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5. MONITOR FUNCTIONS AND THEIR USE
MELSEC-A
POINTSI
(1) When the GEDE canvas screen creation function makes a graph
display frame, the AD57GPE must create a graph sprite frame to
percent a graph from being displayed on the display frame during
monitoring.
Example:
In the case of a trend graph:
Display frame
,---------------------,
i>--
No overlapping
:
~,
- - -
'here
I
,
,
,
,
,
,
,
,
Graph sprite frame
Graph sprite frame displayed when the monitoring condition is set.
-------------------_!--------------------
,~,
---
Upper limit
r
Shows the
size of the
value.
(2) In some cases, upper and lower limits should be set in the monitor-
ing condition setting. Such a setting is necessary for the G-control-
ler to find the height of a graph in the graph display range (graph
sprite frame) as shown beiow:
1) Upper limit
Standard value for finding the maximum height (100% state) of a
graph. Any value greater than the upper limit is handled as the
upper limit in the graph display.
2) Lower limit
Standard value for finding the minimum height (0% state) of a
graph. Any value less than the lower limit is handled as the lower
limit in the graph display.
When a graph is set, the graph sprite frame shows the size of the
value. The height is the distance from the lower limit to the upper
limit.
Example:
•
•
.
r
Monitor screen graph drawn
by
the user.
l -
- .
i_--Lower limit
1
I
Sections 5.5.1 to 5.5.6 give graph display details.
I
(3) Section 5.6 gives details on doing a level display of any desired
range using values stored in a word device of buffer.
5-53
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