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26.2 When the Alarm LED is Blinking
When Alarm LED of drive is blinking, the protection function is generated. Please count the number of blink-
ing and refer to chart below. The Alarm LED is blinking 1 to 15 times (0.5 seconds on, 0.5 seconds off), the
same number of blinking will be repeated after 2 seconds.
Flash
Times
Alarm
Contents
Conditions
The Cause of Error
Checking Point
Corrective Measure
1
Over
Current
The cur-
rent through
motor-driv-
en devices
exceeds the
limit value
If motor has a problem
Checking the status of the
short-circuit of the motor cable.
(A and/A, B and B, A or /A
and motor body, B or /B and
Motor body)
① Replace the motor.
If drive has a problem
① If Alarm keep blinking after
replace the motor, replace
drive.
2
Over Speed
Motor speed
exceed
3,000rpm
The host controller like PLC
send speed command of over
3,000rpm
Checking speed command of
host controller (PLC)
① Lower the speed
command of the host controller.
3
Position
Tracking
Error
Position error
value is
higher than
90
˚
in motor
run state
The rotation of motor is not
smooth because of
mechanical problem
Checking the assemble status
of the unit(unscrews, debris,
and deformation structures)
① Fix the defected structure of
the equipment.
Operate motor when brake is
locked
Checking the brake cable by
brake operation sound.
Checking if 24V is supplied to
No.16terminal of I/O connector.
Checking the terminal signal of
No.17 of I/O connector. If brake
hold it self, it means 24V. if not
it is 0V.
① Fix the defect of brake.
② If brake control signal is
correct, replace the brake.
Motor does not operate
because motor is damaged
Checking if the motor bearing is
damaged. -> Power off the mo-
tor, and listening to sound while
rotate shaft of motor by hand.
Checking a short circuit and
disconnection of motor cable.
-> Checking a short circuit and
disconnection by multimeter.
① Replace the motor when
bearing is damaged, discon-
nection of motor cable and
short circuit.
Motor does not operate
because encoder is damaged
Checking the connection status
of encoder cable.
-> Checking short circuit,
disconnection, faulty wiring of
cable.
① Correct the mis-wiring.
② Replace the cable when
cable is disconnected.
③ Correct the short circuit.
Motor does not operate
because of transient shock to
mechanical
part
Cause of Shock elimination
① Remove the cause of the
shock.
If drive has a problem
① If Alarm keep blinking after
tried all of above, replace the
drive.
