Signal Logging Basics

Signal logging acquires signal data during a real-time run and stores it on the target computer. After you stop the real-time application, you transfer the data from target computer to development computer for analysis. Signal logging is also known as real-time data streaming to the target computer. You can plot and analyze the data, and later save it to a disk on the development computer.

Simulink® Real-Time™ signal logging samples at the base sample time. If you have a model with multiple sample rates, add Simulink Real-Time scopes to the model to sample signals at the required sample rates.

  • The Simulink Real-Time software does not support logging data with decimation.

  • Simulink Real-Time Explorer works with multidimensional signals in column-major format.

  • Some signals are not observable. See Nonobservable Signals and Parameters.

You can log signals using the following methods:

  • File scopes and outports in the model

  • Virtual file scopes in Simulink Real-Time Explorer

  • MATLAB® language

  • A web browser

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