Web Browser First Connection - ABB AWT420 Manual

AW T4 2 0 U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | C O M/A W T4 2 0/ E T H E R N E T- E N R E V. C
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Web Browser first connection
In this section, the procedure for the first connection with a
web browser is shown. In this example Mozilla Firefox™ is used.
Because the AWT420 uses a self-signed certificate to prove its
identity, it is necessary to add a security exception to the
device.
Connect to the device writing the following on the browser's
address bar:
https://<IP Address>
The example shown connects to:
https://10.0.0.1.
Firefox displays the following message:
Figure 11 Firefox security warning
Press Advanced to show the error. Firefox displays two links in a
boxed frame.
Figure 12 Firefox security warning – advanced
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Web Browsers usually cache as much information as possible to speed up
the rendering of a web page. It might be therefore possible that, even if the
device is sending the most recent data, the web browser will not display it,
showing the cached data instead. This applies to both secured and
unsecured web connections. To avoid this problem, it might be necessary to
clear the web browser cache to force it to display the latest data the device
sent to it. Please refer to the web browser documentation to find out how to
clear cached data.
One of the links shows the error it found – in this case Unknown
issuer. The second link enables the digital certificate it received
from the device to be viewed. Click on the second link to view.
The following window is displayed:
Figure 13 Digital certificate example
The highlighted item (1161) is the Device Identifier of this
specific device. The operator must ensure this value
corresponds to the one visible locally in the device. It is then
possible to close this window and click on the button Accept
the Risk and Continue.
The browser then asks for a username and password. Once
entered, the main web page is visible after a few seconds.
Figure 14 Main web page
The operation is now complete.
Note. Once the security exception is added, the browser does
not show error messages and connects immediately after the
username and password are entered.
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