Switch parameter to set values on dial
Simulink / Dashboard
The Rotary Switch changes the value of the connected block parameter to several specified values during simulation. For example, you can connect the Rotary Switch block to the amplitude or frequency of an input signal in your model and change its characteristics during simulation. Use the Rotary Switch block with other Dashboard blocks to create an interactive dashboard to control your model.
Double-clicking the Rotary Switch block does not open its dialog box during simulation and when the block is selected. To edit the block's parameters, you can use the Property Inspector, or you can right-click the block and select Block Parameters from the context menu.
Connect Dashboard Blocks
Dashboard blocks do not use ports to connect to model elements. To connect dashboard blocks to variables and block parameters, use connect mode. Connect mode facilitates the process of connecting dashboard blocks in your model, especially when you want to connect multiple blocks at once. To connect a single dashboard block, you can also use the Connection table in the block dialog box.
You can modify dashboard block connections in your model during normal and accelerator mode simulations.
Dashboard blocks cannot connect to variables until you update the model diagram. To connect dashboard blocks to variables or modify variable values between opening your model and running a simulation, update the model diagram using Ctrl+D.
To enter connect mode, in the canvas, select the dashboard block to connect. On the Simulink® Toolstrip, a tab named after the type of the selected block appears. On the block tab, click Connect. In connect mode, when you select one or more blocks, a list of parameters and variables available for connection appears. Select a variable or parameter from the list to connect to the selected dashboard block.
When the value of the selected variable or block parameter is nonscalar, use the text box
at the bottom of the Connection table to specify the element you want
to connect to the dashboard block. To connect to an element of a vector, matrix, or array,
specify the element index, for example,
connect to an element in a bus or structure, specify the element in the context of the bus
or structure hierarchy by using dots to indicate different levels in the hierarchy, and omit
the top level. For example, specify
a.b to connect to scalar element
b of the structure or bus
a nested inside the
selected composite variable or parameter.
To connect another dashboard block, pause on another dashboard block and click the Connect button above it. Then, make a selection of signals and blocks in your model and choose a model element to connect.
When you finish connecting the dashboard blocks in your model, on the block tab, click Done Connecting.
You can hide the message shown on unconnected blocks using the
set_param function with the
block parameter. The message also disappears when you connect the block.
Tunable parameters connected to dashboard blocks are logged to the Simulation Data
Inspector, where you can view the parameter values along with logged signal data. You can
access logged parameter data in the MATLAB® workspace by exporting the parameter data from the Simulation Data Inspector
by using the UI or the
Simulink.sdi.exportRun function. For more information about exporting
data using the Simulation Data Inspector UI, see Export Data to the Workspace or a File. The
parameter data is stored in a
Simulink.SimulationData.Parameter object, accessible as an element in the
Except for the Dashboard Scope block and the Display block, dashboard blocks can only connect to real scalar signals.
The toolstrip does not support blocks that are inside a panel.
You cannot use the Connection table in the block dialog to connect a dashboard block to a block that is commented out. When you connect a dashboard block to a commented block using connect mode, the dashboard block does not display the connected value until the you uncomment the block.
Dashboard blocks cannot connect to model elements inside referenced models.
When you simulate a model hierarchy, dashboard blocks inside referenced models do not update.
Dashboard blocks do not support rapid accelerator simulation.
When you connect a dashboard block to a variable or parameter during simulation, the data for that variable or parameter is not logged to the Simulation Data Inspector. To log variable and parameter data to the Simulation Data Inspector, connect the dashboard block to the variable or parameter prior to simulation.
When you simulate a model in external mode with the Default parameter behavior set to Inlined, dashboard blocks can appear to change parameter and variable values. However, the change does not propagate to the simulation. For example, Gain blocks display changes made to the Gain parameter using the dashboard blocks, but the Gain value used in the simulation does not change.
Connection — Select a variable or block parameter to connect
variable and parameter connection options
Select the variable or block parameter to control using the Connection table. To connect the block to a signal:
Make a selection in the model that includes one or more blocks.
Select the variable or parameter you want to connect.
When the value of the selected variable or block parameter is nonscalar, use the text box at the bottom of the Connection table to specify the element you want to connect to the dashboard block. To connect to an element of a vector, matrix, or array, specify the element index, for example,
(1,3). To connect to an element in a bus or structure, specify the element in the context of the bus or structure hierarchy by using dots to indicate different levels in the hierarchy, and omit the top level. For example, specify
a.bto connect to scalar element
bof the structure or bus
anested inside the selected composite variable or parameter.
To facilitate understanding and debugging your model, you can connect Dashboard blocks to variables and parameters in your model during simulation.
To see workspace variables in the connection table, update the model diagram using Ctrl+D.
To programmatically connect a dashboard block to a tunable parameter or a
variable, use a
Simulink.HMI.ParamSourceInfo object. The
Simulink.HMI.ParamSourceInfo object contains four
properties. Some of the properties apply to connecting dashboard blocks to
parameters, and some apply to connecting dashboard blocks to variables. Not all
fields have a value for a connection because a given dashboard block connects to
either a parameter or a variable.
States — Position labels and values
scalar and character vector
Pairs of numeric values to assign to the connected variable or parameter with labels for the block. A State consists of a State Value and a State Label.
State Value — Value assigned to the connected variable or parameter when the Rotary Switch block is positioned at the corresponding State Label.
State Label — Label for the switch position. You can use the State Label to display the value the connected variable or parameter takes when the Rotary Switch block points to the State Label, or you can use a descriptive text label.
Click the + button to add States.
The default configuration for the block includes these States:
|State Value||State Label|
To configure the States for the block
programmatically, specify the value of the
parameter as a structure array with fields:
Value— Scalar double value for the state.
Label— String or character array to use as the label for the switch position.
Include a structure element in the array for each state you want to specify for the block.
state1.Value = 1; state1.Label = 'State 1'; state2.Value = 2; state2.Label = 'State 2'; states = [state1 state2];
|Type: structure array|
Enumerated Data Type — Specify state values and labels using an enumerated data type
off (default) |
You can use an enumerated data type that pairs a numeric value with each enumeration to configure the state values and labels for the block. To specify the states for the block using an enumerated data type, first select the Enumerated Data Type option. Then, specify the name of the enumerated data type in the text box. The definition for the specified enumerated data type must be saved on the MATLAB path or in the base workspace.
To programmatically specify the state labels and values for the block using an enumerated data type, specify
'on' for the
UseEnumeratedDataType parameter and the name of the enumerated data type for the
|Block Parameter: |
|Type: string or character array|
|Block Parameter: |
|Type: string or character array|
Label — Block label position
Top (default) |
Position of the block label. When the block is connected to an element in the model, the label is the name of the connected element.
|Type: character vector|
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
Dashboard blocks are ignored for code generation.
Version HistoryIntroduced in R2015a
R2021a: Tune matrix and structure elements using dashboard blocks
Starting in R2021a, you can connect a block from the Dashboard library to a scalar element of a matrix or structure that defines the value of a tunable block parameter. When you connect a dashboard block to a tunable parameter, you first select one or more blocks. Then, in a dialog box, you select the parameter to which you want to connect. When you select a parameter that has a nonscalar value, specify the element you want to tune using the text box in the dialog box.
R2020b: Simulink Toolstrip support for dashboard blocks
Starting in R2020b, the Block tab in the Simulink Toolstrip turns into a block-specific tab when you select a block in your model that is from the Dashboard library in the Simulink library or from the Flight Instruments library in the Aerospace Blockset™ Flight Control Analysis library. From the toolstrip, you can connect, disconnect, and modify connections for the selected block. You can jump to the model element connected to the selected block, and you can add the selected block to a panel.
R2019b: Enhanced enumerated data type support for the Rotary Switch block and Combo Box block
Starting in R2019b, you can use an enumeration class to configure the values and labels for the states of a Rotary Switch block and a Combo Box block.
To configure the States for a Rotary Switch or Combo Box block with an enumerated data type, select Enumerated Data Type. In the text box, enter the name of the enumeration class you want to use.
When you use an enumeration class to configure the states of the block, you cannot manually edit, add, or remove states from the States table.
R2019a: Programmatically add and configure dashboard blocks
Starting in R2019a, you can use functions such as
set_param to create and configure blocks from the Dashboard
library in your model.