Omron NT31C Reference Manual page 170

Graphs
The 100% value is at the top of the frame when the Direction is a lateral one and
the right of the frame when the Direction is a longitudinal one.
Up
Graph that is drawn from
bottom to top
Large number
Small number
Left
Graph that is drawn
from right to left
Large number Small number
Number of Vertices
The maximum number of vertices (numeral memory tables) that can be dis-
played in one broken line is 320 in NT31/NT31C PTs or 512 in NT631/NT631C
PTs, but since a minimum interval of 1 dot is actually required between memory
tables, the following restriction applies depending on the width (number of dots)
of the graph frame.
Width of graph frame (number of dots) y No. of Points
Interval Between Numeral Memory Tables
The display interval between memory tables can be set individually for each
memory table. Adjust the intervals as required.
When Even is set for the Interval Type, the intervals are arranged evenly so as to
make use of the entire width of graph area.
Example: Broken line graph where the interval changes
Method for Calculating The Percentage Value
The percentage value is calculated as follows, depending on whether it is larger
or smaller than the 0% value.
However, note that although each vertex of the broken line graph is displayed
based on this value, individual percentage values are not displayed.
• When displayed numeric value y 0%, and when no check mark is set for Dis-
play Sign:
Percentage value =
• When displayed numeric value < 0%:
Percentage value =
Down
Graph that is drawn from
top to bottom
Small number
100%
Large number
Right
Graph that is drawn
from left to right
100%
Small number
Displayed numeric value – [0%]
[100%] – [0%]
Displayed numeric value – [0%]
[0%] – [–100%]
Section 2-10
100%
100%
Large number
100
100
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