USB-6009 slow output signals using SignalExpress - Error 200077

[SteveAllen]

We have a USB-6009 board and Signal Express ver. 3.5.0

We want to generate low frequency outputs, both analog and digital to simulate some slow moving processes.

We have created the signals and generated them as outputs, put when we RUN the project, we get the Error 200077, which seems to indicate that we need to use On Demand signal timing. 

If we select On Demand, then the DAQmx Generate says we have a missing input.

So, what method should we use with the USB-6009 to generate slow (.01Hz and slower) analog and digital outputs?

These are 2 of the projects we have tried - using On Demand, N Samples, Continuous, external and internal triggering, etc.

Thanks in adavance for your assistance...

[ColeTrain · Accepted solution]

Welcome to the forums Steve,

I've got good news for you.  I played around with the sweep and actually got some code geared up to generate a slow signal.  I went and tested it with the 6009 and it was able to run without any errors.  I have it attached here, but so you don't have to open it (or anyone else in the future), here are some screen shots of how it's working.  If this works, feel free to make the forum as solved so others can locate a solution a little easier in the future.

Sweep Configuration:


DAQmx Config:

[wildcatherder]

It sure would be nice to know how the frequency is supposed to be set in this slow signal generator.  The screen display shows iterations rather than time, so no clue there.