6-4SectionMemory Initialization
113
Initialize
the display
history record data by following the menu operations from
the Maintenance Mode Menu as shown below.
Select Memory Init..
Select Display History.
Select Y
es.
The
display history record data is initialized.
During
initialization, the message Initializing
is displayed.
If
No is selected, the NT21 returns to the MEMOR
Y INIT
. MENU screen without
initializing the display history record data.
On
completion of display history record
data initialization, the message Finished
is displayed and the NT21 returns to the MEMORY INIT. MENU screen.
6-4-3 Initializing Alarm History Record Data
The
alarm history record function continually
checks the status of host bits that
have
been designated
in advance in the bit memory table, and records the time
when
any of the bits is set to 1 (comes ON), and the number of times that each bit
comes ON.
The maximum number of records is 256 for sort by occurrence (order of error
occurrence) and 255 for sort by frequency (order of the number of times each
error has occurred).
Use
the alarm history record initialization function to reset the alarm history re
-
cord
data to 0, for example when the screen data has been changed, etc. Also, if
Alarm History (Use Ring Buffer) under History Setting in the PT Environment
Settings – System Settings has not been checked, no more records will be
stored
after the maximum number of
records has been kept, and therefore the
records must be periodically initialized. If Alarm History (Use Ring Buffer) is
checked,
when
the maximum number of records is reached the oldest record is
deleted and the newest data is recorded.
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