Alarm History Record Function - Omron NT631 Series Reference Manual

Special Functions

2-16-2 Alarm History Record Function

Procedure for Using the
Alarm History Record
Function
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determined by memory switch setting at the PT. The following example shows
an NT31/NT31C PT:
Order of Frequency
The screen records are displayed in the order of frequency of display (number of
times displayed) of the corresponding screens. The following example shows an
NT31/NT31C PT:
Checking The Record in The Maintenance Mode
Select the Maintenance mode from the System Menu and display the history re-
cord.
For details on the System Menu operation, refer to section 6 of the Setup Manu -
al .
Checking The Record During Operation
The display history record can be checked during operation by displaying either
of the following screens.
Screen No. 9001: Occurrence history screen
Screen No. 9002: Frequency history screen
Reference: Screen numbers 9001 and 9002 are reserved for displaying the display history
record. They cannot be used for other applications.
The alarm history record function continually monitors the status of host bits set
in advance, and records the times at which the statuses of these bits change to 1
(ON). The setting for monitoring the bits can be made at bit memory table.
The recorded data can be displayed and checked even during operation, from
the System Menu.
The procedure for using the alarm history function is as follows.
1, 2, 3... 1. [Setting the bit memory table]
At the Support Tool, allocate host bits to a bit memory table and set History
as the function of the bit memory table. At this time, it is possible to specify
Section 2-16
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