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Chapter 2 Function Reference — AI_Read_Scan
NI-DAQ FRM for PC Compatibles 2-14
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National Instruments Corporation
AI_Read_Scan
Format
status = AI_Read_Scan (AI_Read_Scan (deviceNumber, reading)
Purpose
Returns readings for all analog input channels selected by SCAN_Setup (E Series devices
only, with or without the SC-2040 accessory).
Parameters
Input
Output
Parameter Discussion
reading is an array of readings from each sampled analog input channel. The length of the
reading array is equal to the number of channels selected in the
SCAN_Setup numChans
parameter. Range of elements in reading depends on your device A/D converter resolution
and the unipolar/bipolar selection you made make for a given channel.
Using This Function
AI_Read_Scan samples the analog input channels selected by SCAN_Setup, at half the
maximum rate permitted by your data acquisition hardware.
Name Type Description
deviceNumber i16 assigned by configuration utility
Name Type Description
reading [i16] readings from each sampled analog input channel