Alarm List, Alarm History - Omron NT21 Reference Manual

Alarm List, Alarm History

2-11 Alarm List, Alarm History

Function Outline
Reference: If the remaining capacity of the battery is insufficient, the alarm history data is all
182
Alarm List
The PT can monitor the status of bits at the connected host designated in bit
memory table entries and, when the status of a particular bit changes to 1 (ON),
display the corresponding message (from a character string memory table
entry) or image/library data. The element used to execute this function is called
an alarm list.
Message set for bit memory table entry 14
(character string memory table entry 32)
Character string
memory table entry 32
Image/library
data 113C
When the message being displayed is pressed, the image/library
data (113C) set for bit memory table entry 14 is displayed.
Alarm History
The PT can continually monitor bits at the host designated in bit memory table
entries, record the time when their status changes to 1 (ON), and the number of
times they come ON, and display this information together with the correspond-
ing message (from a character string memory table entry) for the bit. The ele-
ment used to execute this function is called an alarm history.
The alarm history record data is backed up by the built-in battery of the PT and is
therefore retained even when the power to the PT is turned OFF or the PT is re-
set. (An optional Battery is required for the NT21.)
Message set for bit memory table entry 24
(character string memory table entry 13)
Character string
memory table entry 13
Character string
memory table entry 12
Image/library
data 102B
When the message being displayed is pressed, the image/library
data set for bit memory table entry 13 (102B) is displayed.
cleared when the power to the PT is turned OFF or the PT is reset.
When low battery voltage is detected, replace the battery immediately. Refer to
section 7 of the Setup Manual for details on replacing the battery.
Character string memory table entry 50
Image/library data 1002
Character string memory table entry 32
Image/library data 113C
Character string memory table entry 54
Image/library data 1125
Character string memory table entry 11
Image/library data 005F
Character string memory table entry 12
Image/library data 102A
Character string memory table entry 13
Image/library data 102B
Section 2-11
Bit Host
No. 13
0 A000000
1 (ON)
1 L001003
No. 14
0 D010015
No. 15
Record data
Bit memory table 24
No. 22
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Bit memory table 23
No. 23
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No. 24