[USB-2408 Compatibility With ULx LabVIEW Drivers]

Here is what I found about controlling the acquisition rate. 

1. Instacal must be used to set the maximum rate. This also sets the onboard filtering.
2. LabVIEW must be completely closed and then relaunched in order to "use" the new acquisition rate
3. The ULx timer vi may be used to run at a lower than max acquisition rate.
4. The calculation 1/(1/(max Hz) + 640us) sets the max rate the timer vi can use for a single channel.  i.e. 1ch@ 3750Hz => 1103Hz is the max rate the ULx timer vi can use.

[USB-2408 Compatibility With ULx LabVIEW Drivers]

19 hours ago, Fausto said:

Hello @Jon Morris.

With a USB-2408 (and USB-2416 Series), a user must configure the channel types (whether it be voltage and/or temperature) in InstaCal.  Take a look at the LabVIEW example attached to this Reference Document.  The example can be used to measure both voltage and temperature.

https://digilent.com/reference/daq-and-datalogging/documents/usb-2416-usb-2408-with-labview

 

Regards,

Fausto

Thanks for the reply.  We did figure out to use AI voltage read rather that temperature.  However, we missed controlling the HW clock acquisition rate through LV rather than Instacal.

We are only using one channel and so would like to get the maximum rate of 3750 Hz.  The vi errors out indicating the max rate for this device is 378 Hz.  Any suggestions here?

[USB-2408 Compatibility With ULx LabVIEW Drivers]

I am trying to use the ULx drivers with the USB-2408.  ULx recognized the device and channels but throws an error when trying to read the temperature (TC) measurement.  The error says that "the hardware does not support temperature measurement".  This device has a native TC measurement and linearization function that seems cannot be accessed by ULx.  Is that true?

[UL Function Call error with legacy project - MCC elders please help.]

You the man Jeff!  I found another copy of cbw32.dll in System32.  After deleting, I get past the error.

Thanks a million.

Sincerely,

Jon Morris

[UL Function Call error with legacy project - MCC elders please help.]

Thanks for your reply Jeff.  I was careful to ensure no multiple copies of the DLL but will do the search as you suggest.

Sincerely,

Jon Morris

[UL Function Call error with legacy project - MCC elders please help.]

Using VB6 on a legacy project with MCC USB-ctr04.  Migrating from XP to Win7.

ULStat = cbDConfigPort(mlngBoardNum, PortNum, Direction) returns a value of 1.  Error checking shows a dialog saying "invalid board number".  Instacal identifies the board as 0 yet I still get this error.  Any suggestions?

Relevant Code:

' configure and initialize DIO/ Timer board
    ' declarations
    Dim ReportError As Long, HandleError As Long
    Dim PortNum, Direction, ULStat As Long
    ReportError = PRINTALL
    HandleError = DONTSTOP
    PortNum = 1
    Direction = DIGITALOUT
    ' configure error handling
    If gblnSimulateDAQ = False Then
        ULStat = cbErrHandling(ReportError, HandleError)
        If ULStat <> 0 Then Stop
        ' configure port as digital outputs
        ULStat = cbDConfigPort(mlngBoardNum, PortNum, Direction)
        If ULStat <> 0 Then End
        ULStat = cbDOut(mlngBoardNum, PortNum, 7)
        If ULStat <> 0 Then Stop
        ULStat = cbPulseOutStop(mlngBoardNum, 0)
        If ULStat <> 0 Then Stop
    End If

Thanks for your assistance,

Jon Morris

AVID Innovation