Configures a group of trend or fast graphs.

 The PlotGroup object brings together a number of fast or
 trend graphs into a group of graphs by the
 corresponding data storage objects
 being pointed out by YObjectName.
 In Xtt up to 20 graphs from storage objects can be displayed,
 and in the GMS operators environment, up to 4 can be displayed.
 The graphs brought together, in reality the measured quantities,
 may be sampled by different frequencies.
 The graphs are always plotted as a function of time.
 Suppose that the fastest sampled measured quantity in a
 group is being sampled by the frequency BaseFrequency.
 The width of the "time window" at the display is then
 NumPoints * BaseFrequency.
 Between samples in a slowly sampled graph interpolation
 takes place.

 The buttons 'Trend' and 'Fast' in the operator
 environment display both lists of those PlotGroup objects
 ( or graphs) that are available on the node independent
 of the user. Which list a specific PlotGroup object
 belongs to depends of Trend.

 The users 'Host' and 'Process', according to figure below, will
 get lists with the same appearance but by grouping the PlotGroup
 objects in separate hierarchies is it possible to the designer to
 indicate which 'graphs' concern 'Host' respectively 'Process'

 Configuration of PlotGroup Objects

 Optional text.

 Specifies whether the group of graphs consists of fast
 or trend graphs. FALSE means fast graphs and TRUE means
 trend graphs.

 Specifies the names of up to four DsTrend or DsFast
 objects. Which graphs to be
 plotted may not be changed from the more info form of
 the PlotGroup object.

 Specify the engineering units of the plotted
 quantities. The units are not changeable from the more
 info form of the PlotGroup object.

 Specifies, for respective graph the upper and the lower
 display limit of the vertical axis.

 Specifies, for respective vertical axis, the value of
 major and minor scale division; YTickminor <
 YTickmajor.

 Not used.

 Specifies the number of samples the graphs are to be
 rolled when updating.

 Specifies the major and the minor scale division for
 the horizontal axis; XTickminor < XTickmajor. The value
 of XTickmajor also determines the grid size.

 Determines the width of the time window.

 0 < NumPoints * number of elements in the data storage
 object's DataBuffer. Is adjusted automatically at
 selection of a new measured quantity from the object
 display of the PlotGroup.

 Curve window layout.

 Curve window time range.

 Button text in operator window.