Hello @srikar_26
For a variable to be seen in the FreeMaster directly with his name, it has to be declared a Signal Object Class as "Exported Global" or "Volatile" if you use it in an interrupt as well. Otherwise, Simulink will declare the variable inside a structure starting with the model's name.
For that, depending on the Simulink version, you have to the to the Model Data Editor and select the Storage Class.
mariuslucianand_0-1630402670000.png
Hope this helps,
Marius