Omron NT620C, Operation Manual

Page: 153 / 337

4-5 Section Graphs
141
(3) When the absolute value of the % value is above 1000%
The bar graph will be displayed the same as (2) above.
The % value is displayed as follows according to the sign display setting:
Sign display “No”:
:::
%
Sign display “Yes”:
::::
%
•
Color display (NT620C only)
Color of a graph to be displayed can be specified. For background of a graph,
screen background color is displayed.
Graph frame (in case of a graph frame): 8 colors
+ direction display area: 8 colors
– direction display area: 8 colors
4-5-2 Trend Graph Setting
A trend graph displays the displacement with the lapse of time as a locus while
monitoring (sampling) the Numeral Memory Table value periodically. As time
goes by, the displacement varies as shown below.
<Example of normal type that increases rightward with a sign displayed>
For a trend graph, a single graph frame can be shown in a screen and a maxi-
mum of 50 graphs can be registered in the graph frame.
•
Reference table
This is the same as for bar graphs. See page 138.
Although it is possible to select either “direct” or “indirect” as the reference
method with the support tool, only the “direct” setting is meaningful when using
an NT620S/NT620C.
It is not possible to use hexadecimal values for trend graphs. If hexadecimal
values are specified in numeral memory tables referenced to obtain graph val-
ues, the graph will not be displayed. The letter “F” may be used to indicate neg-
ative values, but make sure that no hexadecimal values are written.
Trend Graph Attributes When using an NT620S/NT620C, the following attributes can be used when dis-
playing trend graphs.
•
Graph frame
This attribute specifies a rectangular area used to display a graph.
This area can occupy the following range:
NT620S: Max. 640 dots horizontally x 400 dots vertically
NT620C: Max. 640 dots horizontally x 480 dots vertically
The following setting can be performed for a graph frame.
- Frame display
With the “Frame Display” specified, 1-dot width frame line is displayed out-
side of the frame area. When using an NT620C, color of a frame line can be
selected out of eight colors.
- Background color in a frame: 8 colors (NT620C only)