Siemens SIMATIC HMI Operating Instructions Manual page 130

Configuring the operating system
6.2 WLAN
1. Select the required country code from the "Country Code" selection box.
2. Confirm your entries.
Result
The country code for the WLAN connection has been set.
Setting the transmission rate for WLAN
Use the register "Rate Control" to change the transfer rate of the HMI panel, if necessary.
130
The dialog closes.
Mobile Panel 277F IWLAN
Operating Instructions, 12/2007, A5E01003940-01