User`s guide

Signal Logging to the MATLAB Workspace
3-33
After you create a Simulink model and add a Scope block, you can enter the
signal and triggering properties for logging to the MATLAB workspace. This
procedure uses the Simulink model
rtwin_model.mdl as an example and
assumes you have already loaded that model:
1 In the Simulink window, and from the Tools menu, click External Mode
Control Panel
.
The
External Mode control Panel dialog box opens.
2 Click the Signal & Triggering button.
The
External Signal & Triggering dialog box opens.
3 Click the Select all button. From the Source list, choose manual. From the
Mode list, choose normal.
The
X under Signal selection designates that a signal has been tagged for
data collection, and
T designates that the signal has been tagged as a trigger
signal.
4 In the Duration box, enter the number of sample points in a data buffer. For
example, if you have a sample rate of 1000 samples/second and a stop time
of 10 seconds, you could enter
10000
The Duration value is related to the Limit data points to last value in the
Scope parameters dialog box. The smaller of either value limits the number
of sample points saved to the MATLAB workspace. We recommend that you
do not select the
Limit data points to last check box, and use the Duration
value to set the number of sample points saved.
To clear the
Limit data points to last check box, see “Entering Scope
Parameters” on page 3-30.