Omron NT631 Series Reference Manual page 174

Graphs
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S If a small value is set for Interval Type, even if broken line, 1-dot chain line, or
Reference:
2-dot chain line is specified the line will appear to be a solid line.
S In the case of a standard trend graph which determines the 100%, 0% and
–100% values according to the Table Entry settings, if the contents of the refer-
enced numeral memory tables change, the graph becomes discontinuous.
Example:
100%
0%
Resulting Display
When No Check Mark Is Set for display Sign
Position
(Top left corner of the rectangular area including
the graph, percentage display, and touch switches)
Latest data
Latest data
Size
(Y direction)
When a Check Mark Is Set for Display Sign
In this case, the center of the graph is always the 0% position, regardless of the
settings made for 100%, 0%, and –100%.
Size
(Y direction)
Contents of the numeral
memory table referenced
to find the 100% value
changed part way
through graph display
Frame color
80%
–120%
Size (X direction)
Position
(Top left corner of the rectangular area including
the graph, percentage display, and touch switches)
Frame color
Size (X direction)
Latest data –50%
Latest data 80%
Section 2-10
100% position
Display color for the + range
Line (color, style)
Line (color, style)
0% position
100% position
Display color of + range
Line (color, type)
0% position
Line (color, type)
Display color of – range
–100% position
165