User's Manual

NI cDAQ-9172 User Guide and Specifications 28 ni.com
Getting Started with AI Applications in Software
You can use the NI cDAQ-9172 chassis in the following analog input
applications:
• Single-Point
•Finite
• Continuous
For more information about programming analog input applications and
triggers in software, Refer to the NI-DAQmx Help or the LabVIEW Help in
version 8.0 or later for more information.
The NI-DAQmx Help is available after installation from Start»
All Programs»National Instruments»NI-DAQ»NI-DAQmx Help.
To view the LabVIEW Help, in version 8.0 or later, select Help»
Search the LabVIEW Help in LabVIEW. Alternately, to download
the LabVIEW Help, go to
ni.com/manuals.
Analog Output
To generate analog output, insert an analog output C Series I/O module in
any slot on the NI cDAQ-9172 chassis. The generation specifications, such
as the number of channels, channel configuration, update rate, and output
range, are determined by the type of C Series I/O module used. For more
information, refer to the documentation included with your C Series I/O
modules.
You can run one hardware-timed (waveform) analog output task at a time
on the NI cDAQ-9172 chassis, with up to 16 waveform channels. At the
same time, you can also run one or more software-timed (single-point or
immediate) tasks.
For each analog output module, you can either:
• Assign all of the channels on the module to the hardware-timed task.
• Assign all of the channels on the module to one or more
software-timed tasks.
On a single AO module, you cannot assign some channels to a
hardware-timed task and other channels (on the same module) to
a software-timed task.
Analog Output Data Generation Methods
When performing an analog output operation, you either can perform
software-timed or hardware-timed generations. Hardware-timed
generations must be buffered.