Siemens SCALANCE M812, Руководство по эксплуатации

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Function
Devices with a PLUG slot support the following operating modes:
• Without PLUG
The device saves the configuration data in the internal memory. This mode is active when no
PLUG is inserted.
• With PLUG
In the startup phase:
– If an empty PLUG (as supplied) is inserted in the device, the device automatically backs
up the configuration data on the PLUG during startup. After that, it behaves like a PLUG
with data.
– When a PLUG with data is plugged into a device, the device automatically adopts the
configuration of the PLUG during the startup phase. The prerequisite for this is that the
configuration data was written by a compatible device type.
One exception to this can be the IP configuration if it is set using DHCP and the DHCP
server has not been reconfigured accordingly. Reconfiguration is necessary if you use
functions based on MAC addresses.
– If the PLUG contains a license, additional functions are also enabled.
Note
If the device was configured at some time with a KEY-PLUG or PLUG license, 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.
During operation:
– During operation, changes to the configuration are saved on the PLUG and in the internal
memory.
– The configuration data of the device is stored in a secured memory area of the PLUG. This
secured memory area can only be accessed via the authentication of the Siemens device.
– The device checks whether or not a PLUG is inserted at one second intervals. If the device
detects that the PLUG has been removed, it restarts automatically.
NOTICE
Operating risk - Danger of data loss
Only pull and plug the PLUG when the device is de-energized.
– The device signals deviations from normal operation of the PLUG (e.g., incompatible
data, incorrect operation or malfunctions) via the existing diagnostic mechanisms (e.g.,
LEDs or user interfaces). The user then has the choice of either removing the PLUG again
or selecting the option to reformat the PLUG.
The procedure for pulling and plugging the PLUG can be found in the section "Replacing the
PLUG" in the operating instructions for the device.
See also
Replacing the PLUG (Page 54)
Description of the device
3.8 PLUG
SCALANCE M826
Operating Instructions, 10/2022, C79000-G8976-C362-07
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