Chapter 7 Troubleshooting
H
- 115 -
UVW error
(Alarm clear: not available)
●
Description
The alarm occurs when the encoder UVW signals are abnormal. To release the alarm after
troubleshooting, shut off the control power and turn it on again.
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Diagnostic tips
(1) Alarm occurs when the control power is turned on:
◆
Cause 1: The encoder connector (CN1) may not be connected or may be connected poorly.
⇒
Remedy: Verify connection of encoder connector (CN1) and connect it firmly.
◆
Cause 2: The encoder circuit may have failed.
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace actuator)
◆
Cause 3: The control circuit of the HA-680 driver may have failed.
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace the HA-680 driver)
(2) Alarm occurs temporarily while running:
◆
Cause 1: Malfunction may be caused by surrounding electrical noise.
⇒
Remedy: Install the driver correctly referring [Chapter 3-4: Suppressing noise] in this
manual.
Regenerative error
(Alarm clear: not available)
●
Description
The alarm occurs when the voltage of the main circuit exceeds 50 V. If the load inertia is large, the main
circuit voltage increases due to the energy generated during deceleration of the actuator. This alarm
can be cleared by shutting down the control circuit power and turning it on again. However, this alarm
may occur every time under the same load conditions. Connect a regenerative resistance to the
external regenerative resistance connection terminal, or extend the acceleration/ deceleration time. If a
regenerative resistance is connected, you must switch the regenerative resistance switching jumper to
the external side.
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 an external regenerative resistance and switch the jumper
setting.
●
Diagnostic tips
(1) Alarm occurs while the motor is running:
◆
Cause 1: The load inertia is too large.
⇒
Remedy 1: Connect an external resistance or capacitor according to “3-8 Connecting
regenerative absorption resistances/capacitors” in this manual.
⇒
Remedy 2: Extend the deceleration time.
⇒
Remedy 3: Lower the maximum speed.
⇒
Remedy 4: Reduce the load inertia.
◆
Cause 2: Failure of the overload detection circuit.
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace the HA-680 driver)
Содержание HA-680 Series
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