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4.
PRECAUTIONS WHEN DESIGNING A SCREEN
MELSEC-A
(3) When monitoring a PC CPU of another station on MELSECNET, use link
relays (B) and link registers (W) used for the data link.
Devices (X, Y, M, and D) of another station's PC CPU can be monitored,
but, monitoring is delayed due to the transmission time of the data link.
It takes about one second t o read the device memory of a local station
from the AD57G installed in the master station of MELSECNET.
(When the scan time of the master station is 100 msec and the link
refresh time of the master station is 10 msec)
4.10.2
Select a figure with a fast display speed
The display speed can be increased by changing the size and shape of
monitoring graphic figure.
The following explains a method for improving the display speed concerning
figures which influences display speed.
(1)
Circle graph
Reduce a circle graph.
The display time is proportional to the display area.
For example, a radius is reduced 30 percent. Then, the display time of
a circle graph is shortened to 112.
(2)
Trend graph (scroll and batch)
Decrease the number of graph lines and the number (number of points
to be displayed on a graph) of points.
The display time is 1
number of points.
~portional to the number of graph lines and the
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