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15. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
Display Name Definition Cause Action
A.30 Regenerative
error
Permissible regenerative
power of regenerative
option is exceeded.
1. Incorrect setting of parameter
No.PA01.
Set correctly.
2. Regenerative option is not
connected.
Connect correctly.
3. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative option to be
exceeded.
Checking method
Call the status display or MR
Configurator and check the
regenerative load ratio.
1. Reduce the frequency of
positioning.
2. Use the regenerative option of
larger capacity.
3. Reduce the load.
4. Power supply voltage is abnormal.
MR-J3-CR55K: 260VAC or more
MR-J3-CR55K4: 520VAC or more
Review power supply
5. Regenerative option faulty. Change regenerative option.
6. Ground fault occurred in servo motor
power (U, V, W).
Correct the wiring.
Regenerative transistor fault 7. Regenerative transistor faulty.
Checking method
1)
2)
The regenerative option has
overheated abnormally.
The alarm occurs even after
removal of the built-in
regenerative resistor or
regenerative option.
Change the converter unit.
A.33 Over voltage Converter bus voltage
exceeded to following
voltage.
MR-J3-CR55K: 400VDC
MR-J3-CR55K4: 800VDC
1. Regenerative option is not used. Use the regenerative option.
2. Though the regenerative option is
used, the parameter No.PA01 setting
is "
00 (not used)".
Set correctly.
3. Lead of regenerative option is open
or disconnected.
1. Change lead.
2. Connect correctly.
4. Regenerative transistor faulty. Change the converter unit.
5. Wire breakage of regenerative
option.
Change the regenerative option.
6. Capacity of regenerative option is
insufficient.
Add regenerative option or
increase capacity.
7. Power supply voltage high. Review the power supply.
8. Ground fault occurred in servo motor
power (U, V, W).
Correct the wiring.
9. Impedance at main circuit power
supply cable (L
1
, L
2
, L
3
) is high, and
leak current from servo motor power
supply cable (U, V, W) is large.
Use the regenerative option.
A.37 Parameter
error
Parameter setting is
incorrect.
1. Converter unit fault caused the
parameter setting to be rewritten.
Change the converter unit.
2. Regenerative option not used with
converter unit was selected in
parameter No.PA02.
Set parameter No.PA01 correctly.
3. The number of write times to
EEP-ROM exceeded 100,000 due to
parameter write, etc.
Change the converter unit.