You can get the handles to all the blocks of a particular type using 'Simulink.findBlocksOfType('<model_name>', '<type_of_block>')'. Once you have them, obtain the port handles to each of the blocks using 'get_param(blockHandle, 'PortHandles')' and set the 'DataLogging' parameter to 'on' through 'set_param(portHandle.Outport(1), 'DataLogging', 'on')'.
Use the following script to do this:
targetBlocks = Simulink.findBlocksOfType('<name_of_model>', 'Gain');
for i = 1: size(targetBlocks, 1)
blockPH = get_param(targetBlocks(i), 'PortHandles');
set_param(blockPH.Outport(1),'DataLogging','on');
end
This needs to be done at the beginning of the simulation. So it is a good idea to include this as a part of the model callback fucntion, InitFcn. This can be accessed from: Model Configuration Parameters / Model Properties / Callbacks/ InitFcn.
After running the model, the output signal data will show up in the workspace as a 'Dataset' variable named 'logsout'. This variable will contain the output signals of all the required blocks.
Relevant links:
- https://www.mathworks.com/help/simulink/slref/simulink.findblocksoftype.html // To find a particular type of block.
- https://www.mathworks.com/help/simulink/slref/get_param.html //Obtain parameters of a block / subsystem given its handle.
- https://www.mathworks.com/help/simulink/ug/configuring-a-signal-for-signal-logging.html#bsw9vzy // Configure signal for logging.
