What is OPC?
OPC is the interoperability standard for the secure and reliable exchange of data in the industrial automation space and in other industries. It is platform independent and ensures the seamless flow of information among devices from multiple vendors. The OPC Foundation is responsible for the development and maintenance of this standard.
The OPC standard is a series of specifications developed by industry vendors, end-users and software developers. These specifications define the interface between Clients and Servers, as well as Servers and Servers, including access to real-time data, monitoring of alarms and events, access to historical data and other applications.
When the standard was first released in 1996, its purpose was to abstract PLC specific protocols (such as Modbus, Profibus, etc.) into a standardized interface allowing HMI/SCADA systems to interface with a “middle-man” who would convert generic-OPC read/write requests into device-specific requests and vice-versa. As a result, an entire cottage industry of products emerged allowing end-users to implement systems using best-of-breed products all seamlessly interacting via OPC.
Initially, the OPC standard was restricted to the Windows operating system. As such, the acronym OPC was borne from OLE (object linking and embedding) for Process Control. These specifications, which are now known as OPC Classic, have enjoyed widespread adoption across multiple industries, including manufacturing, building automation, oil and gas, renewable energy and utilities, among others.
With the introduction of service-oriented architectures in manufacturing systems came new challenges in security and data modeling. The OPC Foundation developed the OPC UA specifications to address these needs and at the same time provided a feature-rich technology open-platform architecture that was future-proof, scalable and extensible.
Today the acronym OPC stands for Open Platform Communications.
These are just some of the reasons why so many members and other technology organizations (collaborations) are turning to OPC UA for their interoperability platform.
To learn more about the collaborations currently underway, contact the OPC Foundation.
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The Industrial Interoperability Standard™
- About
- What is OPC?
- OPC Technologies
- Unified Architecture (UA)
- UA Roadmap
- UA Companion Specifications
- Classic
- Mission Statement
- History
- Organization
- OPC Offices / OPC Hubs
- Experts
- List of Working Groups
- OPC-F Working Groups
- Joint Working Groups
- Guidelines and Templates
- OPC Code of Conduct
- Members
- Benefits
- Become a Member
- OPC Marketplace
- Certified Products
- Overview & Benefits
- How to Certify
- Policies & Procedures
- Test Tools
- Purchase Test Tool
- Interoperability Workshops
- Material
- Presentations
- Logos
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- eBooks
- Success Stories
- Technology Articles
- Books
- Videos
- Podcast
- News
- Bulletins
- UA Specifications
- Classic
- Other
- Unified Architecture
- Classic
- OPC Foundation News
- OPC UA Technology News
- OPC Foundation Events
- OPC Foundation Webinars
- OPC Connect Newsletters
- Press Releases
Welcome to the World of OPC
In today’s complex economy, information is the key to business success and profitability. OPC technologies were created to allow information to be easily and securely exchanged between diverse platforms from multiple vendors and to allow seamless integration of those platforms without costly, time-consuming software development. This frees engineering resources to do the more important work of running your business. Today, there are more than 5,200 suppliers who have created more than 42,000 different OPC products used in more than 52 million applications. The estimate of the savings in engineering resources alone is in the billions of dollars.
OPC News
Available: Presentations, Recordings and Q&A from OPC Day 2023 – International
Scottsdale, AZ – July 1th, 2023: The OPC Foundation would like to thank all participants for their participation and all speakers for their amazing support at the “OPC Day 2023 – Interational”. With 2142 registered attendees in 2023, we saw a significant increase in the number of participants compared to last year with 1814 attendees. […]
ANIE Automazione and OPC Foundation announce Liaison Agreement Agreement to cooperate on adaption of OPC UA
Parma, Italy May, 23rd 2023 – ANIE Automazione and OPC Foundation are proud to announce a comprehensive collaboration program, focusing on the technology transfer and adoption of OPC UA for the Italian market. ANIE Automazione and OPC Foundation have agreed to the following activities: Realizing interoperability demos on the “field level” and “field-to-cloud” paradigms. Extensive […]
OPC Foundation Extends OPC UA with standardized REST-Interface
OPC UA via HTTP REST allows IT-Applications access to OPC UA applications and their data described in over 90+ standardized domain-specific information models Scottsdale – AZ, April 17, 2023 – The OPC Foundation, a global organization dedicated to the interoperability in industrial automation and the Internet of Things (IoT), has announced that it expands the […]
Bitkom and the OPC Foundation cooperate for the common goal of establishing and implementing interoperable interfaces for Industrie 4.0
Hanover, April 17, 2023 – The digital association Bitkom e.V. and the OPC Foundation today announced a collaboration at Hannover Messe 2023. Together, they want to contribute to the establishment and implementation of interoperable interfaces in the context of Industrie 4.0 in a constructive exchange of views. The overall goal of the cooperation is to […]
Associations AutomationML e.V., IDTA, OPC Foundation and VDMA publish a joint target picture and recommendations for action for industrial interoperability
Hanover – Germany, April 17, 2023: The associations AutomationML e.V., Industrial Digital Twin Association (IDTA), OPC Foundation and VDMA announce the publication of a jointly prepared discussion paper on ” Interoperabilität mit AutomationML, der Verwaltungsschale, OPC UA inklusive Companion Specifications”. The (German language only) paper is available for download from the respective organizations. Download here […]
FAQs
OPC is the interoperability standard for secure and reliable information exchange in industrial automation and the enterprise. The original OPC specification was developed in the mid-1990s by a group of automation industry vendors to standardize data exchange between software applications and industrial automation hardware devices. The OPC specifications define an interface between clients and servers, and servers-to-servers, so system components like PLCs, HMIs and any OPC-aware device can share data without having to develop custom software device interface applications.
Why is OPC important?
The OPC standard brings plug-and-play connectivity to industrial automation. Before OPC, application vendors had to develop custom software for every third-party device and application that needed to be integrated into the automation system. With OPC, you get open connectivity across products, independent of your hardware or software platform. OPC defines the standard way for sharing real-time data, historical data, and alarms & events, reducing your integration and total life cycle costs for system implementations.
What are the OPC technologies?
The two primary technologies that comprise the OPC standards are OPC Classic and OPC UA (Unified Architecture). OPC Classic is the original architecture, first released in 1996, based on Microsoft Windows technology, using COM/DCOM (Distributed Component Object Model) which was the Microsoft standard for software application communication. OPC UA integrates all the functionality of the existing OPC Classic specifications into a single service-oriented architecture, while adding new features to OPC, such as platform independence, complex information modeling, security, and reliability.
What is OPC UA?
As the next-generation of OPC technology, OPC UA (Unified Architecture) is a major leap forward for secure, reliable and platform independent interoperability. OPC UA is designed for the transport of data and information from first-tier factory and process control devices through to the enterprise information system. The OPC UA specification, first released in 2008, integrates all the functionality from the existing OPC Classic specifications into a single service-oriented architecture. It adds essential new features, such as platform independence, diagnostics, discovery, rendering of complex information models, security, and reliability. Additionally, OPC UA was released as an IEC Standard, IEC 62541 in October 2011. OPC UA provides a single set of services for the OPC data models, such as Data Access, Alarms & Conditions, and Historical Access and can be implemented on non-Microsoft systems, including embedded devices. OPC UA provides services for simple / complex information models of vendors and consortia to be “plugged in” to the address space of OPC UA. This information modeling feature allows generic software applications to browse, read, write and subscribe to a whole new world of information.
What is OPC Classic?
The OPC Classic specifications are based on Microsoft Windows technology, using COM/DCOM (Distributed Component Object Model) for communication among software components in a distributed client-server network. The OPC Classic specifications provide separate specifications for exchanging process data, alarms and historical data. The original OPC Classic specification is OPC DA (Data Access), which defines an interface between client and server applications to exchange process and manufacturing data. Other important OPC Classic specifications include OPC Alarms & Events (OPC AE) and OPC Historical Data Access (OPC HDA). OPC Classic continues to be an integral part of the OPC technology portfolio. In 2010, OPC Classic was enhanced with the OPC .NET 4.0 specifications to adapt to the new technical innovations of the Microsoft platforms providing better connectivity, reliability, security and interoperability.
What is the OPC Foundation?
- Provide an international infrastructure to facilitate users, vendors and consortia to cooperate together to develop standards for multivendor, multiplatform, secure and reliable interoperability in industrial automation
- Develop, maintain and bring to market the specifications for the OPC standards
- Certify member products
The OPC Foundation is dedicated to providing the best specifications, technology, and product certification.
Supplier members are provided a complete infrastructure to rapidly develop quality OPC certified products.
End-user members gain access to myriad of technical information and innovation to be able to successfully use the OPC technology and OPC products from the OPC Foundation community to easily be able to assemble complex complete automation system/solutions.
Who are the members of the OPC Foundation?
More than 450 companies who develop, promote and use OPC technology make up the OPC Foundation. Members, who include technology providers, end-users and organizations such as universities and researchers, work together to provide the best and most widely used connectivity standards available. All OPC Foundation members are listed with a company profile in the official OPC Foundation Member Directory.
Why should I join the OPC Foundation?
By joining the OPC Foundation, your company can influence how OPC is developed and deployed into the future. Memberships include: Corporate (technology developers), End-users (technology consumers), and Affiliate members. Members can participate in the OPC community by joining technical working groups and participate in ongoing specification development. All members are listed in the OPC Foundation Member Directory—with company profile and contact info—and can display the OPC Foundation Member logo. Corporate members can list their products in the OPC Foundation Product Directory and have complete access to all the OPC specifications (released and under development), reference technology implementations, and the OPC Certification Test Tools.
What is the OPC Foundation Certification Program?
The OPC Foundation Certification Program (developed and maintained by the OPC Foundation) provides the infrastructure, tools and processes to facilitate OPC Foundation members in the development of products that conform to the OPC specifications and interoperability requirements. The OPC Foundation Certification Program assures end-users that products from OPC Foundation members meet and exceed user expectations for plug-and-play, secure and reliable interoperability. OPC Foundation-sanctioned Test Labs provide independent, objective and highly competent verification and certification testing, using a variety of tools and testing techniques that simulate real-world use. To become certified, a product must pass all tests, including Compliance, Interoperability, Robustness, Best Practices and Usability. Once a product has been certified, the vendor will receive a “Certified” Logo for use only with the product that has passed the certification tests. Vendors displaying the Certification Logo must abide by the Logo License Agreement.
What resources are available to learn about the OPC technology?
The OPC technology has literally thousands of vendors that have brought quality OPC products to market. End-users have successfully been able to use OPC to achieve multi-vendor interoperability throughout industrial automation. The OPC Foundation provides a comprehensive list of resources for both suppliers and end-users. The OPC Foundation resources for suppliers include the OPC specifications, reference implementations of the technology, quality developer documentation, and a complete certification program. The OPC Foundation also provides a repository of information about member companies inclusive of products and services to rapidly develop OPC products. Additional information including articles, white papers, books and webinars is also catalogued as resources on the OPC Foundation website. The OPC Foundation resources for end-users includes the OPC specifications, the OPC Foundation product catalog (identifies all supplier member products and services), and a complete one-stop reference of information about OPC (which includes application success stories).
При подготовке материала использовались источники:
https://opcfoundation.org/about/what-is-opc/
https://opcfoundation.org/
https://opcfoundation.org/faq/