Initializing Alarm History Record Data - Omron NT21 - SETUP MANUAL 10-2001 Setup Manual

Memory Initialization

6-4-3 Initializing Alarm History Record Data

Initialize the display history record data by following the menu operations from
the Maintenance Mode Menu as shown below.
If No is selected, the NT21 returns to the MEMORY 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.
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.
Select Memory Init..
Select Display History.
Select Yes.
The display history record data is initialized.
During initialization, the message Initializing
is displayed.
Section 6-4
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