Connection to the BDA via the Serial Communication System
To operate the BDA, it must be
connected to the target system
(e.g. a PC) on one side and a
circuit breaker on the other. A
range of options are available,
depending on the application
and operating system.
To ensure that serial communication
is possible between the target
system and the BDA, you should
carry out the following steps:
• Connect the BDA to the circuit
breaker and power supply.
• Connect the BDA to the COM
interface of the target system
(e.g. PC) using a fully assigned
null modem cable.
Note:
With
a null modem cable, pins 2 and
3, 4 and 6, and 7 and 8 must
be assigned and reversed with
respect to each other. The COM
port can not be used by a
different application.
• Installing a standard modem.
Once the physical connection
has been established using a null
modem cable, a standard modem
must be installed on each PC.
The procedure for installing the
modem varies slightly depending
on the operating system. The
screenshots on the following
pages provide a step-by-step guide
to the procedure. The standard
modem to be selected – 28800
bps – is not related to the actual
transmission rate. The examples
illustrate the connection to the
COM1 interface; other interfaces
must be set accordingly. The
installation process always begins
in the Control Panel of the
operating system. The default
settings in the “Properties”
windows of the modem do not
usually have to be changed.
They are shown as a reference.
The screenshots on the following
pages for Windows98 are identical
for Windows95, WindowsNT, and
WindowsME. WindowsXP screens
are virtually the same as those in
Windows2000.
• Installing a data communications
connection.
Once a standard modem has
been installed, a communications
link must be established via this
modem. To do so, a data
communications connection must
be set up via “Workstation > Data
Communications Network.” Once
the appropriate modem has been
selected, the maximum rate has
to be selected again. The name
of the connection is user defined,
while the user name must be
“ppp” and the address signal
“555.” A preselection code and
password must not be entered.
All of these settings are shown on
the following pages. Windows98
screenshots are used to represent
the operating systems
Windows95, Windows98;
WindowsNT, and WindowsME.
Only the screenshots from
WindowsXP are used for
Windows2000 and WindowsXP.
• Establishing the connection.
A communications link is
established by activating the
installed data communications
connection. Once the user name
and password have been checked
(a password must not be entered),
the window for establishing the
connection disappears from the
Windows systray. The systray is
the area on the bottom right next
to the system clock in the toolbar.
A small icon with two computers
appears here. Double-clicking
this opens a window displaying
the properties of this connection.
A test ping can also be used to
check that the connection has
been established correctly. Once
you have opened the entry screen
(Start > Execute) and entered “ping
2.2.2.1,” a DOS box appears that
displays either “Reply from 2.2.2.1
after...” (connection OK) or “Reply
timed out” (connection not
available).
• Start the browser (Internet
Explorer or Netscape Navigator)
• Entering the target IP address
2.2.2.1.
You have to enter 2.2.2.1 in the
address line. The usual “http://”
does not have to be entered.
When you press ENTER, the pages
will be loaded from the BDA.
Note:
You may have to include
the address 2.2.2.1 in the list of
addresses that do not use a proxy
server. The use of a proxy server
is optional and depends on the
network.
A desktop link can be created if the
BDA connection is used frequently.
To create an Internet Explorer link
with the local IP address of the
BDA on the desktop, you have to
drag the Internet Explorer icon in
the address line to the left of the
address to the desktop. Alternatively,
the BDA start icon can be used. To
do so, press the left mouse button
to save it on the hard disk as a
bitmap and specify it as an icon in
the properties window of the link
saved on the desktop.
4/8
Breaker Data Adapter (BDA)
WL Circuit Breaker
WL PROFIBUS Communication and Electronic Accessories • July 2004
