Buses and Libraries

When you define a library block, the block can input, process, and output buses just as an ordinary subsystem can. MathWorks recommends not using Bus Selector blocks in library blocks, because such use complicates changing the library blocks and increases the likelihood of errors. When a Bus Selector block appears in a library block, the following considerations and recommendations apply:

• You cannot change a Bus Selector block directly within a library. To change the Bus Selector block, copy the library block that uses it to a model, edit the Bus Selector block within the context of the model, then copy the changed library block back to the library.

• The Inport that feeds the Bus Selector block should have an associated bus object, as described in Using Bus Objects. This bus object must be stored in a MATLAB code file or MAT-file, and imported into the base workspace of any model that subsequently uses the library block.

• Any model that uses the library block containing the Bus Selector should set Configuration Parameters > Connectivity > Element name mismatch to error. This setting minimizes the possibility of consistency errors at the interface to the library block.

See Working with Block Libraries for information about creating block libraries and copying library blocks to and from them.

Combining Buses into an Array of Buses

Avoiding Mux/Bus Mixtures

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