11 - 9
11. TROUBLESHOOTING
Display Name
Definition
Cause
Action
(Note 2)
Alarm
detailed
information
A30 Regenerative
error
Permissible
regenerative power
of the built-in
regenerative
resistor or
regenerative option
is exceeded.
1. Wrong setting of parameter No.
PA02
Set correctly.
1
2. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative option to be
exceeded.
<Check method>
Check the regenerative load ratio on
the status display.
1. Reduce the frequency of
positioning.
2. Use the regenerative
option of larger capacity.
3. Reduce the load.
3. Power supply voltage is abnormal.
200V class: 260VAC or more
100V class: More than 135VAC
400V class: 535VAC or more
Check the power supply.
4. Built-in regenerative resistor or
regenerative option is not connected.
Connect correctly.
4
5. Built-in regenerative resistor or
regenerative option faulty.
Change the servo amplifier
or regenerative option.
Regenerative
transistor fault
6. Servo amplifier fault. (Regenerative
transistor faulty.)
<Check method>
1. The regenerative option has
overheated abnormally.
2. The alarm occurs even after
removal of the built-in regenerative
resistor or regenerative option.
Change the servo
amplifier.
7. Servo amplifier fault. (Regenerative
circuit fault)
Change the servo
amplifier.
2
A31 Overspeed Speed
has
exceeded the
instantaneous
permissible speed.
1. Small acceleration/deceleration time
constant caused overshoot to be
large.
Increase
acceleration/deceleration
time constant.
2. Servo system is instable to cause
overshoot.
1. Re-set servo gain to
proper value.
2. If servo gain cannot be
set to proper value.
1) Reduce load inertia
moment ratio; or
2) Reexamine
acceleration/
deceleration time
constant.
3. Electronic gear ratio is large
(parameters No.PA06, PA07)
Set correctly.
4. Encoder faulty.
Change the servo motor.
Summary of Contents for Melservo-J3 Series MR-J3-B
Page 19: ...10 MEMO ...
Page 55: ...1 36 1 FUNCTIONS AND CONFIGURATION MEMO ...
Page 61: ...2 6 2 INSTALLATION MEMO ...
Page 179: ...4 58 4 SIGNALS AND WIRING MEMO ...
Page 241: ...5 62 5 OPERATION MEMO ...
Page 357: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 385: ...11 28 11 TROUBLESHOOTING MEMO ...
Page 397: ...12 12 12 OUTLINE DRAWINGS MEMO ...
Page 755: ...17 70 17 SPEED CONTROL OPERATION MEMO ...
Page 793: ...App 38 APPENDIX MEMO ...
Page 799: ...MEMO ...