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Protective function
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 key pad (option)
or communication software “PANATERM for BL” (download from our web site) to check
the detail of trip. If the motor or amplifier is in failure, or any part is damaged, or in another
case of malfunction, contact the Panasonic partner 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
activated.
Check for tripping with Digital key
pad.
Turn off power once, and turn on
again.
Reset tripping.
Check whether power LED (green)
is lighted up.
If the LED is off when power is input
to the amplifier, failure is possible.
Contact us for repair.
Check whether the voltage of power
input line is normal.
Check the supply voltage and voltage
described on amplifier nameplate.
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 stops during
the run.
Check whether protective function is
activated.
Overload on the motor is possible.
Reduce the load, increase the
capacity of motor, or increase the
gear reduction ratio.
Motor stops during
deceleration.
Check whether the inertia of load is
too large.
Regenerative overload error was
activated.
Make the inertia smaller.
Once turn off power and turn on
again for clearing trip.
Increase the deceleration time with
Digital key pad.
Phenomenon
Detail of checking
Countermeasure
Large vibration or
noise.
Output shaft of motor (gear head)
and shaft of load are not aligned.
Check the connection between the
output shaft of motor (gear head) and
the load.
Motor and gear head are not
assembled correctly.
Check the assembling condition
between motor and gear head, and
their combination, and assemble
them properly.
Damage to gear head or 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
direction (parameter) is wrong.
Rotation direction of motor and that
of gear head output shaft are reverse
with some gear reduction ratio of
gear head.
Check the setting of parameter.
Check the gear reduction ratio. Check
the rotation direction.
See the list of permissible shaft
torque on P.29.
Rotation speed is
unstable during
operation (actual
speed).
Check whether the load fluctuates
greatly.
Reduce the fluctuation of load.
Increase the capacity of motor.
Increase the gear reduction ratio.
Positioning
accuracy 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 recommended.
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.
Rotation of motor is
abnormal
Check the combination of motor and
amplifier.
Use the motor and amplifier with the
specified combination.
