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System Maintenance
Section 6-11
6-11-5 Displaying and Printing the Alarm History Record
The “alarm history record function” is a function that continually monitors, during
operation, the status of bits at the host designated in advance with a bit memory
table, and records the time when these bits come ON, and the number of times
they come ON.
The record data can be displayed, and printed out at a printer connected to the
NT31/NT31C by operation from the System Menu.
This section explains how to display and print out the alarm history record data
recorded in the NT31/NT31C.
Note that there are two display methods “sort by occurrence” (“ON” time order)
and “sort by frequency” (order of number of times the bits have come “ON”).
Reference - With the NT31/NT31C, the record data can also be displayed by registering an
“alarm history” display element on the screen.
- For details on the alarm history record function, refer to 7-15-2 “Alarm History
Record Function” (page 449).
- The order of display for “sort by occurrence” display (from oldest record or from
newest record) is set with the “Hist. Disp. Method” memory switch (page 201).
- The printing method and other information must be set in advance with the
“Printer Controller” (page 194) and “Print Method” (page 195) memory switches.
Display and print the alarm history record data by following the menu operation
from the System Menu shown below.
Select “Maintenance Mode”.
Select “Alarm History”.
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