Signal tracing acquires signal and time data from a real-time application. While the real-time application is running, you can visualize the data on the target computer by using the Simulation Data Inspector. You can upload the data from a File Log block to the development computer and display it using the Simulation Data Inspector.
You trace signals by marking the signals for logging or connecting the signals to File Log blocks. View the signals by using Simulink® Real-Time™ Explorer, Simulink external mode, and the Simulation Data Inspector. For more information, see Simulation Data Inspector and How Application is Run Affects Signals Logged.