Is it possible to run an s-function containing a hybrid model (continuous and discrete blocks) in a model with a lower time step size?

Is it possible to run an s-function containing a hybrid model (continuous and discrete blocks) in a model with a lower time step size?

The time step size of the s-function is a multiple of the time step size of the main model. I put rate transition blocks at all ports of the s-function, but the simulation won't run.

Is this a general problem or might there be some unlucky settings that keep the simulation from running?

Answer 1

[Don Zheng]

Can you provide an example model? It is unclear what you mean by "an S-function containing a hybrid model".

Answer 2

[Andreas Schmidt]

The model that was compiled to an s-function contains blocks with continuous and discrete sample time, which seems to be called "hybrid" by simulink. Unfortunately I cannot provide the model.

Does that make my question more clear?

[Don Zheng]

I was able to create an S-fcn from a subsystem containing a Constant block with 'Inf' time step (continuous) and a Constant block with '1' second time step (discrete). When running this S-fcn in a model with 0.1s fundamental sample time, things seem to work fine. Do you have an error message when running your model?