Omron G5 R88D-KE Series, Руководство пользователя

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10 Troubleshooting and Maintenance
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
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Error Diagnosis Us
ing
the Oper
ation State
The Servomotor
does not stop or is
hard to stop even if
the Operation
Command (RUN)
signal is turned
OFF while the
Servomotor is
rotating. The load inertia is too large. Check for the following:
• Is the load too high?
• Is the motor speed too high?
Review the load conditions and
replace the Servomotor and the
Servo Drive with proper ones.
The stop circuit is faulty. – Replace the Servo Drive.
The Servomotor
generates
abnormal noise or
vibration. The mechanical installation
of the Servomotor is
improper. Check to see if the Servomotor
mounting screws are loose. Retighten the mounting screws.
Check to see if the coupling is
installed eccentrically. Center the coupling.
Check to see if the coupling is
unbalanced. Adjust the coupling balance.
There is a problem with the
bearings. Check for noise or vibration around
the bearings. Contact the OMRON dealer or
sales office.
The gain setting is
inappropriate. – Perform manual tuning.
The value set in Speed
Feedback Filter Time
Constant (Pn103) is
inappropriate. Check the value set in Pn103. Restore the default value 0 or
increase the set value.
The control I/O signal cable
is affected by noise
because it does not meet
the specifications. Check to see if the cable is a twisted-
pair cable or common shielded
twisted-pair cable with at least
0.08-mm
2
core wires.
Use a control I/O signal cable
that meets the specifications.
The control I/O signal cable
is affected by noise
because it is longer than
the specified length. Check the length of the control I/O
signal cable. Limit the wiring length of the
control I/O signal cable to 3 m
or less.
The encoder cable is
affected by noise because it
does not meet the
specifications. Check to see if the cable is a common
shielded twisted-pair cable with at
least 0.12-mm
2
core wires.
Use an encoder cable that
meets the specifications.
The encoder cable is affected
by noise because it is longer
than the specified length. Check the length of the encoder cable. Limit the wiring length of
encoder cables to 20 m or less.
The encoder cable is
affected by noise because it
is stuck by something or
has a torn sheath. Check the encoder cable for damage. Correct the encoder cabling.
The encoder cable is
affected by excessive noise. Check to see if the encoder cable is
bound together with or too close to
high-current lines. Install the encoder cable where
it is not subject to surges.
The FG’s potential fluctuates
due to equipment installed
near the Servomotor, such
as a welding machine. Check for grounding problems (loss of
ground or incomplete ground) of
equipment such as a welding machine
installed near the Servomotor. Ground the equipment properly
to prevent the current from
flowing into the external
encoder’s FG.
The encoder fails due to
excessive vibration or
shock. There is a problem of mechanical
vibration or defective motor installation
(low mounting surface accuracy, poor
fixing, eccentric mounting). Reduce the mechanical
vibration or correct the
Servomotor mounting
conditions.
Symptom Probable cause Check items Measures