cRIO with NI-DAQmx support has three programming modes
: Real-Time, Real-Time Scan, and FPGA. NI 986x
modules will only be usable in Real-Time mode, and no bit stream is necessary. Unlike legacy cRIO, they do not utilize the onboard FPGA. The NI-XNET device-driven DMA engine is included in the NI-DAQmx ASIC. You do not have to add NI-986x modules in the LabVIEW project. However, NI-986x modules will be populated if you discover an Existing target or device
with actual hardware.
You can detect the NI-986x modules in NI Measurement and Automation Explorer (MAX) under Devices and Interfaces
after you have installed NI-XNET and NI-DAQmx on the cRIO.
You might be seeing error -88705
saying the device is not present in NI MAX. As long as you can discover the actual hardware in the LabVIEW project, you can ignore this error.
If you are using legacy cRIO (not cRIO-904x or cRIO-905x), please refer to NI 9862 XNET Port Not Visible in NI MAX