I understand that you want to automate the testing of your subsystems by using the ‘test sequence’ block to switch between the subsystems dynamically in a single test harness. However, to the best of my knowledge, such dynamic switching of subsystems based on a signal or parameter output is not supported in Simulink as it works with workspace variables which are modified only after the simulation ends.
As a workaround, you can try using logic and conditional blocks with the output signal of the ‘test sequence’ to activate the desired subsystems based on the state/step changes in any scenario of the ‘test sequence’ block. Although this would not be a ‘variant subsystem’ test harness but would be sufficient to test the working of all the subsystems automatically.
Please refer the following documentation for more information on ‘Variant Control Switch’ -
Hope this helps.
