Sequence Viewer - Display messages, events, states, transitions, and functions between blocks
during simulation - Simulink ([original](https://in.mathworks.com/help/stateflow/ref/sequenceviewer.html)) ([raw](?raw))Display messages, events, states, transitions, and functions between blocks during simulation
Libraries:
Simulink / Messages & Events
Simulink Test
SimEvents
Stateflow
Description
The Sequence Viewer block displays messages, events, states, transitions, and functions between certain blocks during simulation. The blocks that you can display are called lifeline blocks and include:
- Subsystems
- Referenced models
- Blocks that contain messages, such as Stateflow® charts
- Blocks that call functions or generate events, such as Function Caller, Function-Call Generator, and MATLAB Function blocks
- Blocks that contain functions, such as Function-Call Subsystem and Simulink Function blocks
To see states, transitions, and events for lifeline blocks in a referenced model, you must have a Sequence Viewer block in the referenced model. Without aSequence Viewer block in the referenced model, you can see only messages and functions for lifeline blocks in the referenced model.
Note
The Sequence Viewer block does not display function calls generated by MATLAB Function blocks and S-functions.
Examples
Parameters
Number of digits for time increment precision. When using a variable step solver, change this parameter to adjust the time precision for the sequence viewer. By default the block supports 3 digits of precision.
Suppose the block displays two events that occur at times0.1215 and 0.1219. Displaying these two events precisely requires 4 digits of precision. If the precision is 3, then the block displays two events at time 0.121.
Programmatic Use
| Block Parameter:VariableStepTimePrecision |
|---|
| Type: string scalar or character vector |
| Values: "3" | scalar |
| Default:"3" |
Total number of events before the last event to display.
For example, if History is 5 and there are 10 events in your simulation, then the block displays 6 events, including the last event and the five events prior the last event. Earlier events are not displayed. The time ruler is greyed to indicate the time between the beginning of the simulation and the time of the first displayed event.
Each send, receive, drop, or function call event is counted as one event, even if they occur at the same simulation time.
Programmatic Use
| Block Parameter:History |
|---|
| Type: string scalar or character vector |
| Values:"1000" | scalar |
| Default:"1000" |
Block Characteristics
| Data Types | Boolean | bus | double | enumerated | fixed point | integer | single |
|---|---|---|---|---|---|---|
| Direct Feedthrough | no | |||||
| Multidimensional Signals | yes | |||||
| Variable-Size Signals | no | |||||
| Zero-Crossing Detection | no |
Extended Capabilities
This block can be used for visualizing message transitions during simulation, but is not included in the generated code.
Version History
Introduced in R2015b