In order to have read/write access to the remote devices and their running applications, you can add a data source manager to your application with one or more data sources.

The functionality of the data source manager allows for establishing connections and communication to remote devices, and it makes its data available through data source variables. At this time, the partners communicate by means of a point-to-point connection. Depending on the network where the controllers are located, a connection is established by means of the CODESYS Symbolic or CODESYS ApplicationV3 data source types.