Dialog: System Configuration – Application

Create on Download

: A boot application is generated implicitly at download.

Store only on Download

: A boot application is generated implicitly at download, but the project is not downloaded to the memory. (For special applications only)

Behaviour on Retain Mismatch

Options for the behavior of the PLC in case of corrupt retain data:

Do not load: The boot application is not loaded.

Load with exception: The boot application is loaded, but not started. An exception is thrown.

Load and initialize retains: The boot application is loaded and initialized as after a download.

Invalidate bootapplications

Options regarding the invalidation of the boot application if the controller is not exited properly:

Never: The boot application is never invalidated.

By setting: The boot application is declared invalid in the configuration file of the PLC (*.cfg).

By rename: The *.app file of the boot application is renamed, which renders the boot application invalid.

Retain Type

Options for saving retain files on the CODESYS Control RTE:

None: The data is not saved, and the PLC cannot use any retain data.

SRAM: The PLC can use physical, nonvolatile memory for the retain data.

On powerfail: The retain data is saved to a file when the controller is shut down. For this purpose, the system must be equipped with a UPS. Then power failures are also covered.