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5. MONITOR FUNCTIONS AND THEIR USE
- - - - - - - - - - -
MELSEC-A
5.5.2
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.
, st
data
item
f
+Sth
point
1st point
20th point
(2)
Calculation of graph
100th data .
item (max.) :
100th point
(max.)
When two polygonal lines
are displayed
•
The calculation can be made using data upper/lower limits set in the
polygonal line setting and number of Y axis dots in the graph display
area.
(The value of (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 GEDE
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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