Siemens SCALANCE XRH-300

4.9.2 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 CLP with no data (default setting) is plugged into a device, the device
automatically saves its con󹪝guration data on the CLP during the startup phase. After that,
it behaves like a CLP with data.
– If a CLP with data is plugged into a device, the device automatically adopts the
con󹪝guration of the CLP during the startup phase.
During operation:
– During 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
Only 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 pulling and plugging the PLUG can be found in the section "Replacing a CLP
(Page 74)".
Description of the device
4.9 Con󹪝guration License PLUG
SCALANCE XRH-300/XRM-300
38 Equipment Manual, 10/2022, C79000-G8976-C546-01