Siemens SIMATIC NET SCALANCE W780 Series Configuration Manual page 60

Technical basics
4.7 iPCF / iPCF-HT / iPCF-MC
● Access points with a WLAN interface cannot take part in the iPCF-MC procedures, iPCF
is, however, possible.
● iPCF-HT is available only on WLAN interface 1 and can only be used in the 5 GHz band
with WLAN mode "(only) IEEE 802.11n".
Requirements for iPCF-MC
iPCF-MC uses the two wireless interface of the access point in different ways: One interface
works as the management interface and sends a beacon every five milliseconds. The other
interface transfers the user data.
The following requirements must be met before you can use iPCF-MC:
● Only SCALANCE W700 devices with two WLAN interfaces can be used as access points
● The data interface (WLAN1) and management interface (WLAN2) must be operated in
the same frequency band and must match in terms of their wireless coverage. iPCF-MC
will not work if the two wireless interfaces are equipped with directional antennas that
cover different areas.
● The management interfaces of all access points to which a client can change must use
the same channel. A client scans only this one channel to find accessible access points.
● Transmission based on IEEE 802.11h (DFS) cannot be used for the management
interface. 802.11h (DFS) is possible for the data interface.
● A client must support this feature on its WLAN interface.
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SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 08/2018, C79000-G8976-C267-13