Inovance IS620P Series Manual

5 Troubleshooting
5
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Er.920: Regenerative resistor overload
Cause Conrming Methods Corrective Action
1. Wiring of external regenerative
resistor is in poor connection,
becomes loose or breaks.
Disconnect external regenerative
resistor and measure whether
resistance of the resistor is ∞.
Measure whether resistance between
P
and C is ∞.
Replace a new external regenerative
resistor and measure its resistance.
If the resistance is consistent with
nominal value, connect it between
P
and C.
Select a new cable and connect it
between
P
and C.
2. Jumper across terminals P
and D is shorted or disconnected
when the internal regenerative
resistor is used.
Measure whether resistance between
P
and D is ∞.
Select a new cable and connect it
between
P
and D.
3. Setting of H02-25 is incorrect
when external regenerative
resistor is used.
View setting value of H02-25.
Measure resistance of external
regenerative resistor connected
between
P
and C. Check whether
the resistance is too large by
comparing it with the regenerative
resistor specication table in the
IS620P User Manual.
Check whether setting value of
H02-27 is greater than resistance
of external regenerative resistor
connected between
P
and C.
Set H02-25 correctly according to the
IS620P User Manual.
H02-25 = 1 (external regenerative
resistor used, naturally ventilated)
H02-25 = 2 (external regenerative
resistor used, forcible cooling)
4. Resistance of the used
external regenerative resistor is
too large.
Select a proper regenerative resistor
according to the IS620P User Manual.
5. H02-27 (resistance of external
regenerative resistor) is larger
than resistance of the used
external regenerative resistor.
Set H02-27 (resistance of external
regenerative resistor) consistent with
the resistance of the selected external
regenerative resistor.
6. Input voltage of main circuit
exceeds specication.
Check whether input voltage of main
circuit on servo drive side satises
the following specication:
220 V AC drive:
Valid value: 220 to 240 V
Allowed error: -10% to 10% (198 to
264 V)
380V AC drive:
Valid value: 380 to 480 V
Allowed error: -10% to 10% (342 to
528 V)
Replace power supply or adjust power
voltage according to specication on
the left.
7. The load inertia is too large.
Perform inertia auto-tuning according
to the IS620P User Manual or
calculate total inertia of machine
according to mechanical parameters.
Check whether actual load inertia
ratio exceeds 30.
Select a large external regenerative
resistor and set H02-26 (power
of external regenerative resistor)
consistent with actual value.
Select a large servo drive.
If allowed, reduce the load.
If allowed, increase acceleration/
deceleration time.
If allowed, increase motor running
cycle.
8. Speed is too high, and
deceleration is not completed
within required time. The
regenerative resistor is in
continuous deceleration status.
View speed curve of motor for cycle
running and check whether motor
is in deceleration status for a long
period.
9. Capacity of servo drive
or regenerative resistor is
insufcient.
View single cycle speed curve
of motor and calculate whether
maximum braking energy can be
absorbed completely.

Inovance IS620P Series Specifications

General

Brand	Inovance
Model	IS620P Series
Category	Servo Drives
Language	English