OPC Alarms & Events (A&E) and OPC UA Alarms & Conditions (A&C) Support

OPC Alarms & Events Capabilities

• Receive/read data from multiple OPC A&E servers while acting as a client
• Aggregate alarms from multiple sources
• Serve alarm & event data as an OPC A&E server 
• Deliver alarm data to databases, Excel, HMI's and more 

The most common use of DataHub's OPC A&E feature is for secure tunneling of alarm data between OPC A&E clients and servers over networks. 

The DataHub tunneling protocol operates over TCP/IP on a single user defined port, provides encryption & authentication, is proxy & DMZ friendly, auto-reconnects on network failure and provides indicators of network status so you interpret the data properly. 

Don't transmit and move your critical alarm data over networks without the resilience of DataHub.

OPC Protocol Conversion

OPC A&E or OPC UA A&C data is often of value to applications other than the alarm client.  It is also common to be using an alarm client that uses one version of the OPC alarms protocol only, and you need to connect to an alarm source using the other OPC alarm protocol.

DataHub makes this easy because all datapoints are maintained in a single unified dataset.  When a change comes in via one protocol, such as OPC A&E, the point(s) in the data set update, and if OPC UA A&C clients are connected to that dataset, they will automatically receive the data.  DataHub operates the same way if connecting to an OPC UA A&C server and sending the data to an OPC A&E client. 

Remember once the data is in DataHub, you can also log it, send it to spreadsheets, send email notifications, publish to an MQTT broker, and more. 

User Case Study: Large Scale Secure Alarm & Real-Time Data Networking 

See how Trans-Anatolian pipeline leverages the multiple OPC standard integration, redundancy, scripting, and secure tunneling capabilities of DataHub across an 1,850 kilometer pipeline to securely network data. The application uses various communications mediums and is seamlessly integrated with an ABB control and management systems.

Learn More About the Trans-Anatolian Application

Alarm Collection Redundancy

It's common in critical systems to use redundant data paths to insure data communications. 

Combining DataHub's Redundancy capabilities with OPC A&E or UA A&C can deliver a robust result.

DataHub's Redundancy feature takes the incoming data from both OPC A&E servers into a DataHub instance acting as a Redundancy Broker. If one of the connections fails, the Datahub acting as the redundancy broker switches over so the client continues to receive data. Logic in the DataHub that you configure determines how and when a connection needs to failover to the backup and can do so very quickly.

DataHub OPC A&E, OPC UA A&C Feature Licensing

The DataHub OPC A&E and OPC UA A&C features can be added on to any DataHub Solution Pack or included in any custom solution pack. 

The DataHub OPC A&E or OPC UA A&C features are typically combined with these other features. Some common applications of this feature are covered on the rest of this page

• Networking & Tunneling
• Redundancy
• ODBC Logging
• OPC DA/UA Protocol Conversion
• MQTT to Cloud Brokers
• Aggregation