Installation and commissioning
3.3 C-PLUG (configuration plug)
CP 343-1 ERPC
Manual, 03/2010, C79000-G8976-C239-02
19
● Chassis ground slider pushed in:
Chassis ground and reference ground connected (note: you can feel the slider lock into
position).
● Chassis ground slider pulled out:
No connection between chassis and reference ground.
When shipped: Slider pushed in
Use a screwdriver to set the slider.
Configuration
To set up the CP for communication services, read the instructions in section Configuration
(Page 14).
3.3 C-PLUG (configuration plug)
Exchangeable C-PLUG
The CP has a receptacle for a configuration plug (known as a C-PLUG) that is supplied as
standard with the device. This can store up to 32 MB of data in nonvolatile memory.
Area of application
The C-PLUG is an exchangeable medium for storing configuration and project engineering
data of the CP. This means that configuration data remains available if the CP is replaced. It
is possible to replace the module without a PG.
How memory is divided up and the data contained in the various areas is explained in
section Memory organization (Page 35).
NOTICE
Startup without C-PLUG
The full CP functions are available only when a C-PLUG is inserted.
If the C-PLUG is missing, the CP starts up but only diagnostic functions are available.
Recommendations for data storage
We recommend that you store the configuration data on the CPU, refer to the option "Save
configuration data on the CPU" in section Module replacement (Page 23).
If the STEP 7
configuration data is extensive, storage of the configuration data on the CP (on
the C-PLUG) is recommended in the following situations:
● The configuration memory on the CPU is inadequate.
● The delays due to the extent of the configuration data when starting up the module are
unacceptable.
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