Description
2.6 C-PLUG and KEY-PLUG
SCALANCE W780/W740 to IEEE 802.11n Web Based Management
Configuration Manual, 03/2015, C79000-G8976-C267-08
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2.6
C-PLUG and KEY-PLUG
Configuration information on the C-PLUG / KEY-PLUG
The C-PLUG or KEY-PLUG stores the configuration of a device and can therefore transfer
the configuration of the old device to the new device.
NOTICE
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 present 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.
When the new device starts up with the PLUG, it then continues automatically with exactly
the same configuration as the old device. One exception to this can be the IP configuration if
it is set using DHCP and the DHCP server has not been reconfigured accordingly.
A reconfiguration is necessary if you use functions based on MAC addresses.
Note
In terms of the PLUG, the SCALANCE devices work in two modes:
•
Without PLUG
The device stores the configuration in internal memory. This mode is active when no
PLUG is inserted.
•
With PLUG
The configuration stored on the PLUG is displayed over the user interfaces. If changes
are made to the configuration, the device stores the configuration directly on the PLUG
and in the internal memory. This mode is active as soon as a PLUG is inserted. As soon
as the device is started with a PLUG inserted, the SCALANCE W700 starts up with the
configuration data on the PLUG.
Note
Incompatibility with previous versions with PLUG inserted
During the installation of a previous version of the firmware, 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".