Omron R88M-K User Manual page 527

Error No. (hex)
Name
Main Sub
16 0 Overload
18 0 Regeneration
Overload
1 Regeneration
Tr Error
G5-series AC Servomotors and Servo Drives User's Manual (with Built-in EtherCAT Communications)
Cause
When the feedback value for torque
command exceeds the overload level
specified in the Overload Detection Level
Setting (3512 hex), overload protection is
performed according to the overload
characteristics.
• The load was heavy, the effective torque
exceeded the rated torque, and operation
continued too long.
• Vibration or hunting occurred due to faulty
gain adjustment. The Servomotor vibrates
or makes unusual noise. The Inertia Ratio
(3004 hex) setting is faulty.
• The Servomotor wiring is incorrect or
broken.
• The machine was hit by an object, or the
machine load suddenly became heavy.
The machine was distorted.
• The electromagnetic brake remains ON.
• When multiple machines were wired, the
wiring was incorrect and the Servomotor
cable to was connected to a Servomotor
for another axis.
Refer to 3-2 Overload Characteristics (Electronic Thermal Function) on page 3-35 for
information on overload characteristics.
The regenerative energy exceeds the
processing capacity of the Regeneration
Resistor.
• The regenerative energy during
deceleration caused by a large load inertia
increased the converter voltage, and then
insufficient energy absorption by the
Regeneration Resistor further increased
the voltage.
• The Servomotor rotation speed is too high
to absorb the regenerative energy within
the specified deceleration time.
• The operating limit of the external resistor
is limited to a 10% duty.
Precautions for Correct Use
Always provide a temperature fuse or other protective measure when setting the External
Regeneration Resistor Setting (3017 hex) to 2. Otherwise, the Regeneration Resistor will
not be protected, generate excessive heat, and be burnt.
The Servo Drive regeneration drive Tr is
faulty.
12 Troubleshooting and Maintenance
Measures
Check if torque (current) waveforms oscillate
or excessively oscillates vertically during
analog output or communications. Check the
overload warning display and the load rate
through communications.
• Increase the capacities of the Servo Drive
and the Servomotor. Set longer
acceleration and deceleration times.
Reduce the load.
• Readjust the gain.
• Connect the Servomotor cable as shown
in the wiring diagram. Replace the cable.
• Remove the distortion from the machine.
Reduce the load.
•
• Measure the voltage at the brake
terminals. Turn OFF the brake.
• Wire the Servomotor and the encoder
correctly so that the wiring matches the
axes.
Check the load rate of the Regeneration
Resistor through communications. This
Regeneration Resistor cannot be used for
continuous regenerative braking.
• Check the operation pattern (speed
monitor). Check the load rate of the
Regeneration Resistor and check for the
excessive regeneration warning display.
Increase the capacities of the Servo Drive
and the Servomotor, and length the
deceleration time. Use an External
Regeneration Resistor.
• Check the operation pattern (speed
monitor). Check the load rate of the
Regeneration Resistor and the excessive
regeneration warning display. Increase the
capacities of the Servo Drive and the
Servomotor, and lengthen the deceleration
time. Reduce the Servomotor rotation
speed. Use an External Regeneration
Resistor.
• Set the Regeneration Resistor Selection
(3016 hex) to 2.
Replace the Servo Drive.
12
12-17