This clause describes the configuration settings for the connection types defined in Clause 5.5.1 using PubSub as a communication model. For simplicity, all samples describe a single logical connection contained in the ConnectionConfigurationSet. Note, however, that as shown in E.1.3, a ConnectionConfigurationSet may contain multiple Connections, which may have different connection types.

The examples provide illustrations of how PubSub communication can be configured. The configuration contains various settings that have an influence on the communication model, including Address, PublishingInterval, QoS, MessageReceiveTimeout, ReceiveQos and SecurityMode (see 6.13.3 for additional details). Some of these settings can be complex to apply, such as the Address. Depending on the type of connection, this Address might contain a destination address, a receiving address, or a multicast address.

To set up the PubSubConfiguration for the bidirectional connection (illustrated in Figure E.1), information from multiple configuration elements is used, as illustrated in Figure E.10. For a simpler overview, configuration data not related to the communication model and the Endpoint2 are omitted.

Figure E.10 – Configuring PubSub

CommunicationModelConfig contains the PubSub configuration elements to be applied to the AutomationComponent. The ConnectionManager uses the configuration information in Flow1 and Sub1 to update the communication model. CommunicationLinks indicate which DataSetReader and DataSetWriter contained in the communication model are relevant for this ConnectionEndpoint. This information is also used to set up the ToDataSetReader and ToDataSetWriter References on Con_A.