Yaskawa Junma Series SERVOPACK - Manual (Page 80)

6.2 Troubleshooting for Malfunctions when Alarm Indicators Are Not Lit
E-79
English
6.2 Troubleshooting for Malfunctions when Alarm Indicators Are Not Lit
Troubleshooting for malfunctions that occur with the servomotor even though the alarm indicators do not light are
listed below. Perform the appropriate corrective actions accordingly.
: Take corrective actions for the shaded items only after turning the servo system OFF.
Problem Cause Inspection Items Corrective Action
PWR indica-
tor does not
light when
power is
turned ON. The wiring of the power
cable is incorrect. Check the power supply to
be sure it is within the per-
missible voltage range. Set the power supply input
within the permissible power
supply voltage range.
Check the wiring of the
power supply input. Correct the wiring.
The wiring of the regenera-
tive unit is incorrect. Check the connection cable
for the regenerative unit is
correctly wired. Replace the SERVOPACK
and the regenerative unit,
and correct the wiring.
Servomotor
does not
rotate for ref-
erence input
from the con-
troller. The servo ON (/S-ON) input
is OFF. Check to see if the REF indi-
cator is lit green. Turn ON the servo ON signal
or wire the servomotor cor-
rectly if the REF indicator is
lit orange.
The reference pulse settings
are incorrect. Check to see if the REF
indicator is flashing. Wire the servomotor correctly
or set the pulse type of the
SERVOPACK according to
the reference pulse type of
the controller if the REF
indicator is not lit.
Check the reference pulse
types of the controller and
the SERVOPACK. Set the pulse type of the
SERVOPACK according to
the reference pulse type of
the controller.
The wiring of the servomotor
main circuit cable is
incorrect. Check the wiring. Correct the wiring.
The wiring of the encoder
cable is incorrect
The wiring of the I/O signal
(connector CN1) is incorrect.
Check the wiring of the refer-
ence pulse. Correct the wiring.
Check the reference pulse
type. Set the pulse type of the
SERVOPACK according to
the reference pulse type of
the controller.
Check the voltage of the
reference pulse. Connect a resistor according
to the voltage.
The power is not turned ON. Check the power supply and
the status of PWR indicator. Turn ON the power.
Check the voltage between
the power supply terminals. Correct the power ON circuit.
Both CW input and CCW
input are ON simultaneously. Check the wiring of the
reference pulses. • Input either the CW pulse
signal or CCW pulse signal.
• Be sure to turn OFF all
terminals with no input
signals.
A SERVOPACK fault
occurred. − Replace the SERVOPACK.