PWM

 Function Block A function block groups an algorithm and a set of private data. It has inputs and outputs. - Generate a PWM signal.

Inputs

Input	Data Type	Range	Unit	Default	Description
XIN	REAL				Input analog value.
XinMin	REAL				Minimum input value.
XinMax	REAL				Maximum input value.
MinPulse	TIME				Minimum pulse time on output.
Period	TIME				Period of the output signal.

Outputs

Output	Data Type	Range	Unit	Default	Description
Default (.Q)	BOOL				Blinking PWM signal.

Remarks

• The input value is truncated to [XinMin .. XinMax] interval.
  • XinMax must be greater than XinMin.

• The signal is TRUE during:

(Xin - XinMin) * Period / (XinMax - XinMin)

FBD Language

ST Language

PWM1 is a declared instance of PWM function block.

PWM1 (rIn, rInMin, rInMax, tMinPulse, tPeriod);
Signal := PWM1.Q;