Interval Counter Input - Siemens SIMATIC SM 335 Manual

Interval Counter Input

Purpose
With an interval counter, you can measure the number of intervals (continuous
counter from 0 to 255) and the duration of an interval.
You can use this data to calculate a speed, for example, if you know the path cov-
ered during the interval.
You can also acquire signals from simple rotary sensors and determine the rota-
tional speed from the interval duration.
Alternatively, you can use the number of intervals to measure positions or the num-
ber of intervals per time unit to measure speeds.
Principle
You can acquire the following with the interval counter input:
• Number of intervals
• Duration of an interval
In this chapter
We deal with the following topics in this chapter
Principle of an interval counter
Principle of measuring with an interval counter
Wiring the interval counter input
Parameterizing the SM 335 interval counter input
Values of the interval counter
Example of determining a rotational speed with the interval
counter
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
Topic
4
Section
4.1
4.2
4.3
4.4
4.5
4.6
4-1