To ensure consistency between Simulink and System Composer, data ports are unidirectional with bidirectional communication being modeled by creating separate ports for inputs and outputs. We typically see customers adding an "_In" and "_Out," or equivalent, to the end of the port names. We have also heard feedback from customers that they prefer using unidirectional ports because it makes the model easier to understand at a high level.
We also have additional port types now, including physical ports which can be used to represent non-directional connections such as wires or pipes in a Simscape model, and client-server ports with service interfaces that can be used to represent call/response communication between components in a software architecture.
I hope that answers your question and gives you some additional methods for modeling data flow. If you need any more assistance, please reach out to us at:
Regards,
Josh
