This System Configuration implements the layered Model+View testing architecture for the Drilling example.

The MODEL Device encapsulates the functionality of both the Model and View layers. Its INPUT_VIEW and OUTPUT_VIEW Resources are configured identically to the INPUT and OUTPUT Devices, respectively, of the VIEW Resource in the DRILL_VIEWL System configuration.

Each of the major sections of the View (SUPPLY, etc.) is assigned its own Model Resource (SUPPLY_MDL, etc. - instances of EMB_RES). These Resources contain the appropriate Model elements (instances of the XBAR_MDLL, SOL_MDLL, and XSLIDE_MDLL types) and the logic for their interactions. Each of these elements communicates its state to the corresponding View element via the same local multicast channels as were used by the HMI in the DRILL_VIEWL configuration.

Each of the modeling Resources ( SUPPLY_MDL , etc.) in the MODEL Device is assigned its own pair of Resources ( SUPPLY_SENSORS, SUPPLY_ACTUATORS , etc.) in the HMI Device for the input of actuator values to and display of sensor values from the corresponding Model element. The same local multicast channels as are used for communication between the HMI elements and their corresponding Model elements in this configuration will be used for communication of sensor and actuator values between Model and Controller elements in the next step of the methodology.

This System Configuration uses the Local Multicast design pattern for the communication of data and events among Resources. The FBDK uses the Tagged Data design pattern to ensure consistency of the communicated events and data, as shown in the table below.

• Each tag name has a navigation link to a Resource configuration that makes use of the associated Local Multicast channel.
• There are other Local Multicast channels in this System configuration that do not appear in this table. These channels are created by component function blocks within Model and View function blocks. For instance, rendering data is carried from the MODEL.DRILL_MDL.DRILL FB to the MODEL.INPUT_VIEW.DRILL FB by a channel named DRILL_REND.