Omron Programmable Terminals NT631C - Manual (Page 192)

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Various System Settings Section 6-9
6-9-9 Setting the History Display Method
The NT631/NT631C features the display history record function, which
records the time at which screens are displayed during operation and the
number of times they are displayed, and the alarm history record function,
which continually monitors bit statuses at the host and records the time when
bits come ON and the number of times they come ON.
The Hist. Disp. Method setting determines whether — when these record data
are displayed in sort by occurrence — the records are displayed in a progres-
sion from newest to oldest or from oldest to newest.
• From Old Data:
The records are displayed in sequence from the oldest to newest.
• From New Data:
The records are displayed in sequence from the newest to oldest.
The default (factory) setting is From New Data.
Reference: • When the voltage of the NT631/NT631C’s built-in battery becomes low,
the history record contents cannot be retained.
• For details on the display history record function and the alarm history
record function, refer to 2-15-1 Display History Record Function and 2-15-
2 Alarm History Record Function in the Reference Manual.