16 - 109
16. INDEXER POSITIONING OPERATION
Display Name
Definition
Cause
Action
(Note 2)
Alarm
detailed
information
A24
Main circuit
error
Ground fault
occurred at the
servo motor
power output
(U, V, and W).
1. Power input lines and servo motor power lines are
in contact. (Power input lines and servo motor
power lines are in contact with the main circuit
terminal block (TE1). )
Connect correctly.
2. A ground fault or short occurred at the servo motor
power cable.
(A ground fault or short due to the deterioration of
insulator.)
Repair the cable.
3. Servo amplifier fault.
<Check method>
The alarm occurs even if servo motor power lines
are disconnected from the power output (U, V, and
W).
Change the servo
amplifier.
4. Servo motor fault.
<Check method>
The alarm does not occur when the power is
switched on after disconnection of servo motor
power lines in servo motor side terminal.
Change the servo
motor.
5. Malfunction of external dynamic brake.
<Check method>
The alarm does not occur when the power is
switched on after disconnection of servo motor
power lines in external dynamic brake-side terminal.
1. Check the parameter
and dynamic brake
sequence.
2. Change the external
dynamic brake.
6. External noise caused the overcurrent detection
circuit to misoperate.
<Check method>
1. Check if the environment is affected by the noise
of surrounding electromagnetic valve, magnetic
contactor, relay, etc.
2. Check the servo amplifier and servo motor for
grounding.
Take the grounding and
noise reduction
techniques.
A25
Absolute
position erase
Absolute
position data is
erased.
1. Voltage drop in encoder
(Battery disconnected.)
Connect the battery and
make home position
setting again.
2. Battery voltage low
Change the battery.
Always make home
position setting again.
3. Battery connector is loosely connected or battery
is faulty.
4. Encoder cable is faulty.
Repair or replace the
encoder cable.
5. Encoder fault.
Change the servo
motor.
Power was
switched on for
the first time in
the absolute
position
detection
system.
Home position not set.
Connect the battery and
make home position
setting again.
Содержание Melservo-J3 Series MR-J3-B
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