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10. Troubleshooting
10.1 Action to Be Taken upon Occurrence of Trouble
Upon occurrence of a problem, take an appropriate action according to the procedure below in order to ensure
speedy recovery and prevent recurrence of the problem.
a. Check the status of various LED indications for gateway unit.
[1] Gateway unit status indication LED (RUN, G.ER, C.ER, T.ER)
[2] SIO communication status (TxD, RxD)
[3] CC-Link communication status (RUN, ERR, RD, SD)
b. Presence/absence of abnormality in host controller (PLC, master station)
c. Presence/absence of abnormality in controller
d. Check the power voltage of the gateway unit.
e. Check the cables for connection error, disconnection and pinching.
Before performing a continuity check, turn off the power and disconnect the cables.
f. Check the noise elimination measures (grounding, installation of surge killer, etc).
g. Check the operation by the teaching box or personal computer software.
Connect the teaching box or the personal computer software to the gateway and operate each axis to
check the operation and presence/absence of alarm.
h. Check the input and output signals between the PLC and the controller.
[1] Check the PLC side by the monitor function of the personal computer software GX Developer
(Mitsubishi Electric).
[2] Check the controller by the personal computer software or status monitor of the teaching box.
[3] In the previous checks, check that there is no discrepancy between [1] and [2].
i. Review the events leading to the occurrence of a problem, as well as the operating condition at the
time of occurrence.
j. Analyzes the cause occurrence
k. Take action
Please check items a. through i. before contacting IAI.
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