Omron Programmable Terminals NT631, Operation Manuals

Page: 534 / 692

527
Using the Alarm List/History Function
Section 8-8
[Operation]
(1) Initialize the recorded alarm history record data as needed.
To initialize the alarm history record data using System Menu operation, se-
lect “Alarm History” on the “MEMORY INIT. MENU” screen.
To initialize the alarm history record data by operation at the PT status control
area, change the status of bit 1 in the 4th word (word n + 3) from the beginning
of the PT status control area to “1” (ON).
After initializing the alarm history record data by operation at the PT status
control area, return the status of bit 1 to “0” (OFF).
(2) Display the screen where the alarm list/history is registered.
In the case of an alarm history, the recorded data is displayed on the screen.
In the case of an alarm list, the content of the set character string memory
table is displayed as a message if the status of the bit in the host to be moni-
tored changes to “1” (ON).
Dedicated touch switches are provided for the alarm list/history. For the pro-
cedure for using these touch switches, refer to “How to use the touch switches
of the alarm list/history” (page 528).
Contents of character string memory table set
for the bit memory table whose status has
changed to “1” (ON).
If an alarm list with multiple lines is
created, alarms are displayed in
ascending order of bit memory table
numbers.
If the bit memory tables are set in
ascending order of priority, the display
will also be arranged in accordance
with the order of priority.
PROCESS 3 STOPPED
WATER TANK OVERHEATING
(3) Since the message area is a touch switch, pressing the message causes the
set image/library data to be displayed. At the same time, the pressed mes-
sage is displayed in the ON color.
Image/library data corresponding to the first alarm message
PROCESS 3 STOPPED
WATER TANK OVERHEATING
FAULT
The alarm list is composed of
touch switches. When a displayed
alarm message is pressed, the
corresponding image/library data
is displayed. The pressed alarm
message is displayed in ON color.
Process 3 stopped by fault.
Check DM2500.
(4) If another message is pressed, when more than one message is displayed,
the newly pressed message is displayed in reverse video and the correspond-
ing image/library data is displayed.
Image/library data corresponding to the second alarm message
PROCESS 3 STOPPED
WATER TANK OVERHEATING
It is also possible to set
correspondence between bit memory
tables and screen numbers. Here, if
the second alarm message is
pressed again, the corresponding
screen will be displayed.
Check the thermostat!
URGENT
(5) When the reverse video message is pressed, the screen changes to the
screen with the set screen number.