Measurement Computing DAQFlex User Guide - Manual (Page 19)

DAQFlex Software User's Guide Using DAQFlex Software
19
' Stop the counter
MyDevice.SendMessage("CTR{0}:STOP")
Catch Ex As Exception
' handle error
Label1.Text = Ex.Message
End Try
Reading hardware-paced I/O
The basic approach to programming analog input scans is to set the device's scan properties, send the
START command, and call the ReadScanData() method. The following examples show how to program a
basic input scan.
C#
try
{
double[,] scanData;
string[] names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno);
DaqDevice device = DaqDeviceManager.CreateDevice(names[0]);
device.SendMessage("AISCAN:LOWCHAN=0");
device.SendMessage("AISCAN:HIGHCHAN=0");
device.SendMessage("AISCAN:RATE=1000");
device.SendMessage("AISCAN:SAMPLES=5000");
device.SendMessage("AISCAN:START");
scanData = device.ReadScanData(5000, 0);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
VB
Try
Dim ScanData As Double(,)
Dim Names As String()
Dim Device As DaqDevice
Names = DaqDeviceManager.GetDeviceNames(DeviceNameFormat.NameAndSerno)
Device = DaqDeviceManager.CreateDevice(Names(0))
Device.SendMessage("AISCAN:LOWCHAN=0")
Device.SendMessage("AISCAN:HIGHCHAN=0")
Device.SendMessage("AISCAN:RATE=1000")
Device.SendMessage("AISCAN:SAMPLES=5000")
Device.SendMessage("AISCAN:START")
ScanData = Device.ReadScanData(5000, 0)
Catch ex As Exception
Console.WriteLine(ex.Message)
End Try