Chapter 7
Counters
7-30
ni.com
With pulse or pulse train generation tasks, the counter drives the pulse(s) on
the Counter
n
Internal Output signal. The Counter
n
Internal Output signal
can be internally routed to be a counter/timer input or an “external” source
for AI, AO, DI, or DO timing signals.
Routing Counter
n
Internal Output to an Output
Terminal
You can route Counter
n
Internal Output to any PFI <0..15> or
RTSI <0..7> terminal. All PFIs are set to high-impedance at startup.
Frequency Output Signal
The Frequency Output (FREQ OUT) signal is the output of the frequency
output generator.
Routing Frequency Output to a Terminal
You can route Frequency Output to any PFI <0..15> terminal. All PFIs are
set to high-impedance at startup. The FREQ OUT signal also can be routed
to DO Sample Clock and DI Sample Clock.
Default Counter/Timer Pinouts
By default, NI-DAQmx routes the counter/timer inputs and outputs to the
PFI pins. Refer to Appendix A,
, for the default
counter/timer pin table for your device.
You can use these defaults or select other sources and destinations for the
counter/timer signals in NI-DAQmx. Refer to
Connecting Counter Signals
in the
NI-DAQmx Help
or the
LabVIEW Help
in version 8.0 or later for
more information about how to connect your signals for common counter
measurements and generations. DAQ-STC2-based S Series default PFI
lines for counter functions are listed in
Physical Channels
in the
NI-DAQmx Help
or the
LabVIEW Help
in version 8.0 or later.
