Configuration / project engineering
5.6 Configuration with Web Based Management
SCALANCE W786-xPRO
Operating Instructions, Release 08/2007, C79000-G8976-C221-02
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5.6.4.3
WLAN menu command
Enabling the interface
Enable the interface by selecting "Enable Interface".
Network name (in access point mode only)
Enter the network name of the wireless network in the "SSID" input box. If you have used the
Basic Wizard, a value is already entered here.
Infrastructure / Ad-Hoc (only for clients or access points in client mode)
Select Infrastructure to connect to an access point. "Ad hoc" is used to connect clients with
each other without an access point. This is only possible when "Ad hoc" is set on all clients.
Transmission mode
Specify the transmission mode in the "Wireless Mode" list box. If you have used the Basic
Wizard, a value is already entered here.
Note
IEEE 802.11h transmission
It is not possible to select the 802.11h protocol in all country settings. It is specified by the
configuration of Country code on the System page.
If the 802.11h protocol is selected, after applying the configuration with Set Values, the
comment (DFS is active for this country code) appears behind the Enable Interface check
box.
With the automatically enabled Dynamic Frequency Selection function (DFS), prior to
communication, the access point checks whether the configured or selected channel (see
Auto Channel Select) is free of signals from a primary user (for example radar).
If signals of a primary user are found on the configured or selected channel, the access point
follows the procedure outlined below:
•
Auto channel select = enabled
With automatic channel select, the access point changes to a different channel and
repeats the availability check for this channel.
•
"Auto channel select" = disabled
If there is a fixed configured channel, the access point changes to the configured
alternative channel and repeats the availability check for this channel. If a primary user (for
example radar) is discovered on the alternative channel, a further channel is selected at
random.
Communication with clients is started only when no primary user has been discovered on the
selected channel for one minute.
When operating PNIO systems with wireless standard 802.11h, make sure that no radar
signals occur in the vicinity of the system. Due to the DFS strategy in 802.11h, there is a
channel change if radar signals are detected.
