YASKAWA E-V Series User Manual page 301

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
Alarm:
Alarm Name
A.080:
Linear Scale
Pitch Setting
Error
A.0b0:
Cancelled Servo ON
Command Alarm
A.100:
Overcurrent or Heat
Sink Overheated
(An overcurrent flowed
through the IGBT or
heat sink of SERVO-
PACK overheated.)
9-8
Cause
The setting of the linear scale
pitch (Pn282) has not been
changed from the default setting.
After executing the utility func-
tion to turn ON the power to the
motor, the Servo ON command
was sent from the host controller.
Incorrect wiring or contact fault
of main circuit cable or motor
main circuit cable.
Short-circuit or ground fault of
main circuit cable or motor main
circuit cable.
Short-circuit or ground fault
inside the servomotor.
Short-circuit or ground fault
inside the SERVOPACK.
Incorrect wiring or contact fault
of the regenerative resistor.
The dynamic brake (DB: Emer-
gency stop executed from the
SERVOPACK) was frequently
activated, or the DB overload
alarm occurred.
The generated regenerative
energy exceeded the SERVO-
PACK regenerative energy pro-
cessing capacity.
The SERVOPACK regenerative
resistance is too small.
A heavy load was applied while
the servomotor was stopped or
running at a low-speed.
Malfunction caused by noise
interference.
A SERVOPACK fault occurred.
Investigative Actions
Check the value of Pn282.
−
Check the wiring. Refer to 3.1
Main Circuit Wiring.
Check for short-circuits across the
servomotor terminal phase-U, -V,
and -W, or between the grounding
and servomotor terminal U, V, or W.
Refer to 3.1 Main Circuit Wiring.
Check for short-circuits across the
servomotor terminal phase-U, -V,
and -W, or between the grounding
and servomotor terminal U, V, or W.
Refer to 3.1 Main Circuit Wiring.
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. Refer to 3.1 Main Cir-
cuit Wiring.
Check the wiring. Refer to 3.6
Connecting Regenerative Resis-
tors.
Check the resistor power consump-
tion monitor Un00B to see how
many times the DB has been used.
Or, check the alarm trace back mon-
itor Fn000 to see if the DB overload
alarm A.730 or A.731 was reported.
Check the regenerative load ratio
monitor Un00A to see how many
times the regenerative resistor has
been used.
Check the regenerative load ratio
monitor Un00A to see how many
times the regenerative resistor has
been used.
Check to see if the operating condi-
tions are outside servo drive specifi-
cations.
Improve the wiring or installation
environment, such as by reducing
noise, and check to see if the alarm
recurs.
−
Corrective Actions
Correct the value of Pn282.
Restart the system including the
host controller.
Correct the wiring.
Some cables may be damaged.
Repair or replace damaged cables.
The servomotor may be faulty.
Repair or replace the servomotor.
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Correct the wiring.
Change the SERVOPACK model,
operation conditions, or the mecha-
nism so that the DB does not need
to be used so frequently.
Check the operation condition
including overload, and reconsider
the regenerative resistor value.
Change the regenerative resistance
value to a value larger than the
SERVOPACK minimum allowable
resistance value.
Reduce the load applied to the ser-
vomotor or increase the operation
speed.
Take countermeasures for noise,
such as correct wiring of the FG.
Use an FG wire size equivalent to
the SERVOPACK main circuit wire
size.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Repair or replace the SER-
VOPACK.