Siemens SCALANCE MUM853-1 - Page 32

Position
The CLP slot is at the bottom of the device enclosure under a cover, see Reset button (Page30).
Function
Devices with a CLP slot support the following operating modes:
• Without CLP
The device saves the con󹪝guration data in the internal memory. This mode is active when no
CLP is inserted.
• With CLP
In the startup phase:
– When an empty CLP (delivery state) is inserted into the device, the device automatically
backs up the con󹪝guration data on the CLP during startup. After that, it behaves like a CLP
with data.
– When a CLP with data is plugged into a device, the device automatically adopts the
con󹪝guration of the CLP during the startup phase. The prerequisite for this is that the
con󹪝guration data was written by a compatible device type.
One exception to this can be the IP con󹪝guration if it is set using DHCP and the DHCP
server has not been recon󹪝gured accordingly. Recon󹪝guration is necessary if you use
functions based on MAC addresses.
– If the CLP contains a license, additional functions are also enabled.
Note
If
the device was con󹪝gured at some time with a CLP license, the device can no longer be
used without this CLP. To be able to use the device again, reset the device to the factory
settings.
During operation:
– Dur
ing operation, changes to the con󹪝guration are saved on the CLP and in the internal
memory.
– The con󹪝guration data of the device is stored in a secured memory area of the CLP. This
secured memory area can only be accessed via the authentication of the Siemens device.
– The device checks whether a CLP is inserted at one second intervals. If the device detects
that the CLP has been removed, it restarts automatically.
NOTICE
Operating risk - Danger of data loss
Onl
y pull and plug the CLP when the device is de-energized.
– The
device signals deviations from normal operation of the CLP (e.g., incompatible data,
incorrect operation or malfunctions) via the existing diagnostics mechanisms (e.g., LEDs
or user interfaces).
The procedure for inserting and removing the CLP can be found in the section "Replacing a
CLP (Page61)".
Description of the device
4.9Con󹪝gur
ation License PLUG
SCALANCE MUM853-1
32 Operating Instructions, 03/2023, C79000-G8976-C650-05