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6. OPERATING THE VARIOUS LADDER MONITOR SCREENS
6 - 12
MELSEC
GOT
(2) When two occurrences of the search device are found.
If two occurrences of the search device are found as a result of the search, the
search will be completed and a message appears, telling that "the defect search is
interrupted."
Example: After searching for Device M120 that is in the OFF state, "M669" and
"X0025" will be displayed as devices that caused a failure.
57 Y0030
M
54
M120
STEP : 63/ 932
Print
Screen
Cancel
Print
Exit MenuPLCRD. Mon.
M120
*
6
6
9
9
X
0
0
2
5
the defect search is interrupted.
MENU *
List
After searching for Coil M120 that is in the OFF state, "M669" and
"X0025" are displayed as devices that are not conductive.
Example:
M669L, X0025
* After searching for a device that is in the ON state, devices that are
conductive are displayed. The entire field of the device name and
number is highlighted on-screen.
Example:
M6691, X0025
* To restart the defect search, touch
Menu
and then select
Fact.Sea.
from
among options that appears on-screen.
Select either of Contact M669 or X0025 and start the defect search again.
(3) To use the defect search, follow the instructions described below.
(a) If a B-contact is found defective as a result of the defect search, a search for
the cause of the ON/OFF state will be automatically switched.
(b) The monitoring of device data will be restarted after the defect search is
completed.
(c) Whether an A/B contact is conductive or nonconductive may not match its
screen display during and after the defect search. This is because the
monitoring is continued during the defect search.
(d) After the defect search is completed, touching
or
will allow you to
search from the ladder backward in the search results display mode. Up to
100 ladders can be displayed on-screen. The following messages will appear
at the start or the end of the search results.
•
When viewing the start of search results: "This is the start of search results."
•
When viewing the end of the search results: "This is the end of search
results."
The ON/OFF display of contacts and coils on one screen is limited to 11
contacts per 1 coil per 1 ladder. If there are several coils available, the
ON/OFF display of coils appears on-screen only for the device searched. If the
steps of search results are related to 100 ladders or more, the ON/OFF display
does not appear on-screen.
(e)
Menu
is replaced with
Esc
upon starting the defect search. Touching
Esc
can exit the search results display mode. Touching
Esc
again will replace it
with
Menu
. When returning to the ladder mode, the last step of search results
is displayed in the top of the screen.
(f) If on-screen data exceeds one screenful of data, it will be displayed across
automatically scrolled screens.
(g) Touching
Esc
can stop the defect search. Search results are continuously
displayed on-screen until
Esc
is touched. The ON/OFF display of the last-
searched ladder does not appear on-screen.