GE Industrial Solutions 6KCV301DGF - Manual (Page 21)

21 —————— Digital General Function Card ——————
6KCV301DGF
The user may need to do one of the following operations:
-
Read the parameter’s value.
- Change the parameter’s value.
- Read one or more information field(s) of the record associated with the parameter.
- Change one or more information field(s) of the record associated with the parameter.
If the user decides to carry out some modification on the parameter or on the record
that describes it, the new information will be stored in DBASE_RAM. With the
characteristics of the DBASE_RAM storage, all the modifications made by the user
will be lost at the first power-off of the DGF. To avoid this, the user must carry out
a storage operation of the DBASE_RAM. In other words the user must copy
DBASE_RAM into DBASE_FLASH. Below are some considerations concerning this
operation:
-
Not all the parameters and their associated fields that are contained into
DBASE_RAM are copied into the DBASE_FLASH but only those parameters in
which the attribute MEMO has been set in a suitable way.
- The writing into DBASE_FLASH is a slow operation that requires 2 or 3 seconds.
For this reason this operation can be executed only when the DGF is in IDLE
status.
- At power on , after the DBASE_ROM has been copied into the DBASE_RAM,
the DBASE_FLASH is analyzed. If it is OK, it will automatically execute a copy
of the DBASE_FLASH into the DBASE_RAM, retrieving the customization made
by the user.
To save: use HIBS, or drive keypads.
The fourth area where some data of DBASE is stored is DBASE_EEPROM. For
example, it is useful in the following conditions :
- DGF configuration has been performed while drive and the DGF are working.
The Drive and DGF cannot be stopped for the couple of seconds that it requires to
make a copy of the DBASE_RAM into the DBASE_FLASH.
- DGF configuration has been performed while the drive and DGF are working. If,
for unpredictable reasons, the DGF must be powered off, we do not want to lose
the configuration parameters.
Under either of these conditions ( or any other where the value of a parameter must be
saved immediately after its modification, even if the DGF is in RUN status), the
DBASE_EEPROM is available. This storage retentive area allows the storage of the
parameter’s value, but not its attributes, when the DGF is in RUN status.
So the initialization of the DBASE of the DGF can be summarized in the following
schema:
1) Power on or reset of the DGF
2) The DBASE_ROM is copied into DBASE_RAM. All the parameters and
respective records have their default values.
3) The integrity of the DBASE_FLASH is checked. If satisfactory: