Справочник Пользователя для National Instruments 321645c-01
Chapter 2
Function Reference — AO_Configure
NI-DAQ FRM for PC Compatibles
2-38
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National Instruments Corporation
AO_Configure
Format
status = AO_Configure (deviceNumber, chan, outputPolarity, intOrExtRef, refVoltage,
updateMode)
Purpose
Informs NI-DAQ of the output range and polarity selected for each analog output channel on
the device and indicates the update mode of the DACs. If you have recorded an analog output
configuration that is not a default through the NI-DAQ Configuration Utility, you do not need
to use
the device and indicates the update mode of the DACs. If you have recorded an analog output
configuration that is not a default through the NI-DAQ Configuration Utility, you do not need
to use
AO_Configure
because NI-DAQ uses the settings recorded by the NI-DAQ
Configuration Utility. If you have a software-configurable device, you can use
AO_Configure
to change the analog output configuration on the fly.
Caution
For the AT-AO-6/10, NI-DAQ records the configuration information for output
polarity and update mode in channel pairs. A call to
polarity and update mode in channel pairs. A call to
AO_Configure
records the
same output polarity and update mode selections for both channels in a pair.
Parameters
Input
Parameter Discussion
chan is the analog output channel number.
Range:
0 or 1 for the AO-2DC, Lab and 1200 Series analog output devices, and MIO
devices.
0 through 5 for the AT-AO-6.
0 through 9 for the AT-AO-10.
0 through 47 for the VXI-AO-48XDC.
0 for DAQArb 5411 devices.
devices.
0 through 5 for the AT-AO-6.
0 through 9 for the AT-AO-10.
0 through 47 for the VXI-AO-48XDC.
0 for DAQArb 5411 devices.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
chan
i16
analog output channel number
outputPolarity
i16
unipolar or bipolar
intOrExtRef
i16
reference source
refVoltage
f64
voltage reference value
updateMode
i16
when to update the DACs
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