User manual

15 Alarms and warnings
−129−
Cause Action
The internal temperature of the driver exceeded approx.
85°C (185 °F).
Review the ventilation condition in the enclosure.
The motor temperature reached approx. 85°C (185 °F). • Check the heat dissipation condition of the motor.
• Review the ventilation condition of the surroundings.
A torque exceeding the rated torque was applied. • Reduce the load or increase the acceleration/deceleration
time.
• Check the cable connection.
• Check if the electromagnetic brake is released during
operation.
The detected motor speed exceeded 6000 r/min. • Keep the speed of the motor output shaft to not more than
5500 r/min.
• If the speed is overshooting due to insufficient gain
adjustment, readjust the gain.
The command pulse frequency exceeded the specified value. • Set the command pulse frequency to 500 kHz or less.
• Check the electronic gear setting and reduce the speed of
the motor out
p
ut shaft to 5500 r/min or less.
• The regeneration unit is not connected correctly.
• The regeneration unit is overheating.
• The heat sink is overheating.
• If an external regeneration unit is connected, connect the
thermostat outputs of the regeneration unit correctly to the
regeneration resistor thermal input terminals (TH1 and TH2
terminals of CN1).
• If the internal regeneration resistor is used, short the
regeneration resistor thermal input terminals (TH1 and TH2
terminals of CN1).
• The current consumption of the regeneration unit/resistor
exceeds the allowable level. Review the load condition and
operating conditions.
• Check if the built-in cooling fan operates (for the NXD75-S
only).
• 200-230 VAC was applied to a product specified for
100-115 VAC.
• A large inertial load was stopped abruptly, or up/down
operation was performed without connecting a regeneration
unit.
• The regeneration unit is not connected correctly.
• The DC voltage of the main power supply became approx.
400 V or higher.
• Check the input voltage of the main power supply.
• If this alarm generates during acceleration/deceleration, the
current consumption of the regeneration unit/resistor may
have exceeded the allowable level. Review the load
condition and operating conditions.
• If the internal regeneration resistor is used, switch to an
external regeneration unit.
The motor was started when the main power was cut off. Check if the main power is input properly.
The main power was cut off momentarily or the voltage
became low.
Check the input voltage of the main power supply.
• The deviation between the command position and actual
position at the motor output shaft exceeded the value set in
the excessive position deviation alarm parameter
[APP-3-00]. (Initial value: 10 rev)
• The load is large or the acceleration/deceleration time is
short.
• Reduce the load or increase the acceleration/deceleration
time.
• If the torque limit function is used, increase the torque limit
value.
The motor, cable or driver output circuit was shorted. Turn off the power and check the motor, cable and driver
output circuit for shorting, and then turn the power back on.