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Chapter 2 Function Reference — AI_Configure
NI-DAQ FRM for PC Compatibles 2-8
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National Instruments Corporation
Note If a device is software configurable, the inputMode, inputRange, and polarity
parameters are used to program the device for the configuration you want. If a
device is not software configurable, this function uses these parameters to inform
NI-DAQ of the device configuration, which you must set using hardware jumpers.
If your device is software configurable and you have changed the analog input
settings through the NI-DAQ Configuration Utility, you do not have to use
AI_Configure, although it is good practice to do so in case you inadvertently
change the configuration file maintained by the NI-DAQ Configuration Utility.
driveAIS, for the AT-MIO-64F-5 and AT-MIO-16X, indicates whether to drive AISENSE to
onboard ground or not. This parameter is ignored for all other devices.
0: Do not drive AISENSE to ground.
1: Drive AISENSE to ground.
Notice that if you have configured any of the input channels in nonreferenced single-ended
(NRSE) mode, this function returns a warning, inputModeConflict (18), if you set driveAIS
to 1. When NI-DAQ reads a channel in NRSE mode, the device uses AISENSE as an input to
the negative input of the amplifier, regardless of the driveAIS setting. When NI-DAQ reads
a channel in differential or referenced single-ended (RSE) mode, the device drives AISENSE
to onboard ground if driveAIS is 1.
LPM Devices
(RSE
inputMode
only)
ignored 5 unipolar 0 to +5 V No
(PC-LPM-16)
Yes
(PC-LPM-16PnP)
5 bipolar –2.5 to +2.5
V
10 unipolar 0 to +10 V
10 bipolar –5 to +5 V
516 Devices,
DAQCard-500
1 10 bipolar –5 to 5 V N/A
DAQCard-700 0, 1 5 bipolar –2.5 to +2.5
V
Yes
10 bipolar –5 to +5 V
20 bipolar –10 to +10 V
Table 2-1.
Parameter Settings for
AI_Configure
(Continued)
Device
Possible
Values for
inputMode
Analog Input Range
Software
Configurable
inputRange polarity
Resulting
Analog
Input
Range