User manual

Chapter 3 Software Overview
NI-DAQ User Manual for PC Compatibles 3-16 ni.com
One-Shot Analog Input Functions
Single-Channel Analog Input Functions
Use the single-channel Analog Input functions for analog input on the
516 devices, DAQCard-700, analog input Lab and 1200 devices, MIO and
AI devices, and LPM devices.
Refer to the NI-DAQ Function Reference Online Help file to determine
which functions your device supports.
AI_Check
Returns the status of the analog input
circuitry and an analog input reading if one
is available.
AI_Check
is intended for use
when A/D conversions are initiated by
external pulses applied at the appropriate
pin; see
DAQ_Config
in the NI-DAQ
Function Reference Online Help file
for information on enabling external
conversions.
AI_Clear
Clears the analog input circuitry and
empties the FIFO memory.
AI_Change_Parameter
Selects a specific parameter setting for
the analog input section or analog input
channel. Use this to set the coupling for
AI channels.
AI_Configure
Informs NI-DAQ of the input mode
(single-ended or differential), input range,
and input polarity selected for the device.
Use this function if you change the jumpers
affecting the analog input configuration
from their factory settings. For the E Series
devices which have no jumpers for analog
input configuration, this function programs
the device for the settings you want. For
the E Series devices you can configure the
input mode and polarity on a per channel
basis. Also use
AI_Configure
to specify
whether to drive AISENSE to onboard
ground.