M2DC Series Hardware Manual
164
Rev. 1.1
2018/04
400-820-9661
10.2 Drive alarm causes and solutions
LED display
Description
Alarm type
Processing method
Drive over
temperature
Temperature of the heat sink or power
device has been risen over the specified
temperature.
1. Ambient temperature has risen over
the specified temperature.
2. Over-load
1. Improve the ambient temperature and
cooling condition.
2. Increase the capacity of the driver
and motor. Set up longer acceleration/deceleration
time. Lower the load
Internal voltage
fault
Drive internal voltage failure.
1. Please check supply power voltage
2. Please replace the drive with a new one, and
contact MOONS
Over voltage
Drive DC bus voltage is too high
M2DC series : Higher than 90VDC
1. Power supply voltage has exceeded the
permissible input voltage.
2. Disconnection of the regeneration
discharge resistor
3. External regeneration discharge
resistor is not appropriate and could not
absorb the regeneration energy.
4. Failure
1. Enter correct voltage.
2. Measure the resistance of the internal
regeneration resistor.
3. please measure the external resistor, Replace
the external resistor if the value is ∞.
4. Please contact MOONS or replace the driver
with a new one.
Over current
1. Failure of servo driver (failure of the
circuit, IGBT or other components)
2. Short of the motor wire (U, V and W)
3. Burnout of the motor
4. Poor contact of the motor wire.
5. Input pulse frequency is too high.
6. Motor is over load, command output
torque is larger than maximum torque, for a
long operating time.
7. Poor gain adjustment cause motor
vibration, and abnormal nosie.
8. Machine has collided or the load has
gotten heavy. Machine has been distorted.
9. Welding of contact of dynamic braking
relay due to frequent servo ON/OFF
operations.
1. Turn to Servo-ON, while disconnecting the
motor. If error occurs immediately, replace
with a new driver.
2. Check that the motor wire (U, V and W) is not
shorted, and check the branched out wire out of
the connector. Make a correct wiring connection.
3. Measure the insulation resistance between
motor wires, U, V and W and earth wire. In case of
poor insulation, replace the motor.
4. Check the balance of resister between each
motor line, and if unbalance is found, replace the
motor.
5. Check the loose connectors. If they are, or
pulled out, fix them securely.
6. Adjust gain value settings.
7. Measuring brake voltage
8. Check drive and motor encoder and power
wires.
9. please contact MOONS.
Bad hall sensor
Hall sensor fault
1. please check encoder connection
2. please check your drive motor configurations.
Encoder error
Encoder signal fault
please check encoder connection.
Position error
Position error value exceeds the position
error range set by parameter P-44 (PF).
1. Please check parameter P-44 (PF).
2. Please check drive gain value settings.
3. Please check the load factor of the regeneration
resistor, increase the capacity of the driver and the
motor, and loosen the deceleration time
Low voltage
1. Power supply voltage is lower than
12VDC. Instantaneous
power failure has occurred
2. Lack of power capacity...Power supply
voltage has fallen down due to inrush
current at the main power-on.
3. Failure of servo driver (failure of the
circuit)
1. Increase the power capacity. Change the power
supply.
2. please check power input connections . Please
refer to 4.1.4 drive power connection
3. please contact MOONS
