Chapter 7 Counters
© National Instruments Corporation 7-31 M Series User Manual
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. M 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.
Counter Triggering
Counters support three different triggering actions—arm start, start, and
pause.
Arm Start Trigger
To begin any counter input or output function, you must first enable, or arm,
the counter. Software can arm a counter or configure counters to be armed
on a hardware signal. Software calls this hardware signal the Arm Start
Trigger. Internally, software routes the Arm Start Trigger to the Counter n
HW Arm input of the counter.
For counter output operations, you can use it in addition to the start and
pause triggers. For counter input operations, you can use the arm start
CTR 0 B 45 (PFI 10)
CTR 1 SRC 42 (PFI 3)
CTR 1 GATE 41 (PFI 4)
CTR 1 AUX 46 (PFI 11)
CTR 1 OUT 40 (PFI 13)
CTR 1 A 42 (PFI 3)
CTR 1 Z 41 (PFI 4)
CTR 1 B 46 (PFI 11)
FREQ OUT 1 (PFI 14)
Table 7-4. 68-Pin Device Default NI-DAQmx Counter/Timer Pins (Continued)
Counter/Timer Signal
Default Connector 0 Pin
Number (Name)
To Next Page
Loading...
Need help?
General
