Omron R88D-GT series

8-10
8-3 Troubleshooting
8
Troubleshooting
18
Regeneration
overload
Occurs when the Servo-
motor is decelerating.
• Load inertia is too
great.
• Calculate the
regenerative energy,
and connect an
External Regeneration
Resistor with the
required regeneration
absorption capacity.
• Extend the
deceleration time.
• The deceleration time
is too short.
• The Servomotor
rotation speed is too
high.
• Reduce the Servomo-
tor rotation speed.
• Extend the
deceleration time.
• Calculate the
regenerative energy,
and connect an
External Regeneration
Resistor with the
required regeneration
absorption capacity.
• The operating limit of
the External Regener-
ation Resistor is limit-
ed to 10%.
• Set Pn6C to 2.
For details, refer to
Parameters Details on
page 5-51.
Occurs during descent
(vertical axis)
• Gravitational torque is
too large.
• Add a counterbalance
to the machine to
lower gravitational
torque.
• Reduce the descent
speed.
• Calculate the
regenerative energy
and connect an
External Regeneration
Resistor with the
required regeneration
absorption capacity.
• The operating limit of
the External Regener-
ation Resistor is limit-
ed to 10%.
• Set Pn6C to 2.
For details, refer to
Parameters Details on
page 5-51.
21
Encoder
communications error
Occurs during operation.
• The encoder is
disconnected.
• Connector contacts
are faulty.
• Fix the locations that
are disconnected.
• Correct the wiring.
• The encoder wiring is
incorrect.
• Correct the wiring
• The encoder is dam-
aged.
•
Replace the Servomo-
tor.
• T
he Servo Drive is
faulty.
•
Replace the Servo
Drive.
• The Servomotor is
mechanically being
held.
• If the Servomotor
shaft is held by
external force, release
it.
Alarm
code
Error Status when error occurs Cause Countermeasure