11-17
11-4 Troubleshooting
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
16 0 Overload
When the feedback value for torque
command exceeds the overload level
specified in the Overload Detection
Level Setting (Pn512), 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
(Pn004) 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 was
connected to a Servomotor for
another axis.
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.
Refer to 3-2 Overload Characteristics (Electronic Thermal Function) on page
3-32 for information on overload characteristics.
Alarm
number
Name Cause Measures
Main Sub
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