How can I include an Enable/Trigger block at the root level of a Simulink model?

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Bentley - 2020-09-23T09:25:34+00:00
Question: How can I include an Enable/Trigger block at the root level of a Simulink model?

I would like to include an Enable block at the root level of my Simulink model. This returns the following error message: Trigger, enable and action ports are not allowed in the root window of a block diagram. I would also like to be able specify port attributes in these blocks.

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    • Expert Answer

    Profile picture of Neeta Dsouza Neeta Dsouza answered . 2025-11-20

    This enhancement has been incorporated in Simulink (R2011b). For previous product releases, read below for any possible workarounds:
    The ability to include Enable/Trigger/Action ports in the root level of a model is not available in Simulink.
    To work around this issue, you may use the Model Reference block in an enabled or triggered subsystem.


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