5.3 Troubleshooting Alarms
5
Maintenance
5-15
A.330:
Main Circuit
Power Supply
Wiring Error
(Detected when
the main circuit
power supply is
turned ON.)
The regenerative
resistor was discon-
nected when the
SERVOPACK power
supply voltage was
high.
Measure the resistance
of the regenerative
resistor using a measur-
ing instrument.
If you are using the regen-
erative resistor built into
the SERVOPACK, replace
the SERVOPACK.
If you are using an Exter-
nal Regenerative Resis-
tor, replace the External
Regenerative Resistor.
–
DC power was sup-
plied when an AC
power supply input
was specified in the
settings.
Check the power sup-
ply to see if it is a DC
power supply.
Correct the power supply
setting to match the
actual power supply.
*1
AC power was sup-
plied when a DC
power supply input
was specified in the
settings.
Check the power sup-
ply to see if it is an AC
power supply.
Correct the power supply
setting to match the
actual power supply.
Pn600 (Regenerative
Resistor Capacity) is
not set to 0 and an
External Regenerative
Resistor is not con-
nected to an SGD7S-
2R8A SERVOPACKs.
Check to see if an
External Regenerative
Resistor is connected
and check the setting of
Pn600.
Connect an External
Regenerative Resistor, or
if an External Regenera-
tive Resistor is not
required, set Pn600 to 0.
*1
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
A.400:
Overvoltage
(Detected in the
main circuit
power supply
section of the
SERVOPACK.)
The power supply
voltage exceeded the
specified range.
Measure the power
supply voltage.
Set the AC/DC power
supply voltage within the
specified range.
–
The power supply is
not stable or was
influenced by a light-
ning surge.
Measure the power
supply voltage.
Improve the power sup-
ply conditions, install a
surge absorber, and then
turn the power supply
OFF and ON again. If an
alarm still occurs, the
SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
The voltage for AC
power supply was too
high during accelera-
tion or deceleration.
Check the power sup-
ply voltage and the
speed and torque
during operation.
Set the AC power supply
voltage within the speci-
fied range.
–
The external regener-
ative resistance is too
high for the operating
conditions.
Check the operating
conditions and the
regenerative resistance.
Select a regenerative
resistance value that is
appropriate for the oper-
ating conditions and load.
*4
The moment of inertia
ratio or mass ratio
exceeded the allow-
able value.
Check to see if the
moment of inertia ratio
or mass ratio is within
the allowable range.
Increase the deceleration
time, or reduce the load.
–
A failure occurred in
the SERVOPACK.
–
While the main circuit
power supply is OFF, turn
the control power supply
to the SERVOPACK OFF
and ON again. If an alarm
still occurs, the SERVO-
PACK may be faulty.
Replace the SERVO-
PACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause
Confirmation
Correction
Reference
