8. TROUBLESHOOTING
8 - 24
Alarm No.50
Name: Overload 1
Stop method: Corresponding axis stops
Alarm description
Load exceeds overload protection characteristic of servo amplifier.
Display Name
Cause
Checkpoint
Finding
Action
50.4
(1)
Activated.
Review the wiring
Thermal overload
error 1 during a
stop
Electromagnetic brake is
activated.
Check if the
electromagnetic brake is
activated during
operation.
Not activated.
Check (2).
(2) Servo amplifier is used in
excess of its continuous
output current.
Check the effective load
ratio with MR
Configurator.
Effective load ratio is
large.
Reduce load.
Check operation
pattern.
Use servo motor that
provides larger output.
Effective load ratio is
small.
Check (3).
(3)
Check for hunting.
Hunting occurs.
Adjust the gain.
Hunting occurs during
servo lock.
Hunting does not
occur.
Check (4).
(4)
Not reset.
Reset the alarm after
sufficient cool-off time.
After the overload alarm
has been output, the
operation is restarted
without having cool-off
time.
Check if the alarm is
reset after waiting 30
minutes or longer
subsequent to the output
of the alarm.
Reset. Check
(5).
(5) Servo amplifier is faulty.
Replace the servo
amplifier, and check the
reproducibility of the error.
Not reproduced.
Replace the servo
amplifier.
50.5 (1)
Machine
struck
something.
Check if the machine
struck something.
Machine struck.
Review the operation
pattern.
Thermal overload
error 2 during a
stop
Machine did not strike. Check (2).
(2) Power cable is cut.
Check the power cable.
Problem found.
Modify the wiring.
No problem found.
Check (3).
(3)
Incorrect
connections
to/from the servo motor.
Check the wiring of U, V
and W phases.
Problem found.
Perform wiring
correctly.
No problem found.
Check (4).
(4) Electromagnetic brake is
activated.
Examine checkpoints described in the alarm display "50.4".
(5) Servo amplifier is used in
excess of its continuous
output current.
(6) Hunting occurs during a
stop.
(7) Servo amplifier is faulty.
(8) Encoder is faulty.
Replace the servo motor,
and check the
reproducibility of the error.
Not reproduced.
Replace the servo
motor.
Summary of Contents for MELSERVO-J3W Series
Page 17: ...8 MEMO ...
Page 27: ...1 FUNCTIONS AND CONFIGURATION 1 10 MEMO ...
Page 87: ...4 STARTUP 4 14 MEMO ...
Page 117: ...5 PARAMETERS 5 30 MEMO ...
Page 129: ...6 GENERAL GAIN ADJUSTMENT 6 12 MEMO ...
Page 185: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 241: ...11 OPTIONS AND AUXILIARY EQUIPMENT 11 56 MEMO ...
Page 274: ...13 USING A LINEAR SERVO MOTOR 13 25 1 2 3 4 ...