Chapter 5
Using the SCXI-1503
©
National Instruments Corporation
5-11
Note
Refer to the
LabVIEW Help
for information about property nodes and specific
NI-DAQmx properties.
Specifying Channel Strings in NI-DAQmx
Use the channel input of
DAQmx Create Channel
to specify the
SCXI-1503 channels. The input control/constant has a pull-down menu
showing all available external channels. The strings take one of the
following forms:
•
single device identifier/channel number—for example
SC1Mod1/ai0
•
multiple, noncontinuous channels—for example
SC1Mod1/ai0
,
SC1Mod1/ai4
.
•
multiple continuous channels—for example
SC1Mod1/ai0:4
(channels 0 through 4)
When you have a task containing SCXI-1503 channels, you can set the
properties of the channels programmatically using the
DAQmx Channel
Property Node
.
Text Based ADEs
You can use text based ADEs such as LabWindows/CVI, Measurement
Studio, Visual Basic 6, .NET, and C# to create code for using the
SCXI-1503.
LabWindows/CVI
LabWindows/CVI works with the
DAQ Assistant
in MAX to generate
code for an voltage measurement task. You can then use the appropriate
function call to modify the task. To create a configurable channel or task in
LabWindows/CVI, complete the following steps:
1.
Launch LabWindows/CVI.
2.
Open a new or existing project.
3.
From the menu bar, select
Tools»Create/Edit DAQmx Tasks
.
4.
Choose
Create New Task In MAX
or
Create New Task In Project
to load the DAQ Assistant.
5.
The DAQ Assistant creates the code for the task based on the
parameters you define in MAX and the device defaults. To change
a property of the channel programmatically, use the
DAQmxSetChanAttribute
function.
