Siemens SIMOCODE 3UF Programming And Operating Manual page 131

Formulas
Length of 1-signal = PWM period * (PWM Input - PWM input minimum) / (PWM input
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maximum - PWM input minimum)
Length of 0-signal = PWM period - Length of 1-signal.
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Note
The shortest signal duration for 0 and 1 is 0.1 s in each case.
If the calculation yields a duration for the 1-signal of less than 0.1 s, the output remains 0,
and if a duration for the 0-signal of less than 0.1 s is calculated, the output remains 1.
SIMOCODE PRO V PN FDI
Programming and Operating Manual, 05/2020, A5E44499659002A/RS-AA/001
Logic Modules
13.11 Pulse width modulator
131