Hi Tommy, 
Data of an individual SimScape block can be logged programmatically by following the below mentioned steps: 
- In the Model Settings dialog box choose the ‘User Local Settings’ in Log Simulation Data as shown in the diagram below. 
 
            2. Then create a new MATLAB script and run the below code to set data logging option to true. 
modelName= 'NameOfSimScapeModel'; 
blockName = 'NameofBlock'; 
blockPath = getfullname([modelName '/' blockName]); 
model_handle = get_param(blockPath,'Handle'); 
set_param(model_handle, 'LogSimulationData', 'on'); 
            3. On running the above code, the preferred SimScape block will log output data 
Hope this helps!