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3. AD57G MONITORING FUNCTIONS
MELSEC-A
3.5.1.3
Displaying an overwrite-type trend graph
[Function]
This function repeats the graph display within the same frame on the monitor
I
screen.
A trend graph is displayed as shown below:
(1) AD57G operation
Displaying a monitor screen in which this type of trend graph is set starts
data collection and the graph display using the data collection trigger as
shown below:
(a) After the sampling start and sampling interval conditions are satis-
fied, data collection and the graph display start.
(b) The graph display is executed according to the display direction.
The original point is located on either the right or left side of the graph
sprite frame. Every time data collection is executed at the sampling
interval, the data is extended by one point.
(c) When the data collection and display reach the opposite side of the
graph sprite frame, data collection and graph display are interrupted.
(d) After interrupting the data collection and graph display, as was done
in (a) above, satisfying the sampling start and sampling interval
conditions resumes and continues data collection and the graph
display until the completion conditions are satisfied.
(e) When the trend graph is redisplayed after the sampling completion
conditions are satisfied, satisfy the graph deletion conditions. (Con-
tents displayed in the graph sprite frame are deleted.)
After the graph deletion conditions have been satisfied, data collec-
tion and the graph display are resumed by satisfying the sampling
conditions.
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Sampling (start and interval)
Sampling (start and interval)
I
(n:
Spssified
by
the
user1
The triggers become valid in the following cases:
Sampling start
: Before starting data collection and the graph display.
After data
i s
collected for an entire graph and
displayed.
After data deletion is executed following the
sampling completion.
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