Breaker Data Adapter (BDA)
WL Circuit Breaker
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 cannot 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
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.
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
2.2.2.1after..." (connection OK) or "Reply timed out" (connection not available).
•Start the browser (Internet Explorer or Netscape Navigator)
•Entering the target IP address
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.
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WL MODBUS Communication and Electronic Accessories • January 2005
