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OPC Unified Architecture (Hardcover, 2009 ed.)
Loot Price: R2,057
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OPC Unified Architecture (Hardcover, 2009 ed.)
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Motivation for This Book The OPC Foundation provides specifications
for data exchange in industrial au- mation. There is a long history
of COM/DCOM-based specifications, most pro- nent OPC Data Access
(DA), OPC Alarms and Events (A&E), and OPC Historical Data
Access (HDA), which are widely accepted in the industry and
implemented by almost every system targeting industrial automation.
Now the OPC Foundation has released a new generation of OPC
specifications called OPC Unified Architecture (OPC UA). With OPC
UA, the OPC Foundation fulfills a technology shift from the
retiring COM/DCOM technology to a servi- oriented architecture
providing data in a platform-independent manner via Web Services or
its own optimized TCP-based protocol. OPC UA unifies the previous
specifications into one single address space capable of dealing
with current data, alarms and events and the history of current
data as well as the event history. A remarkable enhancement of OPC
UA is the Address Space Model by which v- dors can expose a rich
and extensible information model using object-oriented techniques.
OPC UA scales well from intelligent devices, controllers, DCS, and
SCADA systems up to MES and ERP systems. It also scales well in its
ability to provide information; on the lower end, a model similar
to Classic OPC can be used, providing only base information, while
at the upper end, highly sophisticated models can be described,
providing a large amount of metadata including complex type
hierarchies.
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