Documentation

Frequency Measurement

This model shows how to measure input signal frequency using Simulink Desktop Real-Time™. The measured signal is connected to the counter input of your data acquisition board. Counter Input block is configured to reset counter each sample-hit after counter read. Dividing counter value by sample time gives input signal frequency.

How to run this model in Normal Mode:

  1. Open the Counter Input block and select your data acquisition board. If there's no board installed, install it using the Install new board button.

  2. Double-click the orange button to switch to Normal Mode if needed.

  3. Start the real-time execution using Simulation->Run.

How to run this model in External Mode:

  1. Open the Counter Input block and select your data acquisition board. If there's no board installed, install it using the Install new board button.

  2. Double-click the orange button to switch to External Mode if needed.

  3. Start the real-time execution using Simulation->Run. The model will automatically build, connect to Simulink in External Mode and start.

Note: To run this model, you must have a data acquisition board with counter input connected to your computer.

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