What is the difference between rtu and rtb varibles in auto code generation from simulink data?

In autocode geenration, the variables are vrated with prefix rtu and rtb ,what does it mean exactly?

Answer 1

[Jonas]

By default, local block output variables are appended with the prefix 'rtb_'. This setting can be changed in the Configuration Parameters > Code Generation > Identifiers.

External inputs are appended with the prefix 'rtu_', but I think it depends on the Storage Class as well.

[Dharaneedharan Arumugam]

Yes, check the same in the settings