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8. TROUBLESHOOTING
MELSEC-A
8.5
Checking Canvas Data
If the canvas data in the ROM installed to the AD57G is different from the
canvas data to be monitored, one of the following failure occurs.
In that case, remake canvas data using the AD57GP and store it to the ROM.
Then, start monitoring again. (*I)
(a) Indefinite data is displayed and/or printed.
(b)
Monitor screens and parts which are different from that designated
are displayed.
(c) Monitor screens cannot be switched or printed even after set
monitoring conditions are established.
* I :
Before starting remaking
of canvas
data, check the contents of drawing and
setting using the GED and AD57GP.
8.6
Checking the LEDs on the AD57G
The LEDs on the AD57G turn ON and OFF under the following conditions.
If an LED turns ON or OFF abnormally, the AD57G may have hardware or
system software failure. If this happens, replace the hardware.
KEY-IN
MEMORY
Conditions
1
ONIOFF
1
Remark
I
RUNISTOP
keyswitch
position
MEMORY
ON
ON
When
a
CARD switch
memory card
Setting
OFF
OFF
is installed
*I
State of key
input
L
"I: When this LED is OFF, the memory card is not accessible
Enabled
ON
RUNISTOP
Disabled
/
OFF
keyswitch is in
RUN position.
I
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