Instruction manual

9. TROUBLESHOOTING
94 IMR01Y06-E6
 COM-JC
Problem Possible cause Solution
FAIL lamp flashes
RUN lamp OFF
SD/RD lamp OFF
No connection, disconnection,
breakage or wrong wiring of CC-Link
cable
Confirm the connection method or
condition and connect correctly
A termination resistor of CC-Link is
not connected
Confirm the termination resistor, and
connected correctly
The number of Occupied station/
Extended cyclic setting of the
COM-JC differs from that of the
master instrument (PLC).
Coincide the number of Occupied
station/Extended cyclic setting of the
COM-JC with that of the master
instrument (PLC).
The station number and
communication speed settings of the
COM-JC have been changed during
communication.
• Turn on the power again.
• Return the switch setting to the
original setting.
FAIL lamp ON
RUN lamp OFF
SD/RD lamp OFF
The station number and
communication speed settings of
COM-JC are out of their setting
ranges.
Set the station number and
communication speed settings of
COM-JC to values within their setting
ranges.
FAIL lamp flashes
RUN lamp ON
SD/RD lamp flashes
The CC-Link version of the COM-JC
differs from that of the master
instrument (PLC).
Coincide the CC-Link version of the
COM-JC with that of the master
instrument (PLC).
• 1 station occupied 1 time/
4 stations occupied 1 time:
CC-Link Ver. 1.10
• 4 stations occupied 2 times:
CC-Link Ver. 2.00
RUN lamp flashes Controller communication (Between
COM-JC and controllers) is abnormal
• Check that the signal line of the
COM-JC and controller are correctly
connected.
• Check that the communication setting
(Address, protocol, communication
speed and data bit configuration) of
the COM-JC coincides with that of
the controller.
• Confirm whether a termination
resistor is connected.
FAIL lamp ON Hardware abnormality or software
abnormality
Replace the COM-JC with a new one it
in the abnormal state even with the
power turned on again.
Can not recognize the
controller
Incorrect sequence of power-on
COM-JC must be powered on last.