Why am I unable to set the "HWDigitalTriggerSource" property for an Analog Output object created using Traditional NI-DAQ in Data Acquisition Toolbox?

I am using an National Instruments Board which supports hardware triggering for Analog Output (eg. PCI-MIO-16E-4, PCI-MIO-16E-1, PCI-6110, PCI-6013 etc.). I want to implement hardware triggering on the Analog Output object created in MATLAB Data Acquisition Toolbox 2.11 (R2007b) using Traditional NI DAQ. However when I use the following code:

ao = analogoutput('nidaq',2);

set(ao,'TriggerType','HWDigital');

set(ao,'HWDigitalTriggerSource','PFI0');

I receive the following error:

 Error using --> daqdevice.set at 259

 Invalid property: 'HwDigitalTriggerSource'

When I run the GET function on the Analog Output object as follows:

get(ao)

I do not see the "HWDigitalTriggerSource" property.

 >> get(ao)

         BufferingConfig = [64 2]

         BufferingMode = Auto

         Channel = [1x1 aochannel]

         ClockSource = Internal

         EventLog = [1x0 struct]

         InitialTriggerTime = [0 0 0 0 0 0]

         MaxSamplesQueued = 2.66063e+008

         Name = nidaq2-AO

         RepeatOutput = 0

         Running = Off

         RuntimeErrorFcn = @daqcallback

         SampleRate = 1000

         SamplesAvailable = 0

         SamplesOutput = 0

         SamplesOutputFcn = []

         SamplesOutputFcnCount = 1024

         Sending = Off

         StartFcn = []

         StopFcn = []

         Tag = 

         Timeout = 1

         TimerFcn = []

         TimerPeriod = 0.1

         TriggerFcn = []

         TriggersExecuted = 0

         TriggerType = HwDigital

         Type = Analog Output

         UserData = []

         NIDAQ specific properties:

         OutOfDataMode = Hold

         TransferMode = SingleDMA

Answer 1

[MathWorks Support Team]

For data acquisition objects created using Traditional NI-DAQ, the "HWDigitalTriggerSource" property is only implemented for the Analog Input object and not for the Analog Output object.

In order to achieve digital triggering for an Analog Output object, use NI-DAQmx to create the Analog Output object for any National Instruments board that supports hardware triggering.

Otherwise, if hardware triggering on an Analog Output object created using Traditional NI-DAQ has to be implemented, then you must connect the hardware trigger line to the "PFI6" pin.