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13. SERVO AMPLIFIERS WITH A LARGE CAPACITY (30k TO 55kW)
Display Name Definition Cause Action
1. Wrong 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 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 converter unit or
regenerative option.
Permissible regenerative
power of regenerative
option is exceeded.
6. Ground fault occurred in servo motor
power (U, V, W).
Correct the wiring.
A.30 Regenerative
error
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.
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.
A.33 Over voltage Converter bus voltage
exceeded to following
voltage.
MR-J3-CR55K: 400VDC
MR-J3-CR55K4: 800VDC
8. Ground fault occurred in servo motor
power (U, V, W).
Correct the wiring.
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.
A.37 Parameter
error
Parameter setting is wrong.
3. The number of write times to
EEP-ROM exceeded 100,000 due to
parameter write, etc.
Change the converter unit.