RTW creates software tasks for each rate in the model, and Simulink can colour each block in the model based on the rate of the block. This can make it easier to understand what parts of the model run at which rate, and to understand how information is passed between rates.

To support switching between auto-coders, the blockset library provides a set of blocks which switch between the different configuration sets. Simulink configuration sets contain options for a specific auto-coder. Currently, building models against the RTW (GRT RTMODEL) and RTW (EC) auto-coders is supported.

The blockset provides a utility block to start a model build. Pressing CTRL+B in a model window performs the same functionality.