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Chapter 10 Troubleshooting|ASDA-AB Series
10-4 Revision January 2009
: Regeneration error
Potential Cause Checking Method Corrective Actions
Regenerative resistor is
not connected.
Check the wiring connection of regenerative
resistor.
Reconnect regenerative resistor.
Regenerative switch
transistor fault
Check if regenerative switch transistor is short-
circuited.
Please contact your distributor for
assistance or contact with Delta.
Parameter setting is in
error
Confirm the parameter setting and
specifications of regenerative resistor.
Correctly reset parameter again.
: Overload
Potential Cause Checking Method Corrective Actions
The drive has exceeded
its rated load during
continuous operation.
Check if the drive is overloaded.
Increase motor capacity or reduce
load.
Check if there is mechanical vibration Adjust gain value of control circuit.Control system
parameter setting is
incorrect.
Accel/Decel time setting is too fast. Decrease Accel/Decel time setting.
The wiring of drive and
encoder is in error.
Check the wiring of U, V, W and encoder. Ensure all wiring is correct.
: Overspeed
Potential Cause Checking Method Corrective Actions
Speed input command
is not stable (too much
fluctuation).
Use signal detector to detect if input signal is
abnormal.
Ensure that input command
frequency is stable (not fluctuate
too much) and activate filter
function (P1-06, P1-07 and P1-08).
Over-speed parameter
setting is defective.
Check if over-speed parameter setting value is
too low.
Correctly set over-speed parameter
setting (P2-34).
: Abnormal pulse control command
Potential Cause Checking Method Corrective Actions
Pulse command
frequency is higher
than rated input
frequency.
Use pulse frequency detector to measure input
frequency.
Correctly set the input pulse
frequency.
: Excessive deviation
Potential Cause Checking Method Corrective Actions
Maximum deviation
parameter setting is too
small.
Check the maximum deviation parameter
setting and observe the position error value
when the motor is running.
Increases the parameter setting
value of P2-35.
Gain value is too small. Check for proper gain value. Correctly adjust gain value.
Torque limit is too low. Check torque limit value. Correctly adjust torque limit value.
There is an overload. Check for overload condition.
Reduce external applied load or re-
estimate the motor capacity.