For information about creating a Flow Port on an Internal Block Diagram, click here
To create a flow port:
1. In an appropriate pane, right-click the Block or Interface Block that is to own the Flow Port, point to New, point to SysML, and then click Flow Port.
2. To use an existing item as a type:
a. In the Options group, click the Existing Type option.
b. Select the item that you want to use as a type, and then click OK.
Note that, in the Existing Type: pane, you can click the Find Items button to open the Add New Search Folder dialog where you can specify the Type and a subset or the full Name of the items that you want to find.
To create a new item to use as a type:
a. In the Options group, click the NewType option.
b. From the Type list, select the type of the item you want to create and use as a type.
c. In the Name box, type the name of the item that will be used as a type, and then click OK.
To create an untyped Flow Port:
In the Options group, click the Untyped option, and then click OK
3. In the dialog, set the direction to inout,in or out as required, and then click OK.
4. Type the name of the Flow Port, and then press the Enter key.
After creating a Flow Port, you can specify its multiplicity and specify whether the Flow Port is conjugated, read only and a behavior port. For more information see the Related Topics.