NI-PCI 8431

Hello,

I have a problem of writing frames with fixed frequency 200Hz(5mS) using the NI PCI-8431/2  and  LABVIEW 2013.

I cannot get frames with constant frequency 200Hz(5mS). The frequency is changed during communication.

Why?

Please open enclosed vi and scope picture from the port output of the NI-PCI-8431.

Thanks.