8. TROUBLESHOOTING
8 - 14
Alarm No.25
Name: Absolute position erase
Stop method: Corresponding axis stops
Alarm description
Error is found in absolute position data.
Power is switched on for the first time in the absolute position detection system.
Display Name
Cause
Checkpoint
Finding
Action
25.1 Absolute
position
data erase
(1)
Check if the action stated
in the left is performed.
Performed.
Check the battery is
installed and make
home position return.
Power is switched on for
the first time in the
absolute position
detection system.
Not performed.
Check (2).
(2) Battery is removed
(replaced) when the
control circuit power is off.
Check if the action stated
in the left is performed.
Performed.
Check the battery is
installed and make
home position return.
Not performed.
Check (3).
(3) Battery voltage is low.
(Battery is consumed.)
Check the battery voltage
using a tester.
Below 3.0VDC.
Contact your local
sales office.
3.0VDC or more.
Check (4).
(4) The battery cable is
faulty.
Check for poor contact
using a tester.
Problem found.
Replace the battery
cable.
No problem found.
Check (5).
(5) Encoder cable is faulty.
Problem found.
Repair or replace
encoder cable.
Check for poor contact
using a tester.
Check the voltage on the
motor side.
No problem found.
Check (6).
(6) Encoder is faulty.
Check if the voltage drops
even when new battery is
connected.
Drops.
Replace the servo
motor.
Alarm No.30
Name: Regenerative error
Stop method: All axes stop
Alarm description
Permissible regenerative power of the built-in regenerative resistor or regenerative option is exceeded.
Regenerative transistor in the servo amplifier is faulty.
Display Name
Cause
Checkpoint
Finding
Action
30.1 Regeneration
heat error
(1)
The setting is
incorrect.
Correct the setting.
Regenerative resistor
(regenerative option)
setting is incorrect.
Check the regenerative
resistor (regenerative
option) in use and PA02
setting.
Correct the setting.
Check (2).
(2)
Not
connected
properly.
Connect properly.
Regenerative resistor
(regenerative option) is
not connected.
Check if the regenerative
resistor (regenerative
option) is properly
connected.
Connected properly.
Check (3).
(3) Power supply voltage is
high.
Check the input power
supply voltage.
230VAC or more.
Lower the power
supply voltage.
Below 230VAC.
Check (4).
(4) Regenerative load ratio is
over 100 .
Check the regenerative
load ratio with MR
Configurator when alarm
occurs.
Over 100 .
Reduce the frequency
of positioning.
Increase the
deceleration time
constant.
Reduce the load.
Use a regenerative
option if not being
used.
30.2 Regenerative
transistor error
(1) Regenerative transistor is
faulty.
Overheated
abnormally.
Replace the servo
amplifier.
Check if the regenerative
resistor (regenerative
option) is overheated
abnormally.
Not overheated
abnormally.
Contact your local
sales office.
30.3 Regenerative
transistor
feedback data
error
(1) Detection circuit of the
servo amplifier is faulty.
Disconnect wires that are
connected to P and N,
and then drive the servo
amplifier.
Alarm occurs.
Replace the servo
amplifier.
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 ...