Configure a redundant OPC UA connection

As of Communications Driver Pack 2023, you can configure the Redundant Device Object in Gateway Communication Driver to leverage the Service Level exposed by the OPC UA Server.

Based on the OPC UA standard, an OPC UA server can provide a Service Level indicating its quality of service. The Service Level is divided into 4 tiers:

• 0 - Maintenance

• 1 - No Data

• 2 - 199 Degraded

• 200 - 255 Healthy

While the Gateway Communication Driver can fail over between primary and secondary connections when the configured ping item returns a bad quality, you can also check the box Primary and secondary devices support OPCUA redundancy. When the Service Level of active OPC UA server drops below the Healthy tier (value below 200), Gateway Communication Driver will fail over the active connection to the standby connection.

For more information refer to Configure device redundancy topic under AVEVA™ Communication Drivers Pack Help.