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5. MONITOR FUNCTIONS AND THEIR USE
MELSEC-A
(3)
Sequence program created by using the PC CPU
A sequence program is necessary to display an error alert message on
the monitor screen when a bit device set in the Announcements list
window turns ON. This sequence program is required to turn the ap-
plicable bit device ON and OFF.
However, if the sequence program data for doing monitoring control can
be used as is, it is not necessary to create the following sequence
program.
(4)
Restrictions when creating monitoring screens
See Section 6.9 for restrictions when using the monitoring function in
which an error alert is to be displayed.
[Range in which the monitoring condition is set and the number of possible settings)
The following table indicates (a) the range of the set value in each window
for displaying an error alert, and (b) the number of possible monitoring
condition settings.
(1)
Error alert window
Number of Possible
Monitoring Condition
Setting Item
Setting Range/Option (Reference Section)
Remarks
Settings
On.
All
Screen
Screens
Display position
Lines 1 to 25, Columns 1 to 80
Color
Color Nos. 0 to 14 (see Section 6.4.1)
Col. Attribute
-
32767
Attribute
Normal/Reverse
x the
32767
num-
Magnification
1/2/4
(times)
(see Section 6.3.4)
ber of
screens
Alert message
1 to 64 characters
Within one line
[ see
]
Blink
Low speed (fixed)
Other blinks are
Section
interrupted
6.9.1
(2)
Announcements list window
Number of Possible
Monitoring Condition
Setting Item
Setting Range/Option (Reference Section)
Remarks
Settings
On.
All
Screen
Screens
Device
Bit device leading edge (see Section 6.7)
-
Alarm
ON/OFF
Error alert
1
256
For printing
-
points
Printer
ON/OFF
announcement
256
messages
lines
Announcement
48 characters/per line
Setting
message
Max.256 lines
contents/per point
5-51
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