Rockwell Automation FactoryTalk Historian SE ProcessBook 3.2 User Guide - Manual (Page 341)

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System Administrator Notes
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Trend Definition Section
Trend initializations. Possible entries:
Autoscale  1=yes
 0=no
Value/Description/Plot
Title/Grids/Scale Inside
Axis/Tag Name/Eng
Units/Correlation
Coefficient/Linear
Correlation/Connecting
Lines
 1=enable feature
 0=disable feature
Background Null  1=sets to have no background color.

0=have background color specified under Elements.
Start Time/End Time Default start and end time range (must be a valid FactoryTalk
Historian string)
UpdateTimeRange Maximum time period, in seconds, to support updates. The
default is 604,800 seconds, equal to 7 days. If the time range
is greater than this value, the trend does not update
automatically even when the end time is '*'. Note that the
maximum update range is different from the update rate,
which is the frequency with which the computer displays new
data from the server, typically every 5 seconds.
MarkerWarning ProcessBook has the option of showing a warning dialog box
whenever a trend has found too many marker values to
display them on the plot.
 1=enables this option (default).
 0=disables this option.
RequeryThresholdFactor Base the max values for each trace on a "factor" of the
interval.
RequeryHoldoffTimeout Minimum time for re-query since last requery in milliseconds.
Max Traces The maximum number of traces per trend.