How to simultaneously write to and read from digital DAQ lines

Hi I use NI PXI-6256

And I would like to write a digital waveform to Line 16 to line 31 and simultaneously monitor line 0 and start acquiring after detecting the first rising edge. I think I should read before write to be able to capture events but I don;t know how to set the DAQmx functions and what to do for sample clock. Can I set both read and write to Internal Clock?

Could you please help me on this?

Thanks