National-instruments Module SCXI-1503 Manuale Utente Scaricare il pdf (Pagina 55)

Chapter 5 Using the SCXI-1503

SCXI-1503 User Manual 5-12 ni.com

Note Refer to the NI LabWindows/CVI Help for more information on creating NI-DAQmx

tasks in LabWindows/CVI and NI-DAQmx property information.

Measurement Studio (Visual Basic 6, .NET, and C#)

When creating an voltage measurement task in Visual Basic 6, .NET and

C#, follow the general programming flow in Figure 5-1. You can then use

the appropriate function calls to modify the task. This example creates a

new task and configures an NI-DAQmx voltage measurement channel on

the SCXI-1503. You can use the same functions for Visual Basic 6, .NET

and C#.

The following text is a function prototype example:

void AIChannelCollection.CreateVoltageChannel(

System.String physicalChannelName,

System.String nameToAssignChannel,

System.Double minVal,

System.Double maxVal);

To actually create and configure the channel, you would enter something

resembling the following example code:

Task myTask = new

NationalInstruments.DAQmx.Task(“myTaskName”);

MyTask.DAQmxCreateAIVoltageChan (

“SC1Mod1/ai0”, // System.String physicalChannelName

“Voltage0”, // System.String nameToAssignChannel

-10.0, // System.Double minVal

10.0); // System.Double maxVal

// setting attributes after the channel is created

AIChannel myChannel = myTask.AIChannels[“Voltage0”];

myChannel.AutoZeroMode = kAutoZeroTypeOnce;

Modify the example code above or the code from one of the shipping

examples as needed to suit your application.

Note You can create and configure the voltage measurement task in MAX and

load it into your application with the function call

NationalInstruments.DAQmx.DaqSystem.Local.LoadTask.

Refer to the NI Measurement Studio Help for more information on creating NI-DAQmx

tasks in LabWindows/CVI and NI-DAQmx property information.

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National-instruments Module SCXI-1503 Manuale Utente Pagina 55