daqmx write

[IanG]

Hi anyone

I am trying to set the pulsewidth and period of a continuous pulse train on the fly. I looked at an advanced example given in the advanced data acquisition series on the zone.ni.com site that demostrates the changing of the duty cycle of a continuous pulse train on the fly.

I adapted this example to try do it on a pulse train specified as a time channel (only real difference), and keep on getting a 200459 error ("write failed - because there are no output channels on this task") coming from the DAQmx write block. Is this a bug? Or have I done something wrong?

(The vi's are attached)

IanG

[IanG]

Sorry - my error. I did not connect the "continuous" box to the DAQmx timing control.

[AlanArmstead]

Hello Ian,

I'm glad you got your program up and running.  For anyone else reading this thread, the tutorial Ian mentioned is here:  Advanced Data Acquisition Series – Pulse Width Modulation in NI LabVIEW Using NI-DAQmx
-Alan A.