YASKAWA SGD7S Product Manual page 420

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.070:
Motor Type
Change Detected
(The connected
motor is a differ-
ent type of motor
from the previ-
ously connected
motor.)
A.080:
Linear Encoder
Pitch Setting
Error
A.0b0:
Invalid Servo ON
Command Alarm
A.100:
Overcurrent
Detected
(An overcurrent
flowed through
the power tran-
sistor or the heat
sink overheated.)
12-14
Possible Cause
A Rotary Servomotor
was removed and a
–
Linear Servomotor
was connected.
A Linear Servomotor
was removed and a
–
Rotary Servomotor
was connected.
The setting of Pn282
(Linear Encoder Scale
Check the setting of
Pitch) has not been
Pn282.
changed from the
default setting.
The SV_ON (Servo
ON) command was
sent from the host
controller after a util- –
ity function that turns
ON the Servomotor
was executed.
The Main Circuit
Cable is not wired
Check the wiring.
correctly or there is
faulty contact.
Check for short-circuits
across Servomotor
There is a short-circuit
phases U, V, and W, or
or ground fault in a
between the ground
Main Circuit Cable.
and Servomotor phases
U, V, and W.
Check for short-circuits
across Servomotor
There is a short-circuit
phases U, V, and W, or
or ground fault inside
between the ground
the Servomotor.
and Servomotor phases
U, V, or W.
Check for short-circuits
across the Servomotor
There is a short-circuit connection terminals U,
or ground fault inside V, and W on the SER-
the SERVOPACK. VOPACK, or between
the ground and termi-
nals U, V, or W.
The regenerative
resistor is not wired
Check the wiring.
correctly or there is
faulty contact.
Check the power con-
The dynamic brake sumed by the DB resis-
(DB, emergency stop tor to see how
executed from the frequently the DB is
SERVOPACK) was being used. Or, check
frequently activated, the alarm display to see
or a DB overload if a DB overload alarm
alarm occurred. (A.730 or A.731) has
occurred.
Confirmation
Set the parameters for a
Linear Servomotor and
reset the motor type
alarm. Then, turn the
power supply to the SER-
VOPACK OFF and ON
again.
Set the parameters for a
Rotary Servomotor and
reset the motor type
alarm. Then, turn the
power supply to the SER-
VOPACK OFF and ON
again.
Correct the setting of
Pn282.
Turn the power supply to
the SERVOPACK OFF and
ON again. Or, execute a
software reset.
Correct the wiring.
The cable may be short-
circuited. Replace the
cable.
The Servomotor may be
faulty. Replace the Servo-
motor.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Correct the wiring.
Change the SERVOPACK
model, operating meth-
ods, or the mechanisms
so that the dynamic brake
does not need to be used
so frequently.
Continued from previous page.
Correction Reference
page 12-47
page 12-47
page 5-16
page 6-47
page 4-26
page 4-22
–
Continued on next page.