Outport used in Real-Time Multicore Systems

Hi I’m using a "concurrent Execution on xPC Target" to speed up a real-time-simulation using a multicore processor. The model works nicely, but i have problems with any kind of data logging. When using an Outport in the base-model, I get the message:

"This model is configured for concurrent execution and has modeling constraints. The signal at root Outport block 'xyzModel/Out1' must resolve to an exported storage class. "

Frankly I have no clue how to resolve this.

I tried other ways of data logging: Scopes (in sub-models) seem not to work and Signal-logging leads to compiling errors.

Thanks, Jan

Answer 1

[Shiva Arun Kumar]

Hi Jan,

As you have mentioned in your post the following options do not work for a model that configured for concurrent execution:

a) Using outport logging at the top level b) Using xPC scope blocks within sub-models

However, one you can definitely use xPC scopes once the application (model) has been built and downloaded on to the target. For example,

Step 1: Build and download you model to the target.

Step 2: Determine the ID of the signal you would like to log. You can execute the following commands to obtain a complete list of signals in your application and their respective ids

tg=xpc tg.showsignals='on'

If you would like to obtain the id of a specific signal, you can utilize the getsignalid command

http://www.mathworks.com/help/toolbox/xpc/ref/getsignalid.html

Step 3: Add file scope to your model and add the signal to the scope.

sc=tg.addscope('File'); sc.addsignal(<signalid>); sc.Filename='<filename>.dat'; sc.NumSamples=5000;

Step 4: Start the scope and start the application. +sc; +tg;

The following link has more information on xPC Target Scopes:

http://www.mathworks.com/help/toolbox/xpc/io_ref/scopexpc.html

Hope that helps.

Shiva

Answer 2

[Guy Rouleau]

I am not sure what is the best way to log data in an model configured for concurrent execution. I would recommend contacting technical support if you cannot find relevant info in the documentation.

The following documentation page about data representation of signals will explain you what is a storage class and how to make it exported:

http://www.mathworks.com/help/toolbox/rtw/ug/f1070804.html