Siemens SIMOCODE pro Operating Manual page 270

Parameters
4.8 Logic modules
Settings Pulse Width Modulator
Table 4- 103 Settings Pulse Width Modulator
Pulse width modulator
Input
Constant input
Input Minimum
Input Maximum
PWM duration
Pulse width modulator formulas
● Length of 1-signal = PWM period * (PWM Input - PWM Input Minimum)/(PWM Input
Maximum - PWM Input Minimum)
● Length of 0-signal = PWM period - Length of 1-signal.
Note
Signal duration
The shortest signal duration for 0 and 1 is 0.1 s in each case.
If a duration for the 1 signal that is shorter than 0.1 s results from calculation, the output
will remain permanently 0, while for a duration for the 0 signal shorter than 0.1 s the
output remains permanently 1.
270
Description
Activation by any analog signal or "Fixed value"
Any constant; range: 0 to 65535 (default: 0)
Any constant; range 0 to 65535 (default: 0)
Any constant; range 1 to 65535 (default: 65535)
0.2 - 6553.5 s (default: 2)
SIMOCODE pro - Parameterize
Operating Manual, 04/2017, A5E40507630002A/RS-AA/001