FB_CTRL_PWM_OUT_EXT

FB_CTRL_PWM_OUT_EXT 1:

This function block creates a PWM modulated signal on the basis of the input signal. Both the minimum switch-on time and the minimum switch-off time can be parameterized, in addition to the mark-to-space ratio, in this extended function block.

Description of the output behavior 1

FB_CTRL_PWM_OUT_EXT 2:

Description of the output behavior 2

FB_CTRL_PWM_OUT_EXT 3:

Inputs

VAR_INPUT
    fPwmInput  : FLOAT; 
    eMode      : E_CTRL_MODE;
END_VAR

Name	Type	Description
fPwmInput	FLOAT	Input value for the function block
eMode	E_CTRL_MODE	Input that specifies the operation mode of the function block.

Outputs

VAR_OUTPUT
    bPwmOutBitPos  : BOOL;
    bPwmOutBitNeg  : BOOL;
    eState         : E_CTRL_STATE;
    bError         : BOOL;
    eErrorId       : E_CTRL_ERRORCODES;
END_VAR

Name	Type	Description
bPwmOutBitPos	BOOL	PWM signal, when fPwmInput > 0.0
bPwmOutBitNeg	BOOL	PWM signal, when fPwmInput < 0.0
eState	E_CTRL_STATE	State of the function block
bError	BOOL	Supplies the error number when the output `bError` is set.
eErrorId	E_CTRL_ERRORCODES	Becomes TRUE, as soon as an error occurs.

Inputs/ outputs

VAR_IN_OUT
    stParams    : ST_CTRL_PWM_OUT_EXT_PARAMS;
END_VAR

Name	Type	Description
stParams	ST_CTRL_PWM_OUT_EXT_ PARAMS	Parameter structure of the PWM element

stParams consists of the following elements:

TYPE ST_CTRL_PWM_OUT_EXT_PARAMS :
STRUCT
    tTaskCycleTime  : TIME; 
    tPWMPeriod      : TIME; 
    tMinOnTime      : TIME; 
    tMinOffTime     : TIME; 
    tMinWaitTime    : TIME; 
END_STRUCT
END_TYPE

Name	Type	Description
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.
tPWMPeriod	TIME	Period of the PWM signal
tMinOnTime	TIME	Minimum switch-on time
tMinOffTime	TIME	Minimum switch-off time
tMinWaitTime	TIME	Waiting time between the switching actions between a positive and negative output signal