Hello, Kilian. Please forgive my responding in English -- Google translated your request for me, and I hope it can translate my response, should you need it.
You realize, I hope, that the myRIO is a computer, running an Operating System (NI Real-Time Linux), and has a number of useful Data Acquisition peripherals, such as A/D converters and digital I/O ports. It is meant to work as the "Real-Time" component of a LabVIEW Real-Time Project, with a PC running the "Host" code that has the normal LabVIEW Front Panel, with Controls and Indicators that the "User" can use to control the program and visualize data, as well as spool data to the PC's disk, while the myRIO handles the "hardware" used to gather data and control acquisition peripherals.
The PC Host and myRIO Real-Time Target communicate over TCP/IP, either through the USB cable that plugs into the myRIO (the "B" end of the A/B USB cable) or through WiFi.
For sending one or two signals back and forth between the Host and Target, you could use Global Variables, shared between Host and Target, but that is slow and somewhat unreliable. You also have to think about how you want to synchronize the timing between the myRIO, which acquires the data, and the PC, which receives it from the myRIO some (unknown?) time later.
Many of us working with LabVIEW Real-Time systems use some form of TCP/IP (I use Network Streams, a LabVIEW communication protocol that works quite nicely to send commands and data back and forth between PC and myRIO).
Have you had experience using the simpler USB DAQmx data acquisition peripherals from NI that plug directly into the PC's USB port and can be directly addressed by LabVIEW, showing up on MAX in the "My Computer" section (instead of "Remote Systems", where the myRIO appears)? This would be much simpler to program. It is much simpler to manage a LabVIEW Project that has a single computer (the PC) with a few peripherals (USB DAQmx devices) than a LabVIEW Real-Time Project that has two computers (the PC and the myRIO) with Real-Time I/O on the myRIO and User Interaction, User Control, and User Visualization all on the PC.
Bob Schor
