National Instruments Module SCXI-1125 Manual de usuario descargar pdf (Pagina 49)

Chapter 5 Using the SCXI-1125

SCXI-1125 User Manual 5-12 ni.com

7. Change the property to read or write to either get the property or write

a new value. Right-click the property, go to Change To, and select

Write, Read, or Default Value.

8. After you have added the property to the property node, right-click the

terminal to change the attributes of the property, add a control,

constant, or indicator.

Figure 5-2. LabVIEW Channel Property Node with Lowpass Frequency Set at 10 kHz

on Channel SC1Mod1/ai0

9. To add another property to the property node, right-click an existing

property and left-click Add Element. To change the new property,

left-click it and select the property you wish to define.

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-1125 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/ch0

• multiple, noncontinuous channels—for example SC1Mod1/ch0,

SC1Mod1/ch4

• multiple continuous channels—for example SC1Mod1/ch0:4

(channels 0 through 4)

• cold junction channel—

SC1Mod1/_cjtemp

When you have a task containing SCXI-1125 channels, you can set the

properties of the channels programmatically using the DAQmx Channel

Property Node.

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National Instruments Module SCXI-1125 Manual de usuario Pagina 49