Replacing The C-Plug - Siemens SCALANCE W788-1PRO Operating Instructions Manual

Connecting up

5.2 Replacing the C-PLUG

5.2 Replacing the C-PLUG
Procedure
Follow the steps below to replace the C-PLUG of a SCALANCE W788-xPRO/RR or W74x-
1PRO/RR:
Note
In terms of the C-PLUG, the WLAN devices work in two modes:
• Without C-PLUG
The device stores the configuration in internal memory. This mode is active when no C-
PLUG is inserted.
• With C-PLUG
The configuration stored on the C-PLUG is displayed over the user interfaces. In this
mode, the internal memory is neither read nor written. If changes are made to the
configuration, the device stores the configuration directly on the C-PLUG. This mode is
active when a C-PLUG is inserted. As soon as the device is started with a C-PLUG
inserted, the WLAN device starts up with the configuration data on the C-PLUG.
1. Turn off the power to the device.
2. Remove the old SCALANCE W788-xPRO/RR or W74x-1PRO/RR from its mounting and
open the sealing screw on the rear with a coin or broad screwdriver.
3. Remove the C-PLUG.
4. Open the sealing screw of the new device in the same way and insert the C-PLUG of the
old device.
5. Replace the sealing screws of both devices.
If a new C-PLUG is inserted in a SCALANCE W788-xPRO/RR or W74x-1PRO/RR, the
configuration stored locally on the device is saved to the C-PLUG. If an incorrect C-PLUG
(for example from another device or a damaged plug) is inserted, the device signals an error
with the red LED. The user then has the choice of either removing the C-PLUG again or
selecting the option to reformat the C-PLUG and use it.
Note
It is essential that the configuration on the C-PLUG was generated with a firmware version ≤
the firmware version on the destination device.
Example: A C-PLUG with version V3.0 cannot be used for a SCALANCE W78x with
firmware version V2.4.
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SCALANCE W788-xPRO/RR / W74x-1PRO/RR
Operating Instructions, 07/2014, A5E02280448-08