№
SR-ZSV00039
－
60
－
Motor Business Unit, Appliances Company, Panasonic Corporation
Protective
function
Main
Sub
Name
Cause
Action
15
0
Over-heat
protection
The temperature of the servo drive heat sink and
power devices has increased to the specified value
or more.
①
The ambient temperature of the servo drive has
exceeded the specified value.
②
Overload
①
Improve the ambient temperature and cooling
conditions for the servo drive.
②
Increase the capacity of the servo drive and motor.
Specify a longer acceleration time.
Reduce load.
16
0
Over-load
protection
Torque command value has exceeded the over-load
level specified in Pr5.12 “Over-load level
setup“ and resulted in overload protection according
to the time characteristics.
①
The load is too heavy, the effective torque has
exceeded the rated torque, and the operation
continued for too many hours.
②
Oscillation and hunting due to poor gain
tuning. The motor is showing vibration and
abnormal noise. The set value specified in
Pr0.04 “Inertia ratio” is abnormal.
③
The motor wiring is wrong or disconnected
④
The machine has collided or suddenly got
heavy. The machine has been distorted.
⑤
The electromagnetic brake was kept applied.
⑥
While making multiple connections, the motor
wire was connected to some other axes,
resulting in incorrect wiring.
Check the torque (current) curve for oscillation and
excessive amplitude by using the analog output or the
communication. See the front panel or communication to
check for an overload warning indication and load factor.
①
Increase the capacity of the servo drive and motor.
Specify a longer acceleration time. Reduce load.
②
Redo the gain tuning.
③
Connect the motor wires to the wiring diagram.
Change the cables.
④
Remove the distortion of the machine. Reduce load.
⑤
Measure the brake terminal voltage. Release the
brake.
⑥
Make the correct connection for the motor wires,
encoder wires and their axes.
18
0
Over-regeneratio
n load protection
Regenerative energy has exceeded the capacity of
the regenerative resistor.
①
Regenerative energy generated during the
deceleration due to large load inertia has
increased voltage at the converter, causing less
regenerative resistor energy to be absorbed,
resulting in further voltage increase.
②
Due to high motor revolution, regenerative
energy cannot be fully absorbed during the
specified deceleration time.
③
The operating limit of the external resistor is
restricted to 10 % duty.
Check the load factor of the regenerative resistor either
with the front panel or by communication. The
regenerative resistor should not be used for continuous
regenerative braking.
①
Check the operation patterns (velocity monitor).
Check the display for the indication of regenerative
resistor load factor and a regeneration over warning.
Increase the capacity of the motor and servo drive.
Make the deceleration time more gradual. Use an
external regenerative resistor.
②
Check the operation patterns (velocity monitor).
Check the display for the indication of regenerative
resistor load factor and a regeneration over warning.
Increase the capacity of the motor and servo drive.
Make the deceleration time more gradual. Decrease
the motor revolution. Use an external regenerative
resistor.
③
Set Pr0.16 to 2.
(Continued)
Please find the overload time characteristics at the end of this section.
Important: When specifying 2 for Pr0.16, always provide the external protection such as a thermal
fuse, as it will loose the protection for the regenerative resistor, resulting in its possible overheat and
burnout.
