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DE-M080801E • DEWE-ORION-0824-20x • Technical Reference Manual • Printing version 1.1.2 • March 19, 2014
DEWE-ORION-0824-20x
3.2 Counter input
3.2.1 Counter applications
As mentioned above each counter block is equipped with three inputs. With this three inputs the following
applications can be done:
• Event Counting
• Gated Event Counting
• Up/Down Counter
• Frequency Measurement
• Period Time Measurement
• Pulse Width Measurement
• Two Pulse Edge Separation
• Quadrature Encoder (X1, X2, X4, A-Up/B-Down)
3.2.1.1 Event Counting
In Event Counting the counter counts the number of pulses that occur on counter source. At every sample
clock the counter value is read without disturbing the counting process.
Figure 12 shows an example of event counting where the counter counts eight events on
Counter Source
.
Synchronized Value
is the value read by the DEWE-ORION-0824-20x board at
Sample Clock
(encircled
numbers in the figure, e.g.
1
,
2
).
1
2
3
4
5
6
7
8
0
2
5
6
7
7
Sample Clock
Counter Source
Counter Value
Synchronized Value
1
2
3
4
5
6
Figure 12: Event Counting
If counting at falling edges is necessary, the input signal has to be inverted. This can be done directly on
the ORION-EXP-CNT8 by selecting inverted input.
Summary of Contents for DEWE-ORION-0824-20 Series
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