Omron Programmable Terminals NT31 NT31C - Manual (Page 26)

Section
14
Numeric values can be input by incrementing or decrementing each digit with
the corresponding touch switch (+, –). The input numeric values can also be
stored in a numeral memory table and notified to the host.
Thumbwheel switch inputs can be enabled and disabled from the host when an
interlock bit has been allocated.
These are graphics whose display changes in accordance with the numeric val-
ues stored in numeral memory tables. There are the following four types.
Bar Graphs
Bar graphs display the present value in a numeral memory table converted to a
percentage within the range –100% to +100% of a preset value.
60%
Analog Meters
Analogue meters display, using a quarter, half, or full circle shape, the present
value in a numeral memory table converted to a percentage within the range
–100% to +100% of the preset value. Users can choose from moving pointer
type and filling area type displays. Users can also add graduation to the graph.
60%
Broken Line Graphs
Broken line graphs display, in an easy-to-read form, a sequence of numeral
memory table values converted to a percentage within the range –100% to
+100% of a preset value.
100%
– 100%
0%
Example showing a series of 11
numeral memory table values
(with a check mark set for the
display sign)
Trend Graphs
Trend graphs display chronological changes in the value in a numeral memory
table, converting the value to a percentage within the range –100% to +100% of
a preset value. The trend graph shifts position with the passage of time.
Past data can also be recorded, and the numeral memory table can be read
(sampled) even while the trend graph is not being displayed.
The user can choose to stop sampling, restart sampling, or display past data, by
pressing touch switches.
Thumbwheel Switches
Graphs