Siemens SIMATIC ET 200SP Manual page 23

DQ operating mode DQ (valve control)
3.2 Parameters/address space
Chronological sequence
The figure below shows the chronological sequence for valve control. The pulse width
modulation is activated in the next possible data cycle.
①
Data cycle
②
Holding time valve control
Figure 3-3 Valve control
"Pulse width modulation time period" parameter
You use the "Pulse width modulation time period" parameter to specify the frequency of the
pulse width modulation "modulated upon" for the valve control (see section Pulse width
modulation (Page 46)).
Note: When this is parameter is set to "Off", the DQ 4×24VDC/2A HS is in normal operation
without valve control.
"Pulse width modulation duty cycle" parameter
You use the "Pulse width modulation duty cycle" parameter (0 ... 1000) to specify the pulse
duty cycle of the "modulated upon" pulse width modulation within the configured period.
Note: Unlike in the "Pulse width modulation" operating mode, the duty factor cannot be
updated cyclically as a function of an output value from the user program in normal operation
with valve control.
Derating
Read the information on derating of the module in section Derating of the DQ 4x24VDC/2A
HS (Page 95).
22
Digital output module DQ 4x24VDC/2A HS (6ES7132-6BD20-0DA0)
Manual, 06/2018, A5E32855695-AC