This System Configuration implements the layered Model+View+Control testing architecture for the pallet handling example.The screenshot above shows the result of performing the following actions:

1. Launching the configuration.
2. Clicking the RESET button to initialize the system.
3. Clicking the LOAD button to load a pallet onto the FEED conveyor.
4. Clicking the RUN button.
5. Allowing the system to run through Steps 1-5 shown in the animation.
6. Snapping the screenshot as the lifter is moving down, as shown in Step 6 of the animation.

As shown in the figures below, this System configuration is derived from the LIFTER_MVL configuration as follows:

• Controller functionality is added to the MODEL Device in a new CTL Resource, which contains an instance of the LIFTER_CTL FB Type to perform the required control functions.
• The LIFT_ACTUATORS and FEED_ACTUATORS Resources of the HMI Device are re-configured to display the actuator values output by the controller.
• The configurations of the remaining Resources in the HMI and MODEL Devices remain identical to their configurations in the LIFTER_MVL System configuration.
• Finally, the use of the local multicast and Tagged Data design patterns enables the insertion of the CTL Resource into the MODEL Device without any modification of the Tag data base.