11 Inspection, Maintenance, and Troubleshooting
11.2.3 Troubleshooting of the Servo Drive Alarms
11-14
A.05A:
Induction Motor
Combination Error
(The capacity of the
spindle motor is outside
of the range that can be
combined.)
The SERVOPACK capacity and
spindle motor capacity are not
compatible.
Check the combination of the SER-
VOPACK capacity and servomotor
capacity.
Align the SERVOPACK capacity
and spindle motor capacity.
A.05B:
Converter
Combination Error
(The converter and SER-
VOPACK are not com-
bined correctly.)
A converter that does not support
an emergency stop was used with
Pn01B.0 set to 1.
−
Replace the converter.
A.0B0:
Cancelled Servo ON
Command Alarm
After executing the utility func-
tion to turn ON the power to the
motor, the Servo ON command
was sent from the host controller.
−
Turn the SERVOPACK power sup-
ply OFF and then ON again.
A.100:
Overcurrent
(An overcurrent flowed
through the IGBT or
heat sink of SERVO-
PACK overheated.)
Incorrect wiring or contact fault
of main circuit cable or motor
main circuit cable.
Check the wiring.
Correct the wiring.
Short-circuit or ground fault of
main circuit cable or motor main
circuit cable.
Check for short-circuits across the
cable phase-U, -V, and -W, or
between the grounding and terminal
U, V, or W.
Some cables may be damaged.
Replace damaged cables.
Short-circuit or ground fault
inside the motor.
Check for short-circuits across the
motor terminal phase-U, -V, and -
W, or between the grounding and
motor terminal U, V, or W.
The motor may be faulty. Replace
the motor.
Short-circuit or ground fault
inside the SERVOPACK.
Check for short-circuits across the
servomotor connection terminals U,
V, and W on the SERVOPACK, or
between the grounding and terminal
U, V, or W.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The dynamic brake (DB: Emer-
gency stop executed from the
SERVOPACK) was frequently
activated, or the DB overload
alarm occurred.
Check the resistor power consump-
tion monitor in SigmaWin for the
Σ
-
V-SD (MT) to see how many times
the DB has been used. Or, check the
alarm history to see if the DB over-
load alarm A.730 or A.731 was
reported.
Change the SERVOPACK model,
operation conditions, or the mecha-
nism so that the DB does not need
to be used so frequently.
A heavy load was applied while
the motor was stopped or running
at a low-speed.
Check to see if the operating condi-
tions are outside servo drive specifi-
cations.
Reduce the load applied to the
motor or increase the operation
speed.
Malfunction caused by noise
interference.
Improve the wiring or installation
environment, such as by reducing
noise, and check to see if the alarm
recurs.
Take countermeasures for noise,
such as correct wiring of the FG.
Use an FG wire size equivalent to
the SERVOPACK main circuit wire
size.
SERVOPACK failure
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
(cont’d)
Alarm:
Alarm Name
Cause
Investigative Actions
Corrective Actions
