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 Client

OPC Clients are applications that can connect to OPC Servers and extract all needed information.

One OPC Client can connect to OPC Servers from different vendors and differents clients can connect to one Server. But, what are OPC Servers and OPC Clients?

Clients can define objects in OPC Servers.

The above image shows an example connection:

The client created 2 groups, each one with 2 items. Look that the namespace is the same for all clients.