National Instruments NI 6014 - Manual (Page 88)

Appendix C Common Questions
© National Instruments Corporation C-7 NI 6013/6014 User Manual
Table C-1 corresponds the hardware signal names to the software signal
names in LabVIEW and NI-DAQ.
What are the power-on states of the PFI and DIO lines on the I/O
connector?
At system power-on and reset, both the PFI and DIO lines are set to
high-impedance by the hardware. This setting means that the device
circuitry is not actively driving the output either high or low. However,
these lines may have pull-up or pull-down resistors connected to them as
shown in Table 4-3,
I/O Signal Summary for the NI 6013/6014 . These
resistors weakly pull the output to either a logic-high or logic-low state.
For example, DIO<0> is in the high-impedance state after power on, and
Table 4-3,
I/O Signal Summary for the NI 6013/6014 , shows the 1.5 k
Ω
pull-down resistor. This pull-down resistor sets the DIO<0> pin to a logic
low when the output is in a high-impedance state.
Table C-1. Signal Name Equivalencies
Hardware
Signal Name
LabVIEW
Route Signal NI-DAQ Select_Signal
TRIG1 AI Start Trigger ND_IN_START_TRIGGER
TRIG2 AI Stop Trigger ND_IN_STOP_TRIGGER
STARTSCAN AI Scan Start ND_IN_SCAN_START
SISOURCE — ND_IN_SCAN_CLOCK_TIMEBASE
CONVERT* AI Convert ND_IN_CONVERT
AIGATE — ND_IN_EXTERNAL_GATE
WFTRIG AO Start Trigger ND_OUT_START_TRIGGER
UPDATE* AO Update ND_OUT_UPDATE
UISOURCE — ND_OUT_UPDATE_CLOCK_TIMEBASE
AOGATE — ND_OUT_EXTERNAL_GATE