Omron Programmable Terminals NT631C - Manual (Page 32)

15
Functions of the NT631/NT631C Section 1-2
Thumbwheel Switches 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 notification sent to the host.
Thumbwheel switch inputs can be enabled and disabled from the host when
an interlock bit has been allocated.
Graphs These are graphics whose display changes in accordance with the numeric
values 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.
Analogue meter:
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.
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.
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.
60%
60%
100%
−
100%
0%
Example showing a series of
11 numeral memory table
values (with a check mark
set for the display sign)