Yaskawa Junma Series SERVOPACK - Manual (Page 77)

6.1 Alarm Indicator Lights
E-76
Encoder
error Power was
turned ON or
during servo-
motor opera-
tion. The encoder wiring and the con-
tact are incorrect. Correct the encoder wiring.
Noise interference occurred due
to incorrect encoder cable spec-
ifications. Use twisted-pair or shielded
twisted-pair cables with a core
of at least 0.12 mm
2 .
Noise interference occurred
because the wiring distance for
the encoder cable is too long. The wiring distance must be
20 m maximum.
The encoder cable is discon-
nected. Replace the encoder cable.
An zero point error occurred. Replace the servomotor.
An encoder fault occurred.
Voltage
error Power was
turned ON. The AC power supply voltage
exceeded the permissible
range. Make sure the AC power volt-
age is within the specified
range.
The power supply was turned
ON again before the power
supply to the SERVOPACK was
completely OFF. Wait until the REF indicator is
OFF, and turn ON the power
supply again.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Normal opera-
tion. The AC power supply voltage
exceeded the permissible
range. Make sure the AC power volt-
age is within the specified
range.
The servomotor speed is high
and load moment of inertia is
excessive. Reconsider the load and opera-
tion conditions.
The regenerative unit is not
connected or the selection of
the regenerative unit is wrong. Calculate the regenerative
energy and connect a regenera-
tive unit with sufficient process-
ing capacity.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Alarm
Display
Alarm
Name
Conditions at
Alarm Occur-
rence
Cause Corrective Action
AL1
AL2
AL3
AL1
AL2
AL3