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Section 3-9
4-9-4 Display History
The display history function records the number of times that screens for which a
display history attribute has been set by the support tool are displayed, and dis-
plays the accumulated occurrence data either in order of occurrence or order of
frequency format.
Recording the Display History
The display history is recorded using the procedure given below.
Operation 1. Setting the screen attribute
When creating a screen using the support tool, set the display history record-
ing attribute for the screen if its display history should be recorded. When set-
ting the attribute, register a message no longer than 24 characters expressing
the contents of the screen.
A display history is recorded only for screens for which the display history re-
cording attribute is set.
2. Initializing the display history data memory
Before starting to record the display history, initialize (clear) the display history
data memory either by sending the display history data memory initialization
command from the Host (page 76) or by selecting the “Screen Data Memory”
initialization menu in the Maintenance Mode (page 72).
If the memory becomes full of history data, the history data for new occur-
rences cannot be recorded.
3. Executing the display history recording
If a screen for which the display history recording attribute has been set is dis-
played during operation, the display history data is recorded in the NT600S.
In the display history, the following data relating to the displayed screen is stored
in the memory.
- Screen number
- Message expressing the contents of the screen
Each time a screen number for which the display history recording attribute has
been set is specified by the PC/Host, the data indicated above is recorded in the
corresponding data area.
The data recording capacity is 1023 screens if the display history is recorded inthe
order of occurrence and 255 times per screen if it is recorded in the order of fre-
quency. Note that only the screen number and the message are recorded.
The recorded data is retained even when the power is turned off since it is backed
up by battery. However, if no battery is installed, the recorded data islost whenthe
power is turned off.