Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 189)

Putting it all together
The following table shows a number of different scenarios (each assumes a total scan count of 1,000,000
output updates). These scenarios are representative of some typical waveform/pattern output states but do not
necessarily represent all of the possible states.
States (active) Progress
(retCount)
Description
DdafWaveformActive +
DdafWaveformTriggered +
DdafTransferActive 210,000 The waveform/pattern output is active and has been triggered and is
currently outputting updates to the DAC/Digital Output ports
specified. A transfer to buffer is also active and a total of 210,000
updates have been output so far.
DdafWaveformActive +
DdafTransferActive 0 The waveform/pattern output has been armed but has not yet been
triggered. A transfer to buffer is also active but no updates have been
output so far because the trigger event has not yet occurred.
DdafTransferActive 0 A waveform/pattern output transfer has been configured and started
(daqAdcTransferSetBuffer, daqDacTransferStart)
but the acquisition has not yet been armed. The acquisition needs to
be armed using daqDacWaveArm.
(0) 1,000,000 The waveform/pattern output has triggered and has completed. The
transfer is not active and 1,000,000 updates have been performed. So
the both the transfer and the waveform/pattern output from the device
are complete.
Prototypes
C/C++
daqDacTransferGetStat(DaqHandleT handle, DaqDacDeviceType deviceType,
DWORD chan, PDWORD active, PDWORD retCount);
Visual BASIC
VBdaqDacTransferGetStat&(ByVal handle&, ByVal deviceType&, ByVal chan&,
active&, retCount&)
Program References
None
Programmer’s Manual 908494 Daq API Command Reference 4.4-7