Omron NT21 User Manual

1-2SectionFunctions of the NT21, NT31/NT31C and NT631/NT631C
20
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 entry, 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 entry 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.
Alarm List/History
The alarm list/history function displays messages in list form, or graphics
(image/library data), in accordance with changes in bit memory table statuses.
For the alarm list, a series of bit memory table entries are monitored, and mes-
sages (contained in the character string memory table) set for bit memory table
entries that come ON are displayed.
For the alarm history, bit memory table entries for which the history property is
set are continually monitored, and the time when they come ON and number of
times they come ON are recorded and displayed together with the message
(character string) set for the bit memory table entry.
The NT21, NT31/NT31C, and NT631/NT631C allow selection of the display or-
der for the newest record first or oldest record first by memory switch setting.
The alarm list function is used to determine which bits are ON at the present
time. The alarm history function is used to determine the times at which alarms
occurred in the past and how many times alarms have occurred. (Optional Bat-
tery required for NT21.)
• Alarm list
0
1
0
Bit
A000000
L001003
D010015
1(ON)
No.13
No.14
No.15
Message (character string table entry 32)
set for bit memory table entry 14
Character string table entry 32
Character string table entry 50
Image/library data 1002
HOST
Character string table entry 32
Image/library data 113C
Character string table entry 54
Image/library data 1125
Image/library
data 113C
When the message displayed is pressed, the image/library
data (113C) set for bit memory table entry 14 is displayed.

Omron NT21 Specifications

General

Brand	Omron
Model	NT21
Category	Touch terminals
Language	English