Max Update Rate of NI 9375 Digital Outputs

[JamesJD]

I have a NI 9375 module in a cDAQ-9174 connected to a Windows 8 PC running LabView 2012 with service Pack 1.

No matter what I do, I cannot get the digital outputs of the NI 9375 to update faster than 48 per second.

I need to generate a 40 Hz square wave.

Am I missing some configuration settings?  What can I do to double the update rate?

James

[MarkGrot]

If you use hardware timing, you can update the 9375 outputs at up to 2kHz.

If you are not using hardware timing, I would guess that you have create channel followed by write in a loop.  This causes the task to be recommitted after every write.  If this is your setup, call DAQmx Start before your write.