SD710 Series Servo Drive User Manal Chapter 10 Troubleshooting
18
the maximum energy
cannot be completely
absorbed.
/B2.
6. The maximum braking
energy exceeds the
absorbable value when
the motor is running with
a sharp deceleration
condition.
◆
Confirm the deceleration time in
operation, measure the DC bus voltage
between P/N, and confirm whether the
voltage exceeds the fault value during the
deceleration section
Ensure that the main circuit input
voltage is within its specification
and increase the deceleration
time where this is allowed.
7. The measured value of
bus voltage has a large
deviation.
◆
Measure if the DC bus voltage value
between P/N matches the value of Un140.
Ask our technical support.
8. In the above allowable
inertia ratio state
Run under.
◆
Verify that the rotational inertia ratio is
operating within the allowable rotational
inertia ratio.
Extend the deceleration time or
reduce the load.
9. Servo failure.
◆
After reapplying power to the main
circuit after several power failures, the
fault is still reported.
Replace the servo.
Reason
The dc bus voltage between P /- is below the fault value.
AC220V Drivers: normal value 310V, fault value 180V.
AC380V Drivers: normal value 540V, fault value 380V.
Treatment.
Reasons
Confirmation method
Handling measures
1. The main circuit power
supply is unstable or a
momentary power failure
occurs.
◆
Check the input power specifications and
measure the input voltage on the side of the
main circuit (L1, L2, L3) for compliance with
the following specifications.
AC220V
Valid values: 220V - 240V
Allowable deviation: ± 10% (196V-264V)
AC380V
Valid values: 380V-440V
Allowable deviation: ± 10% (342V-484V)
Refer to the specifications on
the left and replace or adjust
the input power supply.
2. The supply voltage
drops during operation.
◆
Detect the power supply voltage on the
input side of the and check whether the
main circuit supply power is excessive,
resulting in insufficient power supply capacity
and voltage drop.
Replace or adjust the input
power supply.
3. The power supply is out
of phase and, which
should be fed with three-
phase power to run, is
actually fed with single-
phase power.
◆
Check that the main circuit wiring is
correct and reliable.
Replace the cable and
connect the main circuit power
cable correctly to.
Three phases: L1, L2, L3
Single phase: L1, L2
4. Large deviations in
measured busbar voltage
values.
◆
Measure that the DC bus voltage value
between P /N corresponds to the value of
Un140.
Ask our technical support.
5. Servo failure.
◆
The fault is still reported when the main
circuit power is turned back on after repeated
power down.
Replace the servo.
