Honeywell Centraline FALCON User Manual page 227

USER GUIDE
NOTE: The internal flash memory (2 MB) is capable of storing a maximum
of 64,000 trend records distributed among a max. of 125 trend log
objects. Each trend record allocates 30 bytes of memory. Based upon
the internal flash storage selection, the default value for the max.
buffer size is 2880 records, distributed among 24 trend log objects
according to the calculation:
2 MB / 30 / 2880 = 24
Based on the preceding calculation, external flash cards with
capacities higher than 2 MB enable you to extend the no. of trend
log objects and trend records to be saved.
IMPORTANT
Irrespective of the buffer size and the storage mode selected (internal
or external flash, step d), it is recommended not to increase the default
buffer size. Increasing the value above 2880 results in decreased
performance when viewing and browsing trend record pages and
creates additional effort when manually downloading trend records into
a csv. file on the PC (step 21).
The maximum no. of storable trend records per download is 1550
independent of the no. of trend log objects selected. To reduce the no.
of manual downloads necessary for the total download of trend records
exceeding the max. no of 1550, the date range can be set accordingly
(step 19).
pp.
qq. Under Set Buffer Type to, select the buffer type under:
• Ringbuffer
The oldest record will be overwritten by the latest record when the buffer
size is exceeded.
• Stop when full
Trending is stopped when the buffer size is exceeded.
rr. Click the OK button.
ss. Under Set Storage to, select the buffer location under (trend logging must
be disabled):
• Compact Flash
The trend results are saved on the "external" flash card. The compact flash
is portable and allows trending of additional trend log objects with more trend
records.
• Internal Flash
The trend results are saved on the internal flash.
See previous Buffer Size Note.
tt. Click the OK button.
12. To save settings, click the CLOSE button.
NOTE: You can only change settings of those trend options, of which write
access rights are equal to or less than your access level.
RESULT: The Points in Trend tab redisplays.
13. To view/change trend details of a single datapoint, click on its Details entry in
the last column.
RESULT: The Trend Details dialog box displays.
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FALCON
EN2Z-0962GE51 R0715