Resolving Rate Transitions
In general, a rate transition exists between two blocks if their
sample times differ, that is, if either of their sample-time vector
components are different. The exceptions are:
A constant sample time ([Inf, 0])
never has a rate transition with any other rate.
A continuous sample time (black) and the fastest discrete
rate (red) never has a rate transition if you use a fixed-step solver.
A variable sample time and fixed in minor step do
not have a rate transition.
You can resolve rate transitions by inserting rate transition
blocks and by using two diagnostic tools. For the single-tasking execution
mode, the Single task rate transition diagnostic
allows you to set the level of Simulink rate transition messages.
The Multitask rate transition diagnostic
serves the same function for multitasking execution mode. These execution
modes directly relate to the type of solver in use: Variable-step
solvers are always single-tasking; fixed-step solvers may be explicitly
set as single-tasking or multitasking.
For a detailed discussion on rate transitions, see Single-Tasking and Multitasking Execution Modes and Handling Rate Transitions.
 | Managing Sample Times in Systems | | How Propagation Affects Inherited Sample
Times |  |
Learn more about Simulink through this collection of videos, articles, technical literature and the Getting Started with Simulink Guide.
Get this Simulink Kit
Store 
