Siemens SIMATIC NET SCALANCE W1788 Series Operating Instructions Manual page 39

Function
Devices with a CLP slot support the following operating modes:
• Without CLP
The device saves the configuration 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
– When a CLP with data is plugged into a device, the device automatically adopts
– If the CLP contains a license, additional functions are also enabled.
During operation:
– During operation, changes to the configuration are saved on the CLP and in the
– The configuration data of the device is stored in a secured memory area of the
– The device checks whether a CLP is inserted at one second intervals. If the device
– The device signals deviations from normal operation of the CLP (e.g., incompatible
The procedure for inserting and removing the CLP can be found in the section
"Replacing a CLP (Page 72)".
SCALANCE W1788-x / W1748-1
Operating Instructions, 03/2022, C79000-G8976-C484-05
automatically backs up the configuration data on the CLP during startup. After
that, it behaves like a CLP with data.
the configuration of the CLP 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.
Note
If the device was configured 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.
internal memory.
CLP. This secured memory area can only be accessed via the authentication of the
Siemens 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.
data, incorrect operation or malfunctions) via the existing diagnostics mechanisms
(e.g., LEDs or user interfaces).
Description of the device
4.7 Configuration License PLUG
39