Configuring with Web Based Management
5.10 "iFeatures" menu
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
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In access point mode, the table has the following additional columns:
●
PNIO Support
Enable or disable optimized support of PNIO.
●
iPCF Cycle Time [ms]
Select the required cycle time from the drop-down list.
The following points need to be taken into account when setting the cycle time. Otherwise
it may not be possible to establish stable communication.
–
There is only one access point in the system; in other words, the clients move only in
one wireless cell. In this case, update times >= 16 ms are supported.
–
There are several access points in the system that communicate over different
channels. The clients roam between the access points. In this case, select update
times >= 32 ms.
In addition to the guide values shown above, remember that the shortest cycle time to be
set is calculated according to the formula "2 ms * max. number of nodes".
●
Scanning Mode
The selected setting affects the scanning behavior of the logged-on clients.
The following settings are available:
–
All Channels
The client scans all permitted channels and selects the access point with the best
signal strength and connects to it.
–
Next Channel
The client scans the next channel from its permitted channel list. If an access point is
there, it connects to it. If it does not find an access point on this channel, it scans the
next channel.
●
Signal Quality Threshold
Can only be configured if "Scanning Mode" "Next Channel" is enabled. The client is given
a minimum signal strength with which the access point must be seen during the scan so
that a connection can be established to it.
The following threshold values exist for the signal strength:
Level
Signal quality in RSSI
Signal quality in %
1
20
40
2
25
50
3
30
60
4
35
70
5
40
80
Procedure
In access point mode
1.
Select the "Enable iPCF" option for the required WLAN interface.
2.
Select the required cycle time for the access point from the "iPCF Cylce Time [ms]" drop-
down list.
3.
Select for example "All Channels" from the "Scanning Mode"drop-down list.