Inovance SV820N Series - Page 112

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5 Troubleshooting
5
Probable Cause Conrming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 Conrming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.