Siemens SIMATIC S7-1500 System Manual page 137

Configuring
7.10 Configuring the digital inputs and digital inputs/outputs (X122/X132)
You can assign the SINAMICS digital inputs and digital inputs/outputs (X122/X132) using
frame 39x of the PU. The status information of the digital inputs and digital outputs is then
transferred at the PROFIdrive PZD sampling rate (p2048). The inputs/outputs are also
sampled in the configured sampling time for the digital inputs and digital inputs/outputs
(p0799). The application of the output values and return of the input values are therefore
subject to dead times and jitter.
Figure 7-29 Configuration of frame 393 for automatic speed control
You can find further information on the various different frame types in Address space
(Page 104).
Note
Interface X142
If you have particularly strict requirements for the digital input/outputs, use the digital
input/outputs at interface X142. The digital inputs/outputs can be operated in isochronous
mode and allow very short response times.
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SIMATIC Drive Controller
System Manual, 11/2019, A5E46600094-AA