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6. TROUBLESHOOTING
6.6
When There is a Communication Error between Master Station
and AJ65BT-68TD
If the station number duplicate bit is turned on in the link special register SW0098 to SW009B
(duplicate station number status), check the corresponding station number of AJ65BT-68TD using the
following flow.
Troubleshooting flow when "ERR" LED of master station is flickering
"ERR." LED of master
station flickers
Do the
parameter setting
and loading system
configuration
match?
Correct parameter setting or
Y
loading system configuration
Is the
master station
link special register
SW0080 to SW0083 (other
station data link
status) turned
ON?
Y
Is the
master station
link special register
SW0098 to SW009B
(duplicate station
number status)
turned ON?
Y
Check the module whose
SW0098 to SW009B is ON
Is the station
number switch set
correctly?
Y
Restart the power supply/
Turn on the reset switch
Corresponding module failure
N
N
Master station failure
N
Check the module whose
SW0080 to SW0083 is ON
N
Is power supply
Set the station number
switch correctly
Is "POWER"
Is "RD" LED lit?
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N
turned ON?
Turn the power ON
Y
N
LED lit?
Y
Is the supplied
voltage within the
specified range?
Y
Corresponding module failure
N
Y
communication
cables connected
correctly?
Y
Corresponding module failure
6-4
Check on the master side
Check on the AJ65BT-68TD side
N
Set the supplied voltage
within the specified range
Are
N
*1
Correct the wiring of
communication cables
MELSEC-A
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