
-316-
9 Troubleshooting
Root Cause
Confirming Method
Solution
3. The regenerative
resistor fails.
If an internal regenerative resistor is used
(2002-1Ah = 0), check whether P and D are
jumpered. If yes, measure the resistance
between C and D.
If an external regenerative resistor is used
(2002-1Ah = 1, 2), measure the resistance
between P and C.
For the specification of the regenerative
resistor, see
◆
If the resistance is " ∞ " (infinite), the
regenerative resistor is disconnected
internally.
◆
If an internal regenerative resistor is used,
replace with an external regenerative
resistor (2002-1Ah = 1, 2) and remove
the jumper between P and D. Select an
external regenerative resistor of the same
resistance and power as the internal one.
◆
If an external regenerative resistor is used,
replace with a new external regenerative
resistor and connect it between P and C.
Set 2002-1Bh (Power of external regenerative
resistor) and 2002-1Ch (Resistance of external
regenerative resistor) properly according to
the specifications of the external regenerative
resistor used.
4. The resistance
of the external
regenerative resistor
is too large, and
energy absorption
during braking is
insufficient.
Measure the resistance of the external
regenerative resistor between P and C,
and compare the measured value with the
recommended value.
Connect a new external regenerative resistor of
recommended resistance between P and C.
Set 2002-1Bh (Power of external regenerative
resistor) and 2002-1Ch (Resistance of external
regenerative resistor) properly according to
the specification of the external regenerative
resistor actually used.
5. The motor is in
abrupt acceleration/
deceleration status
and the maximum
braking energy
exceeds the energy
absorption value.
Confirm the acceleration/deceleration time
during running and measure whether the DC
bus voltage between P and N exceeds the
fault threshold during deceleration.
Ensure the voltage input to the main circuit is
within the specified range, and then increase
the acceleration/deceleration time if allowed.
6. The bus voltage
sampling value
deviates greatly from
the measured value.
Check whether the bus voltage (200B-1Bh)
complies with the following specifications:
220 V servo drive: 200B-1Bh > 420 V
380 V servo drive: 200B-1Bh > 760 V
Measure whether the DC bus voltage
between P and N is within the normal range
and smaller than the value defined by
200B-1Bh.
Contact Inovance for technical support.
7. The servo drive is
faulty.
The fault persists after main circuit is
powered off and on several times.
Replace the servo drive.
■
E410.0: Main circuit undervoltage
Direct cause:
The DC bus voltage between P and N is lower than the undervoltage threshold.
220 V servo drive:
Normal value: 310 V
Undervoltage threshold: 200 V