Technical data

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W&T
3.11 OPC - Standardized access
OPC (OLE for Process Control) is a software interface for
accessing process data based on OLE technology from
Microsoft.
Application programs such as visualization systems which use
this interface are called OPC clients. On the opposite side of
the interface are OPC servers. These are device drivers which
represent certain hardware in abstract form as a set of OPC va-
riables.
The OPC server used here implements the specifications OPC
Data Access 2.0 and Alarms & Events. The server controls
devices in the W&T Web-IO product families, but also serial
Com-Servers and the older Digital I/O Server.
In terms of the architecture this is a system service running in
the background and a monolithic application which contains
the operating elements for configuration and diagnostics.
3.11.1 Installing the OPC-Server
The OPC server can be found on the product CD / DVD or on
included with the Web-IO, in the Web-IO Digital section.
g
On our Web site www.WuT.de you will find at left the
„Article number search“ function. Enter here for example
article number 57661, select „Tools“ from the field below
and click on „Go“. On the page that then opens select the link
„OPC-Server“.
For ease of downloading the required files are compressed in a
Zip file. Save the extracted file in any desired directory on your
hard drive (e.g. C:/Temp). Start the setup program by for
example selecting Run from the Start menu and then entering:
„C\Temp\opc_en.msi“ (choose the version for your language).
This installs and registers the OPC server on your computer.