Chapter 5 Programming
© National Instruments Corporation 5-7 SCXI-1121 User Manual
Scanning Measurements
Programming for scanned data acquisition involves programming your
data acquisition board, modules, and Slot 0. In general, the steps to be taken
are as follows:
1. Perform all data acquisition board programming to the point of
enabling the data acquisition.
2. Perform all module programming.
3. Program the Slot 0 hardscan circuitry.
4. Enable the data acquisition, trigger it either through software or
hardware, and service the data acquisition.
The MIO and Lab-PC+ boards can do all types of scanning. Lab-NB,
Lab-PC, Lab-PC+, Lab-LC, and PC-LPM-16 boards support only
single-module parallel scanning, and do not support any of the multiplexed
scanning modes. Notice that single-module parallel scanning is typically
done without any module or Slot 0 programming only programming the
data acquisition board is necessary.
1. Data Acquisition Board Setup Programming
The programming steps for your data acquisition board are given in your
data acquisition board user manual. You should follow the instructions in
the following sections:
•AT-MIO-16 User Manual
–Multiple A/D Conversions with Continuous Channel Scanning
(Round Robin)
–Multiple A/D Conversions with Interval Channel Scanning
(Pseudosimultaneous)
•AT-MIO-16D User Manual
–Multiple A/D Conversions with Continuous Channel Scanning
(Round Robin)
–Multiple A/D Conversions with Interval Channel Scanning
(Pseudosimultaneous)
•AT-MIO-16F-5 User Manual
–Posttrigger Data Acquisition with Continuous Channel Scanning
–Posttrigger Data Acquisition with Interval Channel Scanning