W&T 57630, Manual

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W&T
OPC
5.8 OPC - standardized access
OPC (OLE for Process Control) is a software interface for
accessing process data based on the Microsoft OLE technology.
Application programs such as visualization systems that use this
interface are called OPC clients. On the other side of the interface
are OPC servers. These are device drivers that represent a
particular hardware in abstract form as a set of OPC variables.
The OPC server here implements the specifications of OPC Data
Access 2.0 and controls devices in the W&T Web-IO product
families, but also serial Com-Servers and the older digital I/O
servers.
In terms of architecture we are dealing - in contrast to the usual
implementation with a system service running in the background -
with a monolithic application which contains the actual OPC server
as well as operating elements for configuration and diagnostics.
5.8.1 Installing the OPC-Server
g
On our web site www.WuT.de, having selected the
Englisch language version, on the left side you find „Insi-
der search via article number“. Enter here the article no.
57630, select „Tools“ in the checkbox below and click „Go“. On
the page that will open, you select the link „OPC Server“.
For ease of downloading the files have been compressed into a
ZIP file. Save the decompressed files in any desired directory on
your hard disk (e.g., C:/Temp). Start the setup program by for
example going to
Run... in the Start menu and then entering:
„C:\Temp\Setup“. This installs and registers the OPC server on
your computer.
The OLE server name which the OPC clients will need later for
connecting to the server is:
Wiesemann-Theis.DigitalIO. The OPC
server starts automatically in response to such requests. To
configure the server you can also however run it manually. A