Inovance SV820N Series - Page 113

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5 Troubleshooting
5
Probable Cause ConrmingMethod Corrective Action
2. The setting of H02-25 is incorrect
when the external bleeder resistor
is used.
View the setting value of H02-25.
Measure the resistance of the
external resistor between P and
C, and compare it with the bleeder
resistorspecicationtableinSection
6.1.7.
Checkwhetherthesettingvalueof
H02-27 is larger than the resistance
of the bleeder resistor between P
and C.
SetH02-25correctly:
H02-25=1 (external, naturally
ventilated)
H02-25=2 (external, forcible cooling)
3. The resistance of the external
bleeder resistor used is too large.
Select a proper bleeder resistor
according to the bleeder resistor
specicationtableinSection6.1.7.
4. H02-27 (resistance of external
bleeder resistor) is larger than the
resistance of the external bleeder
resistor actually used.
Set H02-27 according to the resistance
of the external bleeder resistor actually
used.
5. The input voltage of the main
circuitexceedsthespecications.
Checkwhethertheinputvoltage
ofthemaincircuitsatisesthe
followingspecications:
220Vdrive:
Effectivevalue:220Vto240V
Allowederror:–10%to+10%(198V
to 264 V)
380Vdrive:
Effectivevalue:380V–440V
Allowederror:–10%to+10%(342V
to 484 V)
Replace or adjust the power supply
accordingtothespecicationsonthe
left.
6. The load rotor inertia is too large.
Perform inertia auto-tuning
according to "inertia auto-tuning,"
or calculate the total inertia of the
machine manually according to the
mechanical parameters.
Checkwhethertheactualload
inertia ratio exceeds 30.
Select a large external bleeder resistor
and set H02–26 consistent with the
actual value.
Select a larger servo drive.
If allowed, reduce the load.
If allowed, increase the acceleration/
deceleration time.
If allowed, increase the motor running
cycle.
7. The motor speed is very high,
resulting in an incomplete
deceleration within the required
time. The motor is in continuous
deceleration status in cyclic
running.
View the motor speed curve in cycle
runningandcheckwhetherthe
motor is in the deceleration status
for a long period.
8. The capacity of the servo drive or
bleederresistorisinsufcient.
View the motor's single cycle speed
curve and calculate whether the
maximumbrakingenergycanbe
absorbed completely.
9. The servo drive is faulty. - Replace the servo drive.
■ E3.922: External bleeder resistor is too small.
Cause:
H02-27 (resistance of external bleeder resistor) is smaller than H02-21 (permissible minimum resistance of
external bleeder resistor).
Probable Cause ConrmingMethod Corrective Action
When the external bleeder
resistor (H02-25=1 or 2) is used,
its resistance is smaller than the
permissible minimum resistance
required by the servo drive.
Measure the resistance of
the external bleeder resistor
betweenPandCandcheck
whether it is smaller than H02-
21.
If yes, connect an external bleeder resistor
matching the servo drive between P and C
and set H02-27 (resistance of external bleeder
resistor) to the actual value.
If not, set H02-27 to the actual value of the
external bleeder resistor.