How to change initial value of Simulink Integrator at each time step?

I have differential equation like this,

with initial value of 298, the T value starts increasing with time.

After T > 350, some cooling mechanism comes into act decreases the value of T to 350. So, every time T goes beyond the 350 value, T is pulled back down to T=350.

So, the problem is if I just set the value of 298, the value of T goes on increasing. I want additional change in T to be added on new initial condition of 350, not to the previous output.

for eg,

model is started with 298 initial condition

at t= 1, T =305,

at t=2, T=315,

.

.

.

at t=6, T = 355

Now here, a cooling mechanism will change the temperature to T= 350

so at t=7, T should be T= 350+ delT

but with default setting I am getting at t=7, T= T(at t=6) + delT;

Answer 1

[Fangjun Jiang]

double click the Integrator block to open the dialog, turn on "reset" and "initial condition" input port and work it out.