5 Troubleshooting
5
- 47 -
Cause
Confirming Methods
Corrective Action
3. The regenerative
resistor fails.
If internal regenerative resistor is used
(H02-25 = 0), check whether
P
and D
are connected with a cable reliably. If
yes, measure resistance between C and
D.
If external regenerative resistor is used
(H02-25 = 1/2), measure resistance
between
P
and C.
For regenerative resistor specification,
refer to Chapter 1.
If resistance is ∞, wire breaking occurs.
If internal regenerative resistor is used and
resistance is 0, use external regenerative resistor
(H02-25 = 1/2) and remove cable between
P
and D. Select external regenerative resistor
of the same resistance and power as internal
regenerative resistor.
If external regenerative resistor is used, connect
a new regenerative resistor between
P
and C.
Make H02-26 (power of external regenerative
resistor) and H02-27 (resistance of external
regenerative resistor) consistent with external
regenerative resistor specification.
Resistance of
the regenerative
resistor is too
large, and energy
absorption
during braking is
insufficient.
Measure resistance of the external
regenerative resistor between
P
and C.
Compare the measured value with the
recommended value.
Connect a new external regenerative resistor of
recommended resistance between
P
and C.
Make H02-26 (power of external regenerative
resistor) and H02-27 (resistance of external
regenerative resistor) consistent with external
regenerative resistor specification.
Motor is in abrupt
acceleration/
deceleration status.
Maximum braking
energy exceeds
energy absorption
value.
Confirm acceleration/deceleration time
during running and measure DC bus
voltage between
P
and
-
. Check
whether voltage exceeds fault level
during deceleration.
First, ensure that input voltage of main circuit
is within specification. Then increase/decrease
acceleration/deceleration time in allowed range.
Bus voltage
sampling value has
a large deviation
from the measured
value
Check whether H0B-26 (bus voltage) is
within the following specification:
220 V drive: H0B-26 > 420 V
380 V drive: H0B-26 > 760V
Measure the DC bus voltage between
P
and
-
. Check whether the DC bus
voltage is normal and smaller than H0B-
26.
Contact Inovance for technical support.
7. The servo drive
is faulty.
The fault persists after main circuit is
powered on several times.
Replace the servo drive.
Summary of Contents for IS650P Series
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