Chapter 8 Troubleshooting
HA-675_V3_02
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Send data rule error ABS
(alarm clear: impossible)
●
Description
This alarm occurs when the absolute encoder rotates more than 127 resolvable pulses by external
torque during transmitting absolute data.
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Diagnostic
tips
(1) Alarm occurs when the control power is turned on:
◆
Cause 1: The output axle of the actuator is activated during execution of the data request.
⇒
Remedy: Shut off the control power once and turn it on again.
◆
Cause 2: 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 3: The control circuit of the HA-675 driver may have failed.
⇒
Remedy: Contact Harmonic Drive Systems. (Replace the HA-675 driver)
◆
Cause 4: The encoder circuit may have failed.
⇒
Remedy 1: Contact Harmonic Drive Systems. (Replace actuator)
⇒
Remedy 2: Input “CN2-30 multi-revolution data clear: ABS-CLR” signal for 4 seconds or
more. Then, shut off the power and turn it on again.
Error counter overflow
(alarm clear: possible)
●
Description
The alarm occurs when an error count exceeds the set value in [parameter mode]
→
[6: position error
allowance]. It is possible to clear the alarm by inputting ON signal to [CN2-2
clear: CLEAR]. The
error count is reset simultaneously.
●
Diagnostic
tip
(1) Alarm occurs when the control power is turned on:
◆
Cause 1: The control circuit of the HA-675 driver may have failed.
⇒
Remedy: Contact Harmonic Drive Systems. (Replace the HA-675 driver)
(2) Alarm occurs during acceleration or deceleration
◆
Cause 1: Gain is too low
⇒
Remedy: Adjust gains [parameter mode]
→
[0: speed loop gain], [1: speed loop integral
compensation] and [2: position loop gain].
◆
Cause 2: The load inertia is too large
⇒
Remedy1: Reduce the load inertia.
⇒
Remedy2: Modify the motion profile to accelerate and decelerate more slowly.