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6. PRECAUTIONS WHEN DESIGNING A SCREEN
MELSEC-A
(3)
Data display control after switching to the monitor screen
To display data (part drawings, numerical data, character-string data,
graphs, etc.) in accordance with the monitoring conditions (data collec-
tion trigger device, monitor device, etc.), display the monitor screen, and
then satisfy the monitoring conditions.
If the monitoring conditions have already been satisfied before display-
ing the monitor screen, this step can be ignored.
<Example>
When the monitoring conditions data collection trigger device is the
leading edge of a bit device:
•
Monitoring
conditions bit
_
device
Ignored
Treated as valid.
•
The number of the currently-displayed monitor screen is stored to the G-
controller module buffer (address 1).
Use the number of the currently-displayed monitor screen as well as the
screen switching signal (X15) and the trigger frequency signal (X16)
shown in (2) for the interlock when displaying data in accordance with
the monitoring conditions.
(See the second ladder block of the sample program in (2).)
6-19
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