Yaskawa Sigma-5 Large Capacity Users Manual: Design and Maintenance-Rotary Motors-Analog Voltage and Pulse Train Reference - Manual (Page 366)

10 Troubleshooting
10.1.2 Troubleshooting of Alarms
10-10
A.300:
Regeneration Error
An external regenerative resistor
unit is not connected.
Check the external regenerative
resistor unit connection.
Connect the external regenerative
resistor unit.
The regenerative resistor unit is
incorrectly wired, or is removed
or disconnected.
Check the regenerative resistor unit
connection.
Correctly connect the regenerative
resistor unit.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
Check the connection of CN901. Correctly connect CN901.
A fault occurred in the SERVO-
PACK or converter.
−
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.
A.320:
Regenerative
Overload
The power supply voltage
exceeds the specified limit.
Measure the power supply voltage.
Set the power supply voltage within
the specified range.
Insufficient regenerative resis-
tance, regenerative resistor
capacity.
Or, regenerative power has been
continuously flowing back.
Check the operating condition or
the capacity using the capacity
selection Software SigmaJunma-
Size+, etc.
Change the regenerative resistance,
regenerative resistor capacity.
Reconsider the operating conditions
using the capacity selection soft-
ware SigmaJunmaSize+, etc.
Regenerative power continu-
ously flowed back because nega-
tive load was continuously
applied.
Check the load applied to the servo-
motor during operation.
Reconsider the system including
servo, machine, and operating con-
ditions.
The setting of parameter Pn600 is
smaller than the regenerative
resistor's capacity.
Check the regenerative resistor unit
connection and the value of the
Pn600.
Set the Pn600 to a correct value.
The regenerative resistance is too
high.
Check the regenerative resistance.
Change the regenerative resistance
to a correct value or use an external
regenerative resistor of appropriate
capacity.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
Check the connection of CN901. Correctly connect CN901.
A fault occurred in the SERVO-
PACK or converter.
−
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
A.330:
Main Circuit Power
Supply Wiring Error
(Detected when the
power to the main circuit
is turned ON.)
The regenerative resistor unit was
disconnected when the power
supply voltage to the SERVO-
PACK and converter was high.
Measure the resistance of the regen-
erative resistor unit using a measur-
ing instrument.
Replace the regenerative resistor
unit.
DC power was supplied.
Check the power supply to see if it
is a AC power supply.
Use an AC power supply.
An regenerative resistor unit is
not connected. Check the regenerative resistor unit
connection.
Connect the regenerative resistor
unit.
The 1 and 2 terminals of the
converter are open.
Check the 1 and 2 terminals on
the converter.
Correctly connect the 1 and 2
terminals on the converter.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
Check the connection of CN901. Correctly connect CN901.
A fault occurred in the SERVO-
PACK or converter.
−
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause Investigative Actions Corrective Actions