Configuration / project engineering
5.6 Configuration with Web Based Management
SCALANCE W786-xPRO
Operating Instructions, Release 08/2007, C79000-G8976-C221-02
167
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Procedure for SCALANCE W-700 clients:
Using the URL
http://<IP address>/Signal.txt
or the URL
http://<IP address>/Signal.log
you can download the generated signal file. If you are not yet logged in, this opens the
login window in which you must log in.
●
Procedure for IWLAN/PB LINK PNIO:
1. Enable the FTP server
2. Enter
ftp <ip address>
in a DOS box.
3. Log in as admin (default password admin)
4. Enter the command get signal.txt.
The signal.txt file is then stored in the directory from which the ftp command (point 2)
originated.
Displaying the instantaneous value
The upper half of the window contains an instrument for displaying the graphic
representation of the currently calculated dBm value in real time. Depending on your browser
and the network load, the display is updated approximately every 500 ms. Apart from the
graphic display, the current dBm value is also displayed in plain language. The MAC address
of the AP with which the ECM is currently connected along with the frequency, channel and
transmission rate are also displayed and updated. You can start or stop the graphic display
with the "Start display" and "Stop display" buttons.
Note
Working with the graphic display can cause a not insignificant network load that can disturb
time- and throughput-critical processes (PNIO).
Recording a series of measurements
The lower half of the window includes not only the operator controls for graphic display of the
instantaneous value but also the controls for the actual signal recorder. You can set the
interval between the acquisition of two measuring points as well as the total number of
measuring points. The recorder is controlled by the "Start recording" and "Stop recording"
buttons.
As soon as measuring points have been recorded successfully and the recorder has been
stopped, the "Save recorder file" and "Display recorder file" buttons are enabled. With the
"Save" button, the measured values can be loaded directly from the ECM as a file in CSV
format and imported into a suitable evaluation program.
The CSV file contains the MAC address of the AP for every measuring point, the current
number of the measurement, the raw value of the RSSI, the dBm value and its
corresponding percentage value, a roaming indicator, the channel and the transmission rate.
The "Display record file" button opens a pop-up window in which the measured values over
time is already available in graphic form. The dBm values are shown over time. If the ECM
roams during the measurement, blue bars indicate the event. If you move the mouse pointer
over such a bar or over the flag at the top of the bar, a tooltip with the MAC addresses of the
two access points appears.