Delta ASD-B2-0121-B User Manual page 275

Chapter 10 Troubleshooting
: Motor error
Potential Cause
Encoder is damage. Check Encoder for the damage.
Encoder is loose.
The type of the
servo motor is
incorrect.
: Regeneration error
Potential Cause
Regenerative
resistor is not
connected.
Regenerative switch
transistor fault
Parameter setting is
in error
: Overload
Potential Cause
The drive has
exceeded its rated
load during
continuous
operation.
Control system
parameter setting is
incorrect.
The wiring of drive
and encoder is in
error.
: Overspeed
Potential Cause
Speed input
command is not
stable (too much
fluctuation).
Over-speed
parameter setting is
defective.
10-4
Checking Method
Examine the Encoder connector.
Check if the servo drive and servo motor
are not correctly matched for size (power
rating).
Checking Method
Check the wiring connection of
regenerative resistor.
Check if regenerative switch transistor is
short-circuited.
Confirm the parameter setting and
specifications of regenerative resistor.
Checking Method
Check if the drive is overloaded.
Check if there is mechanical vibration
Accel/Decel time setting is too fast.
Check the wiring of U, V, W and encoder. Ensure all wiring is correct.
Checking Method
Use signal detector to detect if input
signal is abnormal.
Check if over-speed parameter setting
value is too low.
Corrective Actions
Repair or replace the motor.
Install the motor again.
Replace the motor.
Corrective Actions
Reconnect regenerative
resistor.
Please contact your distributor
for assistance or contact with
Delta.
Correctly reset parameter
again.
Corrective Actions
Increase motor capacity or
reduce load.
Adjust gain value of control
circuit.
Decrease Accel/Decel time
setting.
Corrective Actions
Ensure that input command
frequency is stable (not
fluctuate too much) and
activate filter function (P1-06,
P1-07 and P1-08).
Correctly set over-speed
parameter setting (P2-34).
Revision June 2010