Chapter 7 Troubleshooting
H
- 118 -
Load short circuit
(Alarm clear: not available)
●
Description
The alarm occurs when excessive current flows through the FET. To release the alarm after
troubleshooting, shut off the control power and turn it on again.
●
Diagnostic tips
(1) Alarm occurs when the control circuit power is turned on:
◆
Cause 1: Failure of the control circuit of the HA-680 driver
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace the HA-680 driver)
(2) Alarm occurs at an input (ON) of the input signal “CN2-7: Servo on”:
◆
Cause 1: Failure of the main circuit or control circuit of the HA-680 driver
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace the HA-680 driver)
(3) Alarm occurs by input signal of [CN2-7: S-ON (servo-ON)] is activated, but doesn’t
occur when the input signal is ON and the motor cable (U, V, W) is disconnected:
◆
Cause 1: Short connection in the motor cable
⇒
Remedy: Verify the connection of the motor cable and correct it or replace it if
necessary.
◆
Cause 2: Short connection in the motor winding
⇒
Remedy: Contact Harmonic Drive Systems,Inc. (Replace actuator)
(4) Alarm occurs during acceleration or deceleration:
◆
Cause 1: Excessive load inertia and the accelerating or decelerating time is too short.
⇒
Remedy 1: Reduce the load inertia.
⇒
Remedy 2: Set longer times for [parameter]
→
[33: acceleration time constant] and [34:
deceleration time constant].
◆
Cause 2: Gain is set too high or too low
⇒
Remedy 1: Adjust gains in [parameter]
→
[00: position loop gain], [01: Speed loop
proportional gain], [02: speed loop integral gain] and [03: Speed loop
derivative gain] proportional according to the load.
(5) The alarm occurs while running (it is possible to restart after 4 to 5 minutes):
◆
Cause 1: Running at over load state
⇒
Remedy: Review the actuator’s actual load profile to lower the duty.
◆
Cause 2: Ambient temperature of the HA-680 driver is more than 50
°
C.
⇒
Remedy: Review the driver’s installation and it’s cooling system.
Содержание HA-680 Series
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