OPC DataHub Bridges Multiple OPC Servers, Allowing them
to Exchange Data
Now any number of OPC servers can connect and share
data among themselves. The OPC DataHub supports bidirectional
data flow and linear transformations, with easy
point-and-click configuration. Bridges can be local or across
a network, using the OPC DataHub's built-in tunnelling
Georgetown, Ontario (March 21, 2006) The OPC DataHub, newly released by Cogent
Real-Time Systems, can connect to any number of OPC servers,
and supports point-to-point data bridging among them. Bridges
can be configured as forward, inverse, or bidirectional, and
the OPC DataHub can transform the data mathematically as it
crosses the bridge. A revolutionary bridging configuration
interface allows single-screen setup and viewing of all
"Bridging two OPC servers is now as easy as 1-2-3," said
Mr. Andrew Thomas, president of Cogent. "Click a source point,
click a destination point, and then click 'Apply'. The data
starts flowing immediately."
OPC DataHub support for linear transforms lets users
convert data from one unit or scale to another. For example, it
can convert a value in Fahrenheit to Celsius, or a 4-20 mA
signal into a zero to 100% scale value. Conversions are done
within the OPC DataHub as the data passes across the bridge from
one OPC server to the other. To support more complex data
manipulation needs, the OPC DataHub also comes with a built-in
"One of the many applications for this technology is
bridging fieldbus protocols," said Mr. Thomas. "Any fieldbus
that connects to OPC can now be easily bridged to any other.
This opens a lot of doors."
Because the OPC DataHub also supports OPC tunnelling, the
different OPC severs can be anywhere on a network. They can
exchange their data through firewalls, avoiding the problems
associated with DCOM.
In addition to bridging OPC servers, the OPC DataHub also
bridges other applications and operating systems. It can be
used to bridge OPC servers and Excel spreadsheets, ODBC
databases, web browsers, or applications running in Linux or
QNX. All of these bridges support 2-way read/write access to
and from OPC servers, as well as linear transformations.
The OPC DataHub builds on Cogent's established middleware
technology, first introduced in 1995 and currently in use in
thousands of systems worldwide. This technology allows users to
seamlessly integrate data across multiple Windows, Linux and QNX
Founded in 1995, Cogent Real-Time Systems is
the leader in real-time cross-platform data integration between
Windows, Linux and QNX. Customers include the Bank of Canada, Cadbury
Chocolate and the European Space Agency. Cogent leverages its
experience in real-time data communications to provide the next
generation of OPC products.