cDAQ hardware interrupt through DIO module NI-9401 or NI-9403 with cDAQ-9178 chassis

Hello.  

I am trying to monitor a digital pulse that is infrequent and is ~100ms in duration.  My system polls the input and will sometimes miss the pulse.  I have been unable to find a method to use this input as an interrupt so that I do not miss it.  My hardware is a cDAQ-9178 chassis and either a NI-9401 or NI-9403 DIO module.

Reason that I am missing the pulse is that I am also using a NI-9217 RTD module and reading all four channels in high-resolution mode takes ~800ms.  During the NI-9217 read the pulse often occurs and is missed.

Is there a simple method to switch from polling this digital input to an interrupt?

Thanks

Dan