Inspection
Work Planning
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The legacy family of Microsoft COM/DCOM-based OPC specifications for industrial interoperability.
OPC Classic is the collective term for the original family of OPC interoperability specifications based on Microsoft COM/DCOM technology. It includes the OPC Data Access (DA), Historical Data Access (HDA) and Alarms and Events (A&E) specifications, which standardized communication between industrial control systems, devices and software applications.
OPC Classic established the first widely adopted vendor-independent standards for industrial interoperability.
Although largely superseded by OPC Unified Architecture (OPC UA), OPC Classic remains widely deployed in existing industrial facilities and continues to be supported by many automation vendors.
OPC Classic comprises the original COM/DCOM-based OPC specifications, whereas OPC Unified Architecture provides a modern, platform-independent interoperability framework.
Industrial Automation; Information Management; System Integration.
Process automation.; Manufacturing.; Oil and gas.; Utilities.; Industrial control systems.
OPC Foundation
VisualAIM connects glossary concepts to the asset records, inspection histories, and workflows they describe.
