Example: Decoupled Modules

The example describes a building which contains rooms. These rooms have switches and lights, each of which is available in two variants. The lights (blinking or steady) can be linked to switches or -buttons. A switch or-button can be linked to several lights. For example, if a light is equipped with both a switch and buttons, then the switch behaves as a main switch which must be pressed before the lights can be operated with the push-buttons. If only switches are installed, then these switch the referencing light. A blinking light automatically switches between on and off when it is switched on.

In the example, the decoupled module describes a shed which is applied both as part of the house and as a top-level module. The application of the shed can be executed on a separate controller, regardless of its use.

For more information, see: Decoupled section and Proxies section.

To generate this example, the Standard generator option must be selected.

In order to communicate with the different controllers, the application target of the shed must be set accordingly in the instances of the shed.

Three interconnected controllers are required for executing this sample application. For example, the CODESYS Control Win (SoftPLC) product can be used as a second and third controller on a configured virtual machine. If the decoupled module is applied as a submodule but it runs on a separate controller, then the communication takes place via the list of network variables and proxy instances.