In industrial automation, data loss and downtime can have serious consequences. OPC redundancy is a powerful way to keep your data flowing, even when a primary server fails. But how does it work—especially when your plant might have a mix of older OPC DA servers and newer OPC UA systems?
Let’s examine how OPC redundancy ensures data reliability across legacy and modern OPC servers without forcing you to tear down and replace your existing infrastructure.
Why Redundancy Matters
Redundancy isn’t just a buzzword. It’s about keeping critical data flowing—even during network hiccups, server failures, or maintenance windows. With OPC Redundancy, you can connect to legacy and modern OPC UA DA servers, ensuring your investments remain valuable.
How OPC Redundancy Works
OPC redundancy connects to two different OPC servers—often a Primary and a Standby—and monitors them 24/7. If the Primary server fails or stops responding, OPC Expert automatically switches to the Standby server. You can choose from Hot, Warm, or Cold redundancy based on your risk tolerance and process criticality.
- Hot Redundancy: Data is mirrored on both servers, ensuring seamless failover.
- Warm Redundancy: Data comes from the Primary, but the Standby is on Standby (pun intended!) and takes over if needed.
- Cold Redundancy: The Standby server is dormant until manually activated.
Visual Configuration Made Easy
Setting up redundancy in OPC Expert doesn’t require writing scripts or manual configuration. With a simple drag-and-drop interface, you can define redundancy objects visually. Just drag the Primary server and drop it onto the Standby server—it’s that easy. This game-changer is for maintenance techs and engineers who don’t want to mess with complex XML files.
Automated and Custom Triggers
OPC redundancy includes automated triggers that detect a lost connection and failover immediately—no human intervention is needed. However, it also allows for custom triggers, like when a value goes stale, exceeds a limit, or requires a manual failover.
Bridging Old and New
A key benefit of OPC redundancy is its broad compatibility. OPC Expert can manage both whether your plant has older or newer OPC UA DA servers. This means you can modernize at your own pace while ensuring critical data remains available.
Real-World Benefits
Data Loss Prevention: No more gaps in your process historians.
System Uptime: Keep your HMI screens live during server maintenance.
Simplified Maintenance: Visual configuration beats long configuration files every time.
Flexible Triggers: Automated or custom—tailor failover to your process.
Final Thoughts
You don’t have to rip and replace your system to get reliable redundancy. With OPC Expert’s redundancy feature, you can bridge the gap between legacy and modern OPC servers. The result? Seamless data flow, minimal downtime, and a network always ready for the next challenge.