Operating Instructions and Troubleshooting
The BDA supports state-of-the-
art communications technology.
It can be implemented
regardless of the operating
system and browser used.
The instructions provided
here, show you how to
make particular settings.
A troubleshooting table is
included at the end to help
you solve any problems.
Languages and Help
The BDA interface is in German and
English. The language is selected
every time the browser is started.
In addition to the HTML pages
and Java applets, the BDA stores
the accompanying help pages in
different languages. The help pages
can be called up where they are
available via the question mark icon
in the top right-hand corner of the
screen. They are available whenever
the BDA is activated. The help pages
are available in German and English.
Offline/Online Mode
The BDA (and BDA Plus) can be run
in two different operating modes.
Online mode
Online mode is activated
automatically when the BDA is
connected to a circuit breaker. In
this mode, the current operating
and diagnostic data, as well as
the parameters are displayed and
loaded directly to the circuit breaker
after they have been changed.
Online mode is indicated by a
green
Cubicle
BUS
LED.
If the connection to the circuit
breaker is interrupted, the BDA
switches to offline mode. This also
occurs if a file has been opened
under “Parameter Transfer” or
received from the circuit breaker.
Offline mode
If the BDA is supplied with 24V DC
and is not connected to a circuit
breaker, the BDA starts in Offline
mode, indicated by the
Cubicle
BUS
LED not illuminated. Offline mode is
used to configure the BDA even if it
is not connected to a circuit breaker,
and save this file for later use.
To switch from Offline to Online
mode, first connect a circuit breaker.
You then press either the “Online”
or “Send Parameters” button in
“Parameter Transfer.”
Displaying Data
WL Circuit Breakers use “Property
Bytes,” which provide information
on the required value, such as
whether it is available, or readable
and/or writable. The display then
changes depending on the
property byte.
If a value is not available, for
example, because the circuit
breaker does not have any neutral
conductor protection (N-conductor
protection parameter), it is displayed
as an empty white field with no
outline.
If a value is available, the system
differentiates between whether it is
only readable or also writable. “Read
Only” data is displayed in black on a
gray background in a black, outlined
field. If the value is also writable,
the background is white.
Values that are available but not
currently valid are displayed in red.
This could be the case, for example,
if the number of measured values
available for calculating the long-
term values of the current is
insufficient because the circuit
breaker has just been closed.
4/24
Breaker Data Adapter (BDA)
WL Circuit Breaker
Figure 4-19
The way data is displayed on the BDA pages depends on the property byte.
This tells you which data is read only, which data can be written, and which data is not available.
WL PROFIBUS Communication and Electronic Accessories • July 2004
