Simulink not respecting the sampling time

I have a Simulink model that have to acquire data from a device every 20 ms and then run this data through a neural network. I used a function call generator to call the acquisition every 20 ms but Simulink seem to not respect that timing.

What to do ?

[Birdman]

How do you know that Simulink does not respect the sampling time? What do you observe?

[Oussama Djedidi]

The sampling time is around 0.5 second most of the time. It is like a simulation and a real-time execution.

Answer 1

[Mark McBroom]

Do you have Simulink connected directly to the device? Simulink is not a real-time program. It will run the simulation as fast as it can. If your model runs faster than real-time, you can slow it down to pseudo-real time by using the Simulation -> Pacing Options.