Carrier TruVu VVTBP-E2 Installation And Startup Manual page 62

Adjusting the TV-VVTBP-E2 driver properties
Field
Sample every _:_:_ (hh:mm:ss)
Sample on COV
(change of value)
Max samples
Stop When Full
Enable trend log at specific
times only
Enable Trend Historian
Store Trends Now
Write to historian every __ trend
samples
Trend samples accumulated
since last notification
Last Record Written to Historian
Keep historical trends for __
days
TruVu™ VVTBP-E2
Installation and Start-up Guide
Notes
(Recommended method) To record the value at a regular time interval, enter
hh:mm:ss in this field.
To record the value only when the value changes by at least the amount of
the COV Increment, set the Sample every field to 0:00:00 and enter a value
in the COV Increment field.
Network Statistic trends have a non-configurable maximum trend log buffer
size of 1440.
NOTE Trending consumes memory in the controller. Click Reset to delete all
samples currently stored in the controller.
Check this field to stop trend sampling when the maximum number of
samples is reached.
Collects trend data for the specific period of time you define in the time and
date fields.
Archives trend data to the system database.
Writes all trend data in the controller to the system database without having
to enable trend historian.
Writes all trend data in the controller to the system database each time the
controller collects the number of samples that you enter in this field. This
number must be greater than zero and less than the number entered in the
Max samples field. The number of trends specified must be accumulated at
least once before the historical trends can be viewed.
NOTE Any trends not stored in the historian will be lost if the controller loses
power.
Shows the number of samples stored in the controller since data was last
written to the database.
Shows the number of trend samples that were last written to the database.
This is based on the date that the sample was read. Select the first option to
use the system default that is defined on the System Options > System
Settings > General tab. Select the second option to set a value for this trend
only.
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