B&B Electronics 4 Channel Input Buffer Board SDAIBB Manuel d'utilisateur télécharger pdf (Page 53)

Documentation Number UD128A8D4602 Manual Chapter 5 49

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Dim Ain0 As BDaq.BBIoPoint

Set Ain0 = Device1.IOPoints(AD_0)

Now any property or method that used to be addressed by

Device1.IOPoints(AD_0) can be directly addressed by ain0.

Dim Reading as Long

Reading = Ain0.Value

This would produce the same result as:

Dim Reading as Long

Reading = Device1.IOPoints(AD_0).Value

Hardware Timed Reading of Analog Inputs

Any number of Analog Input I/O Points can be read based on a

single sampling period. To configure a Device to do timed sampling:

‘ \ 1. Set each Analog Input I/O Point for Single-Ended or Differential

as needed through it’s Configuration property.

Device1.IOPoints(AD_0).Configuration = AD_12BIT_SE

‘ \ 2. Add the I/O Point to the list of sampled I/O Points by setting its

SamplingEnabled property to True.

Device1.IOPoints(AD_0).SamplingEnabled = True

‘ \ 3. Set the time between samples by setting the Device’s

SamplingInterval property. The SamplingInterval property is in

seconds

Device1.SamplingInterval = 0.006

‘ \ This sets sampling all enabled channels every 6 milliseconds.

‘ \ 4. Start the sampling by setting the Device’s SamplingEnabled

property to True. Stop sampling when needed by setting to False

Device1.SamplingEnabled = True

Device1.SamplingEnabled = False

‘ \ 5. Wait for the Device’s OnDataAvailable event.

Private Sub Device1_OnDataAvailable()

‘\ get the data here

End Sub

When the OnDataAvailable event occurs, get the data. Do this using

the GetSamples method for the Device.

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B&B Electronics 4 Channel Input Buffer Board SDAIBB Manuel d'utilisateur Page 53