If necessary, create an Interface Block either on the same diagram or on a convenient reference data diagram, again using the ' SysML Block Definition' pages of the Diagram toolbox. Do this for as many Block elements and/or Ports as are required.
MODELIO SYSML PORTS FULL
In necessary, on a Block Definition diagram create the Port, Full Port or Proxy Port element on a Block element, using the ' SysML Block Definition' pages of the Diagram toolbox. If the Block element has an Internal Block diagram or Parametric diagram, the direction arrows on the Port are automatically shown in that diagram. On our diagram, this is illustrated by the Control Data, Word and Byte elements that are used to define the 'control' FlowProperty the definition of each of the other FlowProperties in the diagram would be drawn from a similar arrangement of Value Type elements.
MODELIO SYSML PORTS SERIES
The item identified by a FlowProperty is defined through a series of Value Type elements and Unit and Quantity Type objects that are ultimately derived from your SysML Model Library (see the Creating Model Library Definitions Help topic). You can have a single Flow Property for a discrete object that is passed through the Port, such as 'electric current', or a number of Flow Properties to identify the components of a package of items, such as data items, as shown in the diagram. On the example diagram, this is shown in front of 'Camera Interface' under the 'Station I/O' Port name, indicating that the Port references the Flow Properties of Camera Interface but with the inverse direction values.Įach FlowProperty identifies something that is passed into or out of an element. When this is done, on the diagram a tilde (~) is displayed against the Port's reference to the Interface Block name.
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You do this by selecting that Port's 'Conjugated' property. Both Ports would reference the same Interface Block and Flow Properties, but the flow through one would have to be set to the inverse of the defined direction(s). That is, the items flow out from one Port and in to another. Ports that exchange the Flow Property items are usually in reciprocal pairs. For example, in the diagram, some Flow Properties have the direction 'in' and some 'out', so the Port displays both 'in' and 'out' arrows. (The direction is set in the 'direction' Tagged Value of each Flow Property element.) Where one Port references several Flow Properties, the direction arrows reflect all of the direction values used in the properties. The direction of flow is defined by one or more Flow Property elements contained in an Interface Block element that 'types' the Port. In SysML Block Definition diagrams you can represent the direction of flow through Ports, Full Ports and Proxy Ports by generating direction arrows on the Ports, as illustrated by the 'Camera I/O' and 'Station I/O' Ports in this Block diagram.
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