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3-9
Section
System Maintenance
92
3-9
System Maintenance
The NT620S/620C has self-maintenance functions, such as display history re-
cording, I/O check and PT setting display. These functions are accessible mainly
from the Maintenance Mode.
3-9-1 Using the Display History Recording Function
The display history recording function is used to record the display sequence and
frequency of screens during operation. The data recorded can be displayed and
confirmed on the system screen.
Recording Display History
Display history is recorded in the following procedure:
Setting screen attributes
Initializing memory for display history recording
Recording display history
To create a screen, of which display history will be recorded, on the support tool,
set display history recording attributes to it. Register a message describing dis-
play history with not more than 24 characters.
The display history can be recorded if the display history recording attributes for
the screen have been set. For further information, refer to NT-series Support Tool
Operation Manual (V028-E1-1).
Prior to recording, initialize the memory for display history recording
(refer to page 67).
When the screen with display history recording attributes requested from the PC
appears during operation, the display history will be recorded in the system.
Display History Recording Format
Display history includes the following items related to the screen displayed:
Screen number
Date and time of display
Message outlining screen data
Maximum Number of Screens to be Recorded
When recording in order of occurrence, up to 1023 screens can be recorded
regardless of the screen number. When recording in order of frequency, up to
1023 screens can be recorded, and each screen can be recorded up to 255
times.
Since the data recorded is retained by the battery, it will not be lost even if the
power to the system is turned off.
Confirming Screen Data Recorded
There are two ways to confirm screen data recorded: by the maintenance mode,
and by displaying the screen by the display history recording function during op-
eration.
Recorded data can be displayed in order of occurrence or frequency.
In order of “occurrence”
Recorded data is displayed in order of occurrence.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
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