Siemens SIMATIC 277 IWLAN, Getting Started

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HMI Device Mobile Panel 277 IWLAN
Getting Started, 04/2008, A5E01004533-01
3.3 Configuration of multiple wireless networks
There are usually several access points in the plant to be operated and therefore
several wireless networks. In WinCC flexible, you can store up to three SSIDs
for wireless networks in the device settings:
This configuration requires the wireless networks to be registered in the WLAN
settings of the HMI device.
When you transfer the project to the HMI device, the list of the preferred wireless
networks for the HMI device is updated: The wireless networks entered in the
device settings are placed at the top of the list of preferred wireless networks.
During operation, the HMI device attempts to connect to the wireless networks
from the list of preferred wireless networks. The device goes through the list from
top to bottom until a connection is established.
When the “Allow other SSIDs”
option is selected, the system
also attempts to connect to
wireless networks other than
those listed.
When the “Allow other SSIDs”
option is cleared, the system
also attempts to connect only
to the listed wireless net-
works.