This step is also demoed with this video :

(ongoing...)

Step 7f : insertUD

Remark : this option has also been introduced at step 2c.

In the options, default value for insertUD is 1 :

Modules may by connected one to the others through signals :

Depending sample time of the modules involved in the loop and Simulink preferences, it may occur a Simulink error as an Invalid function-call connection.

According to the Simulink documentation, the way to avoid this invalid connection is to break the loop by introducing a unit delay in it :

Invalid function-call connection may involve several modules :

But treatment is the same, break the loop by introducing a unit delay in it :

With insertUD option is set to 1, a unit delay is automatically inserted inside a loop when needed.

The step 2c : Invalid function-call connection illustrates this option through examples.

Published with MATLAB® R2013a