PXIe 8840 running LVRT communication with Windows PC.

[RonnieLindley]

What is the easiest and fastest way to communicate 80 Hz data (about 80 bytes) from a Windows 7 computer to the embedded controller.

[Tepig]

The data is lossy or lossless?

Data Communication Methods in LabVIEW

If lossy, you should use "Variable Interfaces" method. I think "Shared Variable" is the easiest.

If lossless, you should use "Buffer Interfaces" method. I think "STM" and "Network Stream" is good.