Siemens SIMATIC NET SCALANCE MUM856-1, Руководство по эксплуатации

Страница: 28 / 85

Description of the device
3.7 CLP
SCALANCE MUM856-1
28
Operating Instructions, 08/2021, C79000-G8976-C628-02
NOTICE
Do not remove or insert a PLUG during operation!
A PLUG may only be removed or inserted when the device is turned off.
The device checks whether a PLUG is inserted at one second intervals. If it is detected that
the PLUG was removed, there is a restart.
If the device was configured at one time with a 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.
NOTICE
Loss of water and dust protection
If the cover is not mounted correctly, the device is not water and dust proof.
Position
The PLUG slot is at the top of the device enclosure under a cover, see Reset button (Page 26).
How it works
The device supports the following modes of operation:
•
Without PLUG
The device saves the configuration data in the internal memory. This mode is active when
no PLUG is inserted.
• With PLUG
If an empty PLUG (as supplied) is inserted in the device, the device automatically backs up
the configuration data on the PLUG during startup. If the PLUG contains a license,
additional functions are also enabled. Changes to the configuration are stored directly on
the PLUG and in the internal memory.
The configuration stored on the PLUG is displayed over the user interfaces.
When an unconfigured device starts up, it automatically adopts the configuration data of
the inserted, written PLUG. 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.