№
SX-DCT00221 -
37-
Panasonic Corporation
11. Troubleshooting
If any trouble should be found, follow the steps below to determine the fault.
If you cannot find out the cause, we recommend that you use the digital keypad (sold separately) or
communication software “PANATERM® for BL” (sold separately) to check the detail of trip. If the mo-
tor is in failure, or any part is damaged, or in another case of malfunction, contact the Panasonic part-
ner where you bought the product.
Phenomenon
Detail of checking
Countermeasure
Motor does not
rotate
Is any error in wiring.
Apply proper wiring.
Check whether protective function is acti-
vated.
Check for tripping with digital keypad or PANATERM for
BL.
Turn off power once, and turn on again.
Reset tripping.
(Only when the motor is connected to the
key pad )
Check whether power LED (green) is lighted
up.
If the LED is off when power is input to the brushless am-
plifier, failure is possible.
Contact us for repair.
Check whether voltage on input power is
normal.
Check the supply voltage.
Check whether run start signal is input.
Check wiring.
Homing is not executed yet.
First set the parameter for homing operation and execute
homing operation.
Check whether target position of each
point of parameter is set.
Set the target position.
Motor does not ro-
tate or stops dur-
ing operation.
Check whether protective function is acti-
vated. Check whether alarm LED (red) is on.
It may be overloaded. Reduce the load or increase the
output capacity.
Motor stops during
deceleration.
Check whether the inertia of load is too
large.
Regenerative overvoltage protection may have worked.
Reduce inertia. Increase deceleration time with Digital
key pad or "PANATERM for BL" or RS485 communica-
tion. Use an external regenerative resistor (option).
Large vibration or
noise.
Output shaft of motor and shaft of load are
not aligned.
Check the joint between the output shaft and load shaft
of the motor.
Damage to bearing.
Contact us for repair.
Gain is not adjusted properly.
Gain must be adjusted. Lower the setting.
Motor rotates
reversely.
Check whether the setting of rotation direc-
tion (parameter) is wrong.
Check the setting of parameter.
Coordinate system setting.
Rotation speed is
unstable
during
operation (actual
speed).
Check whether the load fluctuates greatly.
Increase the speed proportional gain. (If you increase the
proportional gain too much, the motor may vibrate caus-
ing a malfunction, so be careful.)
Change to a motor with a large output.
Positioning accu-
racy is not precise.
Check whether the setting of parameter is
wrong.
Adjust the parameter of target position of each point.
Check the parameter of coordinate setting (relative and
absolute).
Home position
shifts.
Chattering of home sensor
Check wiring.
Homing speed is too fast.
Reduce the setting speed with parameter.
Motor is too hot.
Start and stop are repeated frequently.
Check by display of load factor. Use within 80% is rec-
ommended.
Parameter does
not change.
Check whether parameters are changed
which are effective after resetting.
Turn off power once, and turn on again for resetting.
See the list of parameters.
Rotation speed
(actual speed) and
target position are
not as expected.
Check whether the setting of
parameter is wrong.
Check the detail of parameter setting.
See the list of parameters.
