The EstablishConnections implementation shall enable the DataSetReader and DataSetWriter referenced by ToDataSetReader and/or ToDataSetWriter References for each element in ConnectionEndpointConfigurations. It shall also ensure that the parent Objects (WriterGroup, ReaderGroup, PubSubConnection, and PublishSubscribe) are enabled.

If enabling any communication model-specific Objects fails, the EstablishConnections implementation shall abort processing as described in 6.2.4.3.11.

If enabling a ConnectionEndpoint would lead to multiple DataSetReaders being enabled that reference the same TargetVariable(s), the EstablishConnections implementation shall abort processing as described in 6.2.4.3.11.

The possible StatusCodes for the FunctionalEntityNodeResult are formally defined in Table 11. The possible StatusCodes for the ConnectionEndpointResult are formally defined in Table 12. The possible StatusCodes for the EnableCommunicationResult are formally defined in Table 17.