transfer function:

Inputs

VAR_INPUT
    fIn      :FLOAT;
    eMode    :E_CTRL_MODE;
END_VAR

Name	Type	Description
fIn	FLOAT	Input of the P element
eMode	E_CTRL_MODE	Input that specifies the operation mode of the function block.

Outputs

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

Name	Type	Description
fOut	FLOAT	Output of the P element
eState	E_CTRL_STATE	State of the function block
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_P_PARAMS;
END_VAR

Name	Type	Description
stParams	ST_CTRL_P_ PARAMS	Parameter structure of the P element

stParams consists of the following elements:

TYPE ST_CTRL_P_PARAMS:
STRUCT
    tCtrlCycleTime    : TIME := T#0ms; 
    tTaskCycleTime    : TIME := T#0ms; 
    fKp               : FLOAT := 0.0; 
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.
fKp	FLOAT	Proportional gain of the P-element