Product specifications

Chapter 1 Outlines of the HA-680 driver
HA-655_V4 - 13 -
Encoder break detection
This alarm occurs when the signal from the encoder is lost. To reset the alarm, you must shut down the
power and turn it on again after diagnosing the cause.
Encoder reception error
This alarm occurs when data cannot be received from the encoder successfully, or encoder signal output
cannot be performed.
UVW error
The alarm occurs when the encoder UVW signals are abnormal. To reset the alarm, you must shut
down the power and turn it on again after diagnosing the cause.
To clear the alarm after troubleshooting, shut off the control power once and turn it on again.
Regenerative error
The alarm occurs when the voltage of the main circuit exceeds 50 V. If the moment of inertia of the load
is large, the main circuit voltage increases due to the energy generated during deceleration of the
actuator.
The regenerative resistance of the regenerative absorption circuit incorporates a fuse. When the
temperature of the regenerative resistance increases due to excessive regeneration and the fuse is
blown, the regenerative circuit no longer works, and the main circuit voltage increases. If the
regenerative error occurs immediately the control circuit power is shut down and turned on again, it may
be due to a blown fuse. In this case, connect the external regenerative resistance and switch the jumper
setting.
For connection of an external regenerative resistance and change of the jumper setting, refer to 3-8.
Operating temperature error
The alarm occurs when the temperature of the HA-680 main unit increases and the temperature sensor
trips. To reset the alarm, you must shut down the power and turn it on again after diagnosing the cause.
System error
This alarm occurs when an error of the motor current detection circuit is detected. To reset the alarm,
you must shut down the power and turn it on again after diagnosing the cause.
Overcurrent
This alarm occurs when overcurrent is detected by the motor current detection circuit. To reset the alarm,
you must shut down the power and turn it on again after diagnosing the cause.
Load short circuit
The alarm occurs when excessive current flows through the FET. To reset the alarm, you must shut
down the power and turn it on again after diagnosing the cause.
Memory error
The alarm occurs when read/write fails due to failure of the EEPROM memory of the driver. It can be
reset by shutting down the power and turning it on again. However, if the same phenomenon persists, it
may be due to failure. Contact one of our branch offices.
Overspeed
The alarm occurs when the rotation speed of the actuator exceeds the motor axis maximum rotation
speed +100 rpm for 0.5 s or longer. To clear the alarm, shut off the control power once and turn it on
again.