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What is new in FMI 3.0 The FMI Design Community has improved the FMI standard to react to new requirements from the system simulation community. Especially the ability to package control code into FMUs required some workarounds in FMI 2.0. With FMI 3.0, virtual electronic control units (vECUs) can be exported as FMU in a more natural way. Concrete features to support vECU export are: introduction of terminals to group variables semantically to ease connecting compatible signals, introduction of icons to define a graphical representation of the FMU and its terminals, introduction of Clocks to more exactly control timing of events and evaluation of model partitions across FMUs, introduction of more integer types and a 32-bit float type (see Section 2.4) to communicate native controller types to the outside, introduction of a binary type to support non-numeric data handling, such as complex sensor data interfaces, extension of variables to arrays for more efficient and natural handling of non-scalar variables, introduction of structural parameters that allow description and changing of array sizes, even during runtime to support advanced online calibration of control code, and addition of the new interface type "Scheduled Execution" (see Section 5) that allows activation of individual model partitions (or tasks) by an external scheduler, e.g. on real-time platforms.

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