How to run a simulink simulation from an m-file, and get data from simulation before the m-file is terminated? And then update the model, and start all over again.

I'm attempting to tune a DC motor using a PID controller and Simulink. My goal is to use the Ziegler-Nichols method, which is an iterative method.

I would like to be able to run my simulation, get some data, do some computations, update my model and then start all over again - without actually having to update my model after every iteration. Until the results I desire are achieved.

The problem I am having is Simulink does not update the workspace until my script as completely terminated. So I can't do any computations with my workspace data from my script.

I've been researching different solutions over the past couple of days, but I have had no success. Any help would be much appreciated!