Chapter 11
VirtualBench-Counter
© National Instruments Corporation
11-5
Getting Started with VirtualBench
4.
Measure phase difference. This feature works only with devices that
have NI-TIO based counters.
a.
Connect the first signal (A) to the AUX_LINE/UP_DOWN input
of the counter that you specified in Step 1 and connect the second
signal (B) to the GATE input of the counter you specified in
Step 1. Refer to the user manual of your DAQ device for details or
select Windows»Connections on the front panel for the correct
pin numbers.
b.
Click the Phase Difference button in the measurement mode
selector. VirtualBench-Counter continuously acquires and
displays the measurement in the display window.
c.
If the counter display shows Timeout, confirm that the amount of
time to take the number of samples you want is not greater than
your measurement time. If the counter display shows Overflow,
confirm that your measurement time is short enough to limit the
number of edges the counter receives to less than its maximum
value (2
number of bits
).
d.
Click Run to stop the measurement.
5.
Measure frequency ratio. This feature works with devices with either
DAQ-STC or NI-TIO based counters.
a.
Connect the first signal (A) to the SOURCE input of the counter
that you specified in Step 1 and connect the second signal (B) to
the SOURCE input of the other counter in the counter pair of the
counter that you specified in Step 1. Refer to the user manual of
your DAQ device for details or select Windows»Connections on
the front panel for the correct pin numbers.
b.
Click the Frequency Ratio button in the measurement mode
selector. VirtualBench-Counter continuously acquires and
displays the measurement in the display window.
c.
If the counter display shows Timeout, confirm that the amount of
time to take the number of samples you want is not greater than
your measurement time. If the counter display shows Overflow,
confirm that your measurement time is short enough to limit the
number of edges the counter receives to less than its maximum
value (2
number of bits
).
d.
Click Run to stop the measurement.
6.
Measure position or speed. This feature works with devices with either
DAQ-STC or NI-TIO based counters.
a.
Connect the A Channel of the Encoder to the SOURCE input of
the counter that you specified in Step 1 and connect the B Channel
