Counter Input Measurements; Edge Counting - NI C Series Getting Started

Counter Input Measurements

Edge Counting

You can take edge counting measurements with the NI-9361.
The counter counts the number of active edges on a signal. The NI-9361 returns the
current count value when the counter is read. The following figure shows an
example of edge counting.
Figure 8. Edge Counting
Counter Armed
Signal to Measure
Counter Value 0 1
Read Value
Channel Settings
You can configure the following counter properties:
Input terminal of the signal-to-measure.
■
The initial value of the count.
■
The active edge, rising or falling, that is counted.
■
Count direction to increment or decrement the counter on each edge—You
■
can set this property to:
Count Up
■
Count Down
■
Externally Controlled
■
Note
hardware signal to determine the count direction. When the signal is
high, the counter counts up; when the signal is low, the counter
counts down. You can set which signal to monitor.
Counter Read Counter Read
2 3 4
3
If you select Externally Controlled, the NI-9361 monitors a
5
5
NI-9361 Getting Started
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