National Instruments NI 6013, NI 6014 - page 88

AppendixC CommonQuestions
©NationalInstruments Corporation C-7 NI6013/6014 User Manual
TableC-1 corresponds the hardware signal names to the software signal
namesin LabV IEWand NI-DAQ.
Whata rethe power-on states of the PFI and DIO lines on the I/O
connector?
Atsystem power-on and reset, both the PFI and DIO lines are set to
high-impedance bythe hardware. This setting m eans that the device
circuitry is not activelydriving the output either high or low. However,
these lines may havepull-up or pull-down resistors connected to them as
showninTable4-3,I/OSignal Summary for the NI 6013/6014.These
resistorsweakly pull the output to either a logic-high or logic-low state.
Forexample, DIO<0> is in the high-impedance state after poweron, and
Table4-3, I/O Signal Summary for the NI 6013/6014,showsthe1.5kΩ
pull-downresistor. This pull-down resistor sets the DIO<0> pin to a logic
lowwhen the outp ut is in a high-impedance state.
TableC-1. Signal Name Equivalencies
Hardware
Signal Name
LabVIEW
RouteSignal NI-DAQSelect_Signal
TRIG1 AIStart Trigger ND_IN_START_TRIGGER
TRIG2 AIStop Trigger ND_IN_STOP_TRIGGER
STARTSCAN AIScan Start ND_IN_SCAN_START
SISOURCE —ND_IN_SCAN_CLOCK_TIMEBASE
CONVERT* AIConvert ND_IN_CONVERT
AIGATE —ND_IN_EXTERNAL_GATE
WFTRIG AOStart Trigger ND_OUT_START_TRIGGER
UPDATE* AOUp date ND_OUT_UPDATE
UISOURCE —ND_OUT_UPDATE_CLOCK_TIMEBASE
AOGATE —ND_OUT_EXTERNAL_GATE