Introduction | OPC Technology | OPC Specifications
OPC Data Access Specification | DCOM Configuration | References

OPC Data Access Specification

OPC Item | OPC Group | OPC Server | OPC Client | The Namespace

OPC DA(OPC Data Access) is the oldest OPC Foundation specification. It defines an interface between clients and servers for real-time data access.

OPC DA consists of four basic objects: OPC Server, OPC Client, OPC Group and OPC Item.