Meriam 4150X ATEX I.S. Certified HART Communicator - Manual (Page 26)

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DOF Memory Maintenance
DOF flash memory will become fragmented after many DOF download sessions to add new or update
existing DOFs. Fragmentation reduces the total number of DOFs that can be saved in memory. 560 DOFs
is the nominal capacity of the flash memory. When fragmentation becomes extreme, the 4150 / 4150X
will not accept additional DOF downloads. Periodic DOF memory maintenance will be needed to
optimize DOF memory.
The Offline screen indicates the number of DOF files stored in memory
and the percentage of free memory available for additional files. 401
DOFs ideally use about 72% of the available memory, so 28% of DOF
memory should be free... The example at right indicates that only 20% of
DOF memory is free. This indicates fragmentation.
To optimize DOF flash memory, it is necessary to delete all DOFs and
then reload them all in one session. Connect the 4150 / 4150X to a host
PC that has DPC Manager installed (see the DPC Manager Utility
section of this manual for more information). Launch DPC Manager and
select the “Manage DPC Device Driver and Firmware Updates” option.
Go to the Tool Bar and click on “Settings”, then click on the “Advanced”
option. The following screen will appear.
Under “Update DOFs on DPC” section on left
side, click on the “Auto” button. An Auto
Install dialog box will appear.
Select the “Yes” response to the “DOF
Update Options? question to erase all
existing DOFs and re-load DOFs from the
default DOF directory.
401 DOFs will take approximately 112
minutes to load.
Offline #
Utilities
1 List/Show DOFs
2 List/Edit Configs
3 Create Configs
4 Delete All Configs
DOFs: 401 Free: 20%
Configs: 3 Free: 99%
Up Down Select Back
HART Offline Menu Screen