How to save PC resource where using DAQmx ??

I have a DAQ 6519.
It is function is to monitor the motor if it in the correct position.(less than 5 micron)
The position may change although the I did not send the command to move the motor(servo motor).
 
That's why I need to always to poll the DAQ.
It make the computer response very low.
 
How to solve such a problem ???
 
Can DAQ return the status I need in stead of poll by myself?
 
.

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