13. USING A LINEAR SERVO MOTOR
13 - 75
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
50.1 Thermal
overload
error 1 during
operation
(1) Servo amplifier is used in
excess of its continuous
output current.
Check the effective load
ratio.
Effective load ratio is
large.
Reduce load.
Check operation
pattern.
Use servo motor that
provides larger output.
Effective load ratio is
small.
Check (2).
(2) Servo system is instable
and causing oscillation.
Check for oscillation in
motor.
Oscillation is
occurring.
Adjust the gain.
Oscillation
is
not
occurring.
Check (3).
(3)
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 15
minutes or longer
subsequent to the output
of the alarm.
Reset. Check
(4).
(4) Servo amplifier is faulty.
Replace the servo
amplifier, and check the
reproducibility of the error.
Not reproduced.
Replace the servo
amplifier.
50.2
(1) Machine struck something. Check if the machine
struck something.
Machine struck.
Review the operation
pattern.
Thermal overload
error 2 during
operation
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)
Check the wiring of U, V
and W phases.
Problem found.
Perform wiring
correctly.
Incorrect connections
to/from the linear servo
motor.
No problem found.
Check (4).
(4)
Setting is incorrect.
Correct the setting.
Resolution of the linear
encoder and the
resolution setting of the
parameter are different.
Review the parameter
No.PS02 and PS03
settings.
Setting is correct.
Check (5).
(5)
The polarity is
incorrect.
Correct the setting.
Polarity of the linear
encoder is incorrect.
(Installation direction is
incorrect.)
Check polarities of the
linear encoder and the
linear servo motor.
Normal. Check
(6).
(6)
Not reproduced.
Perform the magnetic
pole detection.
Initial magnetic pole
detection is not
performed.
Perform the magnetic
pole detection again, and
check the reproducibility
of the error.
Reproduced. Check
(7).
(7) Linear encoder is faulty.
Not reproduced.
Replace the servo
motor.
Replace the servo motor,
and check the
reproducibility of the error. Reproduced. Check
(8).
(8) Servo amplifier is used in
excess of its continuous
output current.
Examine checkpoints described in the alarm display "50.1".
(9) Servo system is instable
and causing oscillation.
(10) Servo amplifier is faulty.
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 ...