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3.
AD57G MONITORING FUNCTIONS
MELSEC-A
3.5.2 Displaying a polygonal line graph (polygonal line graph display)
[Function]
This function is used to collect several values stored in word devices or
special-function module buffer memory, displaying a polygonal line graph.
The polygonal line graph is displayed as shown below:
(1) A single graph can contain up to eight polygonal lines.
And, up to 100 items of data can be included in each polygonal line.
. . . . .
. . , . .
. . . . .
. . , . .
20th point
(max.)
then two polygonal lines
re displayed
(2)
Calculation of graph
The calculation can be made using data upperllower limits set in the
polygonal line setting and number of Y axis dots in the graph display
area.
(The value O f (data upper limit)
-
(data lower limit) is considered as
100%, values stored in monitor devices are handled so that the cor-
responding points on the screen connect using a specified line (line color
and line type).)
[Monitor screen creation]
The following gives the settings required to use the "displaying a polygonal
line graph" function:
(1) Graphic data set by using the GED
Creating such canvas screens as graph display frame, scale, units, etc.
is necessary.
Create a vertical or horizontal mesh in the graph when necessary.
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