The OPC Web Service allows you to Read and Write to your OPC Tags:
- Read or Write 1..x Tags in a single call.
- Read or Write to Tags in 1...x OPC Servers in a single call.
- Read or Write 1..x Tags from 1..x OPC Servers, in a single call.
Standards based - Developed to adhere to all Web Service standards, you can rest assured knowing that your OPC systems can be accessed by any application capable of consuming Web Services - the true definition of an open system, this of course, can be secured to restrict access to particular users, groups, subnets and IP addresses etc.
Highly Optimized! - Unlike other components available, the OPC Web Service actually interacts with a background engine that is able to maintain state. How does this benefit you? When you read some tags, the background engine can be configured to automatically poll those tags and cache them so that the next time you request those tags their values are immediately available to you from cache, this results in a massive speed improvement over other components that must initialize their connection to the OPC Server, add their group, add items to the group, do the read, and then tear everything down.
Take your data with you! Because Web Services use HTTP over Port 80 making your data accessible over the internet and through firewalls. You do not have to open Firewall ports to expose your OPC Data.
Developers, interested in developing Web-pages that are able to dynamically receive new data without page-refreshes, then go the AJAX route by making asynchronous background calls to the OPC Web Service to read updated Tag data that can be displayed within your page, without refreshes. A set of Helper Classes are supplied with the software, free.
The OPC Web Service has been tested at numerous OPC Interoperability Workshops in 2005, 2006 and 2007.
The OPC Web Service has also passed and received the OPC Self-Certified accreditation. This certification certifies:
- The OPC Client is indeed OPC Compliant
- Abides by the rules of OPC, and follows the Best Practices
- Does not crash even if working with an ill-behaved Server
- Is able to resume lost OPC Server connections
Insist on using only OPC Self-Certified software!
For full details on this product, please visit the OPC Web Client Focus Website.
If you need to run the OPC Web Service on more than one webserver, discounted additional server licenses are available.
