PWM

Name :PWM output

Symbol:PWM

Illustrate:

    With this function block, you can control the pulse to output continuously at a certain frequency and a certain station-control ratio, and this function block does not realize the acceleration and deceleration of the frequency, nor does it have an emergency stop, and only outputs at the specified frequency.

Image:

Parameter:

Parameter	Statement	IN/OUT	Parameter role	Illustrate	Default value
OUTPORT	UDINT	IN	PWM output port	0-7	not
ENABLE	BOOL	IN	The function block is enabled	TRUE If it is enabled, the function block will start running (the cycle time and duty cycle can be dynamically adjusted during operation), and if FALSE is disabled, the function block will stop running	not
CYCLE	UDINT	IN	PWM cycles：Unit us	5-1000000 （200KHz - 1Hz）；0--Use the default value	Yes/10000
DUTYCYCLE	UINT	IN	Duty cycle parameter	0-65535：Duty cycle = Duty cycle parameter/65535*100%	not
DONE	BOOL	OUT	Execution success flag	TRUE：The function block is executed successfully；FALSE：The function block is not executed	Yes/FALSE
BUSY	BOOL	OUT	PWM output flag	TRUE：PWM output	Yes/FALSE
ERROR	BOOL	OUT	Error flags	TRUE：There was an error with the function block call	Yes/FALSE
ERRORID	DINT	OUT	Error codes	0：normal；other：Error code value	Yes/0

Error codes:

Error codes	Illustrate
0	inerrancy
1	Invalid pulse port
2	The pulse port is busy/pre>
12	PWM cycle error

Example:

LD:

ST:

PWM_inst1(OUTPORT := 0,
	ENABLE := TRUE,
	CYCLE := 100,
	DUTYCYCLE := 32768,
	DONE => DoneOut,
	BUSY => BusyOut,
	ERROR => ErrorOut,
	ERRORID => ErrorIDOut);

Interpretation:

   OUTPORT IS 0, WHICH MEANS THAT PORT 0 IS USED FOR OUTPUT.
   IF ENABLE IS TRUE, PWM IS ENABLED, AND THE FUNCTION BLOCK STARTS TO OUTPUT PWM WAVEFORMS.
   CYCLE is 100, which means that the cycle time of the PWM waveform to be output is 100us (10KHz);
   DUTYCYCLE IS 32768, WHICH MEANS THAT THE DUTY CYCLE IS 32768/65535*100%, WHICH IS ABOUT 50%;
   If DoneOut is TRUE, the PWM output is executed.
   If BusyOut is TRUE, port 0 is outputting PWM.
   If ErrorOut is set to TRUE, the function block is faulty and the error code is ErrorIDOut.