Communication with peripherals - drivers
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Drivers and channels In Control Web,
so-called drivers are used to connect devices. Some drivers
are part of the system installation. Some need to be
installed. The basic principle of working with drivers can
be found in the article. here. A
complete list of drivers, including their documentation, can
be found here. |
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Control Web and OPC OPC is today one of the
most widely used program communication interfaces in
industrial automation. Thanks to standardization, it enables
easy communication between products of different
manufacturers. The older OPC Clasic version is
supported by the OPC Client
driver.. The newer OPC UA (Unified Architecture)
is supported by the OPC UA Client
driver. |
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Communication with DataLab input/output
unit So that every user can try communication, work
with channels and set driver parameters, We have prepared a
DataLab and placed it on a public IP address. You can test
the communication in the sample
application. For a complete description of how
to create such an application, see the following article. |
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Working with Microsoft Excel Part of the
Control Web 8 installation is a driver for communicating
with Microsoft Excel. The driver allows you to work from a
Control Web application with Microsoft Excel spreadsheets.
The spreadsheet driver uses Microsoft Excel, so Microsoft
Excel is required to be installed at least 2007. Excel is
running as a stand-alone process when it is working with a
spreadsheet, it can be visible or hidden. You can
download the sample application here. A detailed description of the
driver can be found here. |
Control Web as a web server
If you insert an httpd instrument into the
application, HTTP or HTTPS server will be included. In the
following simple examples we will show some of its basic
options.
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Displaying variables Web server
can insert values of variables from application into
prepared HTML document. |
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Displaying instruments The
current appearance of any instrument in the application can
be viewed in a web browser. The httpd instrument (web
server) can render any instrument to memory on demand,
create an image and send it to the client. |
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Dynamic generation of HTM
document HTML documents can be dynamically
generated by the application procedure at every
request. |
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Access to the Control Web's archived data from the
Web It is possible to display archived data via a web
server, for example in the form of graphs. For a
complete description of how to create such an application,
see the following article. |
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