CODESYS Multiple Applications - Article no. 000013

Multiple Applications

With CODESYS it is possible to run multiple applications on one target device.
This example shows how to create child applications and how to run multiple applications on one control.

More information

The project Multiple Application contains two main applications: MainApplication1 and MainApplication2.
As an example, a simple 2-point-regulator with a corresponding visualization is used.
The visualization and the data structure are stored in the POU pool. The communication between the applications is done over the global variable list of the main application.
The IO mapping must always be defined in the main application.

Example 'MainApplication1':

The main application contains the visualization of two regulators. The logic of the regulators is outsourced
in ChildApplication1 and ChildApplication2. Both applications can be started independently.
This architecture is useful, if a controller process must run independently from other processes.

Example 'MainApplication2':

In this example, the main application contains the regulator logic. The visualization is outsourced in a
child application (VisuApplication). This architecture is useful, if a controller process must run
independently from the visualization.