OPC Server Technology
OPC - What is it?
OLE for Process Control
(OPC) draws a line between hardware providers and
software developers. It provides a mechanism to provide
data from a data source and communicate the data
to any client application in a standard way. A vendor
can now develop a reusable, highly optimized server
to communicate to the data source, and maintain the
mechanism to access data from the data source/device
efficiently. Providing the server with an OPC interface
allows any client to access their devices.
There are 3 standard types of OPC servers available on the market:
- OPC Data Access server ,
i.e., the efficient reading and writing of data
between an application and a process control
device flexibly and efficiently;
- OPC Alarm & Event
server ,
i.e., the mechanisms for OPC Clients to be notified
of the occurrence of specified events and alarm
conditions, and
- OPC Historical Data server ,
i.e., the reading, processing and editing of
data of a historian engine.
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