Configuring Event/Period Measurement Operating Mode - Siemens SIMATIC S7-1500 System Manual

9.9.7

Configuring event/period measurement operating mode

Event/period duration measurement
In isochronous mode, you can use the event/period duration measurement operating mode
to acquire the number of rising edges at the digital input and at the same time determine the
period duration.
Note
Isochronous mode
The event/period duration measurement requires isochronous mode.
Event counter
With the event measurement, you count the number of rising edges at the digital input. The
current count (16-bit value) is updated on the feedback interface with each application cycle
(e.g. servo clock).
• The event counter is a rotary counter.
• An event counter overflow is not displayed.
• To determine the number of rising edges per application cycle, the difference between the
current count and the previous count must be calculated by the application, taking into
account any overflow.
SIMATIC Drive Controller
System Manual, 11/2023, A5E46600094-AD
9.9 Configuration of digital inputs/outputs (X142)
Configuring
181