YASKAWA CACP-JU series, User Manual

Page: 283 / 340

11.2 Alarm Displays
11-29
Inspection, Maintenance, and
Troubleshooting
1 1
A.CC0:
Multiturn Limit
Disagreement
The multiturn limit value of the
encoder is different from that of
the SERVOPACK. Or, the multi-
turn limit value of the SERVO-
PACK has been changed.
Check the value of the Pn205 of the
SERVOPACK. Change the settings at the occur-
rence of alarm.
SERVOPACK failure
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.CF1:
Serial Converter Unit
Communications Error
(Reception error)
Wiring of cable between serial
converter unit and SERVOPACK
is incorrect or contact is faulty.
Check the external encoder wiring. Correct the cable wiring.
The specified cable is not used
between serial converter unit and
SERVOPACK.
Confirm the external encoder wir-
ing specifications.
Use the specified cable.
Cable between serial converter
unit and SERVOPACK is too
long.
Measure the external encoder cable
length.
Use 20 m cable max.
Sheath of cable between serial
converter unit and SERVOPACK
is broken.
Check the external encoder cable. Replace the cable.
A.CF2:
Serial Converter Unit
Communications Error
(Timer stop)
Noise interferes with the cable
between serial converter unit and
SERVOPACK.
−
Correct the wiring around serial
converter unit, e.g., separating
input/output signal line from main
circuit cable or grounding.
Serial converter unit failure
−
Replace the serial converter unit.
SERVOPACK failure
−
Replace the SERVOPACK.
A.D00:
Position Error Pulse
Overflow
(Position error exceeded
the value set in the
excessive position error
alarm level (Pn520))
The contact in the servomotor U,
V, and W wirings is faulty. Check the motor main circuit cable
connection.
Confirm that there is no contact
fault in the motor wiring of encoder
wiring.
The position reference speed is
too high.
Reduce the reference speed, and
operate the SERVOPACK.
Reduce the position reference speed
or acceleration of position refer-
ence.
The acceleration of the position
reference is too high. Reduce the reference acceleration,
and operate the SERVOPACK. Reduce the reference acceleration
of the position reference.
Setting of the Pn520 (Excessive
Position Error Alarm Level) is
low against the operating condi-
tion.
Check the alarm level (Pn520) to
see if it is set to an appropriate
value.
Set the Pn520 to proper value.
SERVOPACK failure
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the SERVOPACK may be
faulty. Replace the SERVOPACK.
A.D01:
Position Error Pulse
Overflow Alarm at
Servo ON
The SV_ON command (Enable
operation) is received when the
number of position error pulses is
greater than the set value of
Pn526 while the servomotor
power is OFF.
Check the error counter monitor in
SigmaWin for the
Σ
-V-SD (MT)
while the servomotor power is OFF.
Correct the excessive position error
alarm level at servo ON (Pn526).
(cont’d)
Alarm:
Alarm Name
Cause Investigative Actions Corrective Actions