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Chapter 7 Counters
© National Instruments Corporation 7-31 NI 6238/6239 User Manual
Routing Frequency Output to a Terminal
You can route Frequency Output to any output PFI <6..9> terminal. All
PFIs are set to high-impedance at startup.
Default Counter Terminals
By default, NI-DAQmx routes the counter/timer inputs and outputs to the
PFI pins, shown in Table 7-4.
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 8.x Help for more information on
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 8.x Help.
Table 7-4. NI 6238/6239 Device Default NI-DAQmx Counter/Timer Pins
Counter/Timer Signal Default Pin Number (Name) Port
CTR 0 SRC 13 (PFI 0) P0.0
CTR 0 GATE 32 (PFI 1) P0.1
CTR 0 AUX 33 (PFI 2) P0.2
CTR 0 OUT 17 (PFI 6) P1.0
CTR 0 A 13 (PFI 0) P0.0
CTR 0 Z 32 (PFI 1) P0.1
CTR 0 B 33 (PFI 2) P0.2
CTR 1 SRC 15 (PFI 3) P0.3
CTR 1 GATE 34 (PFI 4) P0.4
CTR 1 AUX 16 (PFI 5) P0.5
CTR 1 OUT 36 (PFI 7) P1.1
CTR 1 A 15 (PFI 3) P0.3
CTR 1 Z 34 (PFI 4) P0.4
CTR 1 B 16 (PFI 5) P0.5