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Display signal value during simulation

  • Library:
  • Simulink / Dashboard


The Display block connects to a signal in your model and displays its value during simulation. You can edit the parameters of the Display block while a simulation runs. Use the Display block with other Dashboard blocks to build an interactive dashboard of controls and indicators for your model.

Connecting Dashboard Blocks

Dashboard blocks do not use ports to connect to signals. To connect Dashboard blocks to signals in your model, 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. If you only want to connect a single Dashboard block, you can also use the Connection table in the block dialog box to make the connection.

To enter connect mode, click the Connect button that appears above your unconnected Dashboard block when you pause on it.

In connect mode, when you select one or more signals or blocks, a list of parameters and signals available for connection appears. Select a signal or parameter from the list to connect the selected Dashboard block. To connect another Dashboard block, pause on the block and click the Connect button above it. Then, make a selection of signals and blocks in your model, and choose a signal or parameter to connect.

When you finish connecting the Dashboard blocks in your model, click the Exit button in the upper-right of the canvas to exit connect mode.


  • Dashboard blocks can only connect to real scalar signals.

  • You cannot use the Connection table 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 signals inside referenced models.

  • Parameters specified by indexing a variable array do not appear in the Connection table. For example, a block parameter defined as engine(1) using the variable engine does not appear in the table.

    To access the parameter in the Connection table, assign the indexed value to a scalar variable, such as engine_1. Then, use the scalar variable to define the block parameter.


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Select the signal to connect using the Connection table. Populate the Connection table by selecting signals of interest in your model. Select the radio button next to the signal you want to display. Click Apply to connect the signal.

Format for displaying numerical values.

  • When you select long, the block displays numeric signal values using up to 15 digits with a fixed decimal point that displays up to four decimal places.

  • When you select long_e, the block displays numeric signal values in scientific notation using up to 16 digits with a floating decimal point.

Text alignment in Display block.

Position of the block label. When the block is connected to a signal, the label is the name of the connected signal.

Introduced in R2017b