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2-11
Section
Alarm List, Alarm History
173
2-11 Alarm List, Alarm History
Function Outline
Alarm List
The PT can monitor the status of bits at the connected host designated in bit
memory tables and, when the status of a particular bit changes to 1 (ON), display
the corresponding message (from a character string memory table) or image/li-
brary data. The element used to execute this function is called an alarm list.
Character string
memory table No. 32
Image/library
data 113C
Character string memory table No. 50
Image/library data 1002
Character string memory table No. 32
Image/library data 113C
Character string memory table No. 54
Image/library data 1125
Bit
No. 13
←
1 (ON)
No. 14
No. 15
0 A000000
1 L001003
0 D010015
Host
Message set for bit memory table No. 14
(character string memory table No. 32)
When the message being displayed is pressed, the image/library
data (113C) set for bit memory table No. 14 is displayed.
Alarm History
The PT can continually monitor bits at the host designated in bit memory tables,
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 corresponding
message (from a character string memory table) for the bit. The element 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.
Image/library
data 102B
Character string memory table No. 11
Image/library data 005F
Character string memory table No. 12
Image/library data 102A
Character string memory table No. 13
Image/library data 102B
No. 22
Bit memory table 24
97/12/04 11:19:20
Bit memory table 23
97/12/04 11:25:12
No. 23
No. 24
Message set for bit memory table No. 24
(character string memory table No. 13)
Character string
memory table No. 13
Character string
memory table No. 12
When the message being displayed is pressed, the image/library
data set for bit memory table No. 13 (102B) is displayed.
Record data
Reference:
If the remaining capacity of the battery is insufficient, the alarm history data is all
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.
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Summary of Contents for NT21 Series
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