Siemens SIMATIC S7-1500 Manual page 16

Pulse waveform
The pulse duration of the actual signal profile is slightly longer than the specified, ideal pulse
duration.
The figure below shows the reaction of the output to control by PWM. The blue line shows
the specified, ideal signal profile (square wave signal), with which the output is controlled.
The red dashed line shows the actual signal profile on the output terminal, caused by the
externally connected load.
①
②
Figure 2-3
DQ 8x24VDC/2A HF Digital Output Module (6ES7522-1BF00-0AB0)
Manual, 06/2018, A5E03485650-AF
Time period
Pulse duration (duty factor x time period)
Pulse waveform at output terminal
Product overview
2.2 Functions
15