Inovance SV820N Series, Manual

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5 Troubleshooting
5
Probable Cause Confirming Method Corrective Action
3. Acceleration/deceleration
is too frequent or the load
inertia is too large.
Check the mechanical inertia ratio or
perform the inertia auto-tuning. Then
view 2008-10h (load inertia ratio).
Check the single running cycle when
the servo motor runs circularly.
Increase the acceleration/deceleration
time.
4. The gain is improper, or the
stiffness is too high.
Check whether the motor vibrates
and produces abnormal noise during
running.
Re-adjust the gain.
5. The servo drive or motor
model is set incorrectly.
View the bus motor model in 2000-06h
and servo drive model in 2001-0Bh.
View the servo drive nameplate and
set the servo drive model in 2001-0Bh
correctly and use a matching servo
motor according to Section 2.3.
6. Locked-rotor occurs due to
mechanical factors, resulting
in very heavy load during
running.
Check the running reference and motor
speed (200B-01h) through Inovance
servo commissioning software or
keypad:
Running reference in position control:
200B-0Eh
(Input position reference counter)
Running reference in speed mode:
200B-02h
(Speed reference)
Running reference in torque mode:
200B-03h
(Internal torque reference)
Check that the running reference is not
0 or very large but the motor speed is 0
in corresponding mode.
Eliminate mechanical factors.
7. The servo drive is faulty. Power off and on the servo drive.
Replace the servo drive if the fault
persists after the servo drive is powered
on again.
■ E3.920: Bleeder resistor overload
Cause:
The accumulative heat of the bleeder resistor exceeds the setting value.
Probable Cause Confirming Method Corrective Action
1. The cable of the external bleeder
resistor is in poor connection,
becomes loose or breaks.
Disconnect the external bleeder
resistor and measure whether the
resistance is "∞".
Measure whether the resistance
between P and C is "∞".
Use a new external bleeder resistor. If
the resistance measured is the same
as the nominal value, connect the
bleeder resistor between P and C.
Connect the external bleeder resistor
between P and C with a new cable.