YASKAWA Sigma-V Series User Manual page 258

Alarm Number:
Alarm Name
(Alarm Description)
The setting of Pn515.2 (dynamic
brake answer signal (/DBANS)
input signal mapping) does not
agree with the contacts of the
dynamic brake contactor that is
A.100:
connected.
Overcurrent or Heat
Current flowed to the dynamic
Sink Overheated
brake resistor when power to the
(An overcurrent flowed
servomotor was ON due to weld-
through the IGBT or
ing or other failure of the
heat sink of SERVO-
dynamic brake contacts.
PACK overheated.)
A fault occurred in the SERVO-
PACK.
The motor wiring is faulty.
A.150:
Motor Winding Current
A fault occurred in the SERVO-
Unbalance
PACK or converter.
An external regenerative resistor
unit is not connected.
The regenerative resistor unit is
incorrectly wired, or is removed
or disconnected.
The connection of the I/O signals
(CN901) between the SERVO-
A.300:
PACK and converter is faulty.
Regeneration Error
A fault occurred in the SERVO-
PACK or converter.
The power supply voltage
exceeds the specified limit.
Insufficient regenerative resis-
tance, regenerative resistor
capacity.
Or, regenerative power has been
continuously flowing back.
Regenerative power continu-
ously flowed back because nega-
tive load was continuously
applied.
A.320:
The setting of parameter Pn600 is
Regenerative
smaller than the regenerative
Overload
resistor's capacity.
The regenerative resistance is too
high.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
A fault occurred in the SERVO-
PACK or converter.
Cause Investigative Actions
Check the setting of Pn515.2 and
the contacts of the dynamic brake
contactor.
Check the contactor to see if it is
welded.
−
Check the wiring.
−
Check the external regenerative
resistor unit connection.
Check the regenerative resistor unit
connection.
Check the connection of CN901.
−
Measure the power supply voltage.
Check the operating condition or
the capacity using the capacity
selection Software SigmaJunma-
Size+, etc.
Check the load applied to the servo-
motor during operation.
Check the regenerative resistor unit
connection and the value of the
Pn600.
Check the regenerative resistance.
Check the connection of CN901.
−
8.1 Alarm Displays
(cont'd)
Corrective Actions
Set Pn515.2 to agree with the con-
tacts of the dynamic brake contac-
tor.
The dynamic brake contactor may
have failed. Replace the dynamic
brake contactor.
Turn the control power supply OFF
and ON again. If the alarm still
occurs, the SERVOPACK or con-
verter may be faulty. Replace the
SERVOPACK or converter.
Make sure that the motor is cor-
rectly wired.
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
Connect the external regenerative
resistor unit.
Correctly connect the regenerative
resistor unit.
Correctly connect CN901.
While the main circuit power sup-
ply is OFF, turn the control power
supply OFF and then ON again. If
the alarm still occurs, the SERVO-
PACK or converter may be faulty.
Replace the SERVOPACK or con-
verter.
Set the power supply voltage within
the specified range.
Change the regenerative resistance,
regenerative resistor capacity.
Reconsider the operating conditions
using the capacity selection soft-
ware SigmaJunmaSize+, etc.
Reconsider the system including
servo, machine, and operating con-
ditions.
Set the Pn600 to a correct value.
Change the regenerative resistance
to a correct value or use an external
regenerative resistor of appropriate
capacity.
Correctly connect CN901.
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
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