Chapter 7 Troubleshooting
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Encoder break detection
(Alarm clear: not available)
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Description
This alarm occurs when the encoder signal ceases (primarily, encoder break is detected). 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 improperly wired,
or encoder may be broken.
⇒
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 during running (recovers when the actuator cooled down)
◆
Cause 1: Encoder malfunctions when the actuator temperature rises.
⇒
Remedy: Review the actuator operating load, duty cycle, and its cooling system.
Encoder reception error
(Alarm clear: not available)
●
Description
This alarm occurs when the driver fails to receive data from encoder. The alarm also occurs when the
driver fails to output the encoder signal. To release the alarm after troubleshooting, shut off the control
power and turn it on again.
●
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) Temporally alarm occurs during 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.
Содержание HA-680 Series
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