5 Use cases (informative)

5.1 Use cases for different types of communication links

5.1.2 Bidirectional communication

Bidirectional communication means exchange of data in both directions, which is accomplished by placing a SafetyProvider and a SafetyConsumer on each controller. Hence, bidirectional communication is realized using two OPC UA Safety connections.

Figure 4 – Bidirectional Communication

Note: Connections can be established and terminated during runtime.