USB 6259 DAQ express rate of digital output issue

[veritas]

Hello,

         I have a fairly basic question.  I'm using the USB 6259 NI DAQ, and I'm tried to use both the digital and analog output options on the DAQ express to generate a step voltage to activate a small motor.  I am able to activate the motor, but the duration of the pulse is longer than I want. It lasts for around 500ms and I want it to go for about 25ms.  No matter what I do (ie. make the loop simplier) it still takes about 500ms.  I'm assuming that the computer can output MUCH faster than 500ms, and thus I have a feeling the DAQ express controls the duration of the output..but the trigging options are unavaiable (i.e. they are unclickable).

thank you.

veritas

[TCPlomp]

Express VIs are not suitable for timed DIO.

Take a look at the DAQmx examples.

Esp. Correlated Dig Read with Counter.VI (under Hardware Input and Output\Daqmx\Digital Measurements)

TOn