Configuring with Web Based Management   
6.5 "System" menu 
  SCALANCE W780/W740 to IEEE 802.11n Web Based Management 
258  Configuration Manual, 08/2018, C79000-G8976-C267-13 
 
 
 
Do not remove or insert a C-PLUG / KEY-PLUG during operation! 
A PLUG may only be removed or inserted when the device is turned off. 
The device checks whether or not a PLUG is inserted at one second intervals. If it is 
detected that the PLUG was removed, there is a restart. If a valid KEY-PLUG was inserted 
in the device, the device changes to a defined error state following the restart. With 
SCALANCE W, the available wireless interfaces are deactivated in this case. 
If the device was configured at some time with a PLUG, the device can no longer be used 
without this PLUG. To be able to use the device again, reset the device to the factory 
settings. 
Information about the configuration of the C-PLUG / KEY-PLUG  
This page provides detailed information about the configuration stored on the C-PLUG or 
KEY-PLUG. It is also possible to reset the PLUG to "factory defaults" or to load it with new 
contents. 
 
Note 
The action is only executed after you click the "Set Values" button.
 
The action cannot be undone.
 
If you decide against executing the function after making your selection,
 click the "Refresh" 
button. As a result the data of this page is read from the device again and the selection is 
canceled.
 
 
Note 
Incompatibility with previous versions with PLUG inserted 
During the installation of a previous version, the configuration 
data can be lost. In this case, 
the device starts up with the factory settings after the firmware has been installed. In this 
situation, if a PLUG is inserted in the device, following the restart, this has the status "NOT 
ACCEPTED" since the PLUG still has
 the configuration data of the previous more up-to-
date 
firmware. This allows you to return to the previous, more up
-to-date firmware without any 
loss of configuration data. 
 
If the original configuration on the PLUG is no longer required, the PLUG can be 
deleted or 
rewritten manually using "System > PLUG".