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8-15
8-3 Troubleshooting
Troubleshooting
8
Error Diagnosis Using the Operating Status
Symptom
Probable cause
Items to check
Countermeasure
7-segment
LED is not lit.
No control power supply.
Check that the control power supply
voltage is within the specified
range.
Ensure that power is
supplied properly.
Check that the power supply input
is wired correctly.
Wire correctly.
LED (COM)
is not lit.
MECHATROLINK-II
communications not
actuated.
Check that the network cable
is connected correctly.
Check that the host
controller is running.
Check that the terminator is
connected.
Check the connector and
connection.
LED (COM)
is flashing in
green.
Asynchronous communica-
tions on the
MECHATROLINK-II
communications actuated.
Can be controlled from the host
controller (Normal status).
Normal status.
LED (COM)
is lit in green.
Synchronous communica-
tions on the
MECHATROLINK-II
communications actuated.
Controllable status (Normal status). Normal status.
LED (COM)
is flashing in red.
Recoverable alarm related
to MECHATROLINK-II
communications.
Reset and actuate the network
again from the host controller.
Check the network wiring.
Check the wiring and noise.
LED (COM)
is lit in red.
Irrecoverable alarm related
to MECHATROLINK-II
communications.
Check that there is no overlap of
node address on the network, and
that the number of connected
Servo Drives is less than 17.
Correct the network
address.
An alarm has
occurred.
Read the alarm code and
the alarm history.
Check details of alarm by referring
to Error Diagnosis Using the Dis-
played Alarm Codes on page 8-7.
Take countermeasures by
referring to Error Diagnosis
Using the Displayed Alarm
Codes on page 8-7.