Omron R88M-1M Series User Manual page 776

12 Troubleshooting
Symptom
The Servomotor The value set in Motor Rota-
rotates in the reverse tion Direction Selection
direction from the (3000-01 hex) is incorrect.
command.
The command given by the
host controller is incorrect.
The Servomotor power cable is
wired incorrectly.
When the runaway The value set in Motor Rota-
detection function is
tion Direction Selection
enabled, the
(3000-01 hex) is incorrect.
Servomotor rotates in
The command given by the
the reverse direction
host controller is incorrect.
from the command.
The Servomotor power cable is
wired incorrectly.
The Servomotor power cable is
wired incorrectly, and condi-
tions under which the runaway
detection function cannot work
are satisfied.
The holding brake Power is supplied to the hold-
does not work. ing brake.
The applied timing for The set value of Brake Inter-
the holding brake is lock Output (4610 hex) does
early. not match the machine.
Motor rotation is The motor power cable or
unstable. encoder cable is wired incor-
rectly.
Low rigidity is causing vibration. Measure the vibration fre-
The load's moment of inertia
exceeds the Servo Drive's
allowable value.
Loose joint and/or large clear-
ance with the machine.
The load and gain do not
match.
12 - 44
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User's Manual (I586)
Probable cause
Check the value of Motor
Rotation Direction Selection.
• The size of the absolute com-
• The polarity of an incremen-
Check the wiring.
Check the value of Motor
Rotation Direction Selection.
• The size of the absolute com-
• The polarity of an incremen-
Check the wiring.
Check to see if power is sup-
plied to the holding brake.
Review the setting of Brake
Interlock Output (4610 hex).
Check the unit version of the
Servo Drive. The default setting
of Brake Interlock Output -
Threshold Speed at Servo
OFF (4610-03 hex) is large for
the unit version Ver.1.4 or later.
Check the wiring of the motor
power cable's phases U, V, W
and check the encoder cable's
wiring.
quency of the load.
Calculate the load inertia.
Check the joint with the
machine.
Check the response waveforms
for speed and torque.
Check items
mand is set incorrect.
tal command is set incorrect.
mand is set incorrect.
tal command is set incorrect.
Measures
Change the value of Motor
Rotation Direction Selection.
• Check the actual and target
values.
• Check the rotation direction.
Wire correctly.
Change the value of Motor
Rotation Direction Selection.
• Check the actual and target
values.
• Check the rotation direction.
Wire correctly.
• Check the Brake Interlock
Output (BKIR) signal and the
relay circuit.
• Check to see if the holding
brake is worn down.
Adjust Brake Interlock Out-
put (4610 hex).
Wire correctly.
Enable the damping control.
Set the damping filter fre-
quency.
• Check if manual tuning can
achieve proper adjustment.
• Increase the Servomotor
capacity.
Remove the joint looseness
with the machine.
Perform the tuning again to sta-
bilize the rotation.