Dynamically changing sample time for discrete time integrator

Hello, I am programming a dynamic chemical process which has a changing contact time (which changes the dt in the dC/dt equation). I have used a discrete time integrator with a sample time set to the contact time and this works just as I want it to however as I want the flow rate through the process to be variable and this will change the sample time I need to set. *I want to be able to set the sample time to value calculated else where in the model that changes. Does anyone have any advice for things I could try or know that this is impossible so I can stop trying?

Any extra details needed I will provide happily.

[Roger]

I have found a work around which is if the contact time is A then simply use a continous integrator with feed from equation that has dC/dt = A * x (where x is the original function). This gives me the desired answer I was looking for but I am a little wary of using this technique as I just made it up and am not sure of limitations / consequences. Any pearls of wisdom?

Answer 1

[Guy Rouleau]

Set the sample time of the discrete time integrator to be inherited and place it inside a triggered subsystem. You will need to make a logic to trigger the triggered subsystem at the right time.

[Roger]

Thank you Guy. The help of the community is massively appreciated.