Monitor Signals with MATLAB Language

This procedure uses the model ex_slrt_rt_osc (open_system(docpath(fullfile(docroot, 'toolbox', 'xpc', 'examples', 'ex_slrt_rt_osc')))). You must have already completed the setup in Prepare Real-Time Application by Using MATLAB Language.

Note

• Signal access by signal index will be removed in a future release. Access signals by signal name instead.

• The Simulink^® Real-Time™ software lists referenced model signals with their full block path. For example, ex_slrt_rt_osc/childmodel/gain.

1. To get a list of signals, type:

   tg.ShowSignals = 'on'

   Target: TargetPC1
      Connected            = Yes
      Application          = xpcosc
   .
   .
   .
      Scopes               = 1
      NumSignals           = 7
      ShowSignals          = on
      Signals              = 
         INDEX  VALUE     Type    BLOCK NAME      LABEL
         0      0.000000  DOUBLE  Gain            
         1      0.000000  DOUBLE  Gain1           
         2      0.000000  DOUBLE  Gain2           
         3      0.000000  DOUBLE  Integrator      
         4      0.000000  DOUBLE  Integrator1     
         5      0.000000  DOUBLE  Signal Generator
         6      0.000000  DOUBLE  Sum             
   .
   .
   .

   If your signal has a unique label, its label is displayed in the Label column. If the label is not unique, the command returns an error.

2. To get the value of a signal, use the getsignal method. In the Command Window, type:

   getsignal(tg,'Integrator1')

   ans =
   
      -3.8771

Related Topics

• Configure Target Scopes with MATLAB Language
• Troubleshoot Signals Not Accessible by Name