YASKAWA SGDV-120A, Manual

Page: 9 / 53

A SERVOPACK fault
occurred.
--
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.730
A.731
Dynamic
Brake
Overload
(An
excessive
power
consumption
of
dynamic
brake was
detected.)
The servomotor rotates
because of external force. Check the operation
status.
Take measures to ensure the
servomotor will not rotate because
of external force.
The rotating energy at a DB
stop exceeds the DB
resistance capacity.
Check the power
consumed by DB
resistance (Un00B) to
see how many times
the DB has been used. Reconsider the following: . Reduce
the servomotor reference speed. .
Reduce the moment of inertia ratio.
. Reduce the number of times of the
DB stop operation.
A SERVOPACK fault
occurred.
--
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.740
Overload
of Surge
Current
Limit
Resistor
(The main
circuit
power is
turned
ON/OFF
too
frequently.)
The inrush current limit
resistor operation frequency
at the main circuit power
supply ON/OFF operation
exceeds the allowable
range.
--
Reduce the frequency of turning the
main circuit power supply ON/OFF.
A SERVOPACK fault
occurred.
--
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.7A0
Heat Sink
Overheated
(Detected
when the
heat sink
temperature
exceeds
100°C.)
The surrounding air
temperature is too high.
Check the surrounding
air temperature using a
thermostat. Decrease the surrounding air
temperature by improving the
SERVOPACK installation conditions.
The overload alarm has
been reset by turning OFF
the power too many times.
Check the alarm
history display (Fn000)
to see if the overload
alarm was reported.
Change the method for resetting
the alarm.
A.7A0
(cont.)
Heat Sink
Overheated
(Detected
when the
heat sink
temperature
exceeds
100°C.)
Excessive load or operation
beyond the regenerative
energy processing capacity.
Check the accumulated
load ratio (Un009) to
see the load during
operation, and the
regenerative load ratio
(Un00A) to see the
regenerative energy
processing capacity.
Reconsider the load and operating
conditions.
Incorrect SERVOPACK
installation orientation
or/and insufficient space
around the SERVOPACK.
Check the SERVOPACK
installation conditions. Install the SERVOPACK correctly as
specified.
A SERVOPACK fault
occurred.
--
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.7AB
Built-in
Fan in
SERVOPACK
Stopped
The fan inside the
SERVOPACK stopped.
Check for foreign
matter or debris inside
the SERVOPACK.
Remove foreign matter or debris
from the SERVOPACK. If the alarm
still occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.810
Encoder
Backup
Error
(Only
when an
absolute
encoder is
connected.)
(Detected
on the
Alarm occurred when the
power to the absolute
encoder was initially turned
ON.
Check to see if the
power was turned ON
initially.
Set up the encoder (Fn008).
The encoder cable
disconnected, and
connected again. Check to see if the
power was turned ON
initially.
Confirm the connection and set up
the encoder (Fn008).
The power from both the
control power supply (+5 V)
from the SERVOPACK and
the battery power supply is
not being supplied.
Check the encoder
connector battery or
the connector contact
status. Replace the battery or take similar
measures to supply power to the
encoder, and set up the encoder
(Fn008).