Micromod Micro-PWC: 53PW6000 MicroPWC Configuration Guide - Manual (Page 278)

Micro-PWC CONFIGURATION GUIDE
258 Trends
Segment The horizontal axis of the trend graph is divided into five segments, each of
which is denoted by a long tick mark and a time and date stamp.
Segment Size The actual segment size is determined by two parameters: Seconds and
Points. The Seconds parameter is used to assign the number of seconds in a
segment. By default, this parameter is set to 60 seconds. The Points
parameter determines the maximum number of trend points which can be
plotted in a segment. By default, a maximum of 60 points can be plotted per
segment. To position points on the trend graph, the Micro-PWC uses an
internal algorithm which divides the number of seconds in the segment by the
number of points in the segment, yielding the number of time intervals in the
segment. The default settings of 60 points and 60 seconds per segment thus
yield the equivalent of a 1:1 compression ratio.
Trace A trace is a record of the collected data for an Historical Database point,
presented in visual form on a trend display. Up to eight traces can be
configured on each Trend Display, and each trace is displayed in a different
color.
Trace Default State The Trace Default State is used to determine the default condition of the trace.
A trace can be visible (ON) or invisible (OFF) by default, whenever the trend
display is called up.
Trend Trace Limits Trend Trace Limits are the limits defined for each individual trend trace. They
replace the default Scale Bar Limits when the colored button associated with
the trend trace is clicked.
Trend Title The Title parameter is used to configure a trend display title of up to 48
characters in length. Once configured, the trend title appears at the top of the
trend display. To configure this item, click the entry box labelled Title and enter
the desired alphanumeric text string.
Trend Type The Type parameter is used to determine which database (Historical,
Archival) will be used to supply the data for the trend.