Omron OMNUC G5 R88D-KN series, Руководство пользователя

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11-33
11-4 Troubleshooting
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
Noise is applied to the
control I/O signal cable
because the cable is longer
than the specified length. Check the length of the control
I/O signal cable. Shorten the control I/O
signal cable to 3 m or
less.
Noise is applied to the cable
because the encoder cable
does not meet
specifications. Check that it is a twisted-pair
shielded cable with core wires
that are at least 0.12 mm
2
.
Use encoder cable that
meets specifications.
Noise is applied to the
encoder cable because the
cable is longer than the
specified length. Check the length of the
encoder cable. Shorten the encoder
cable to less than 50 m.
Noise is applied to the signal
lines because the encoder
cable is stuck or the sheath
is damaged. Check the encoder cable for
damage. Correct the encoder
cable's pathway.
Too much noise is applied to
the encoder cable. Check whether the encoder
cable is bound together with or
too close to high-current lines. Install the encoder cable
where it won't be
subjected to surges.
The FG's potential is
fluctuating due to devices
near the Servomotor, such
as welding machines. Check for ground problems
(loss of ground or incomplete
ground) at equipment such as
welding machines near the
Servomotor. Ground the equipment
properly and prevent
currents from flowing to
the encoder FG.
Errors are being caused by
excessive vibration or shock
on the encoder. There are problems with
mechanical vibration or motor
installation (such as the
precision of the mounting
surface, attachment, or axial
offset). Reduce the mechanical
vibration or correct the
Servomotor's installation.
Overshooting at a startup
or stop The Position Loop Gain 1
(Pn100) is too large. Review the Pn100. Adjust the gain in a
manner that prevents
overshoots.
The Speed Loop Gain 1
(Pn101) and the Speed Loop
Integral Time Constant 1
(Pn102) are balanced
incorrectly. Review the settings on the
Pn101 and Pn102. By the CX-Drive or the
analog monitor, measure
the response and adjust
the gain.
The machine rigidity set by
the realtime autotuning is
incorrect. Review the setting of machine
rigidity. Match the machine
rigidity setting to the load
rigidity.
The set inertia ratio differs
from the load. Review the Inertial Ratio
(Pn004). Align the setting on the
Pn004 with the load.
Vibration is occurring at
the same frequency as
the power supply. Inductive noise is occurring. Check whether the drive
control signal lines are too
long. Shorten the control signal
lines.
Check whether the control
signal lines and power supply
lines are not bound together. • Separate control signal
lines from power
supply lines.
• Use a low-impedance
power supply for
control signals.
Symptom Probable cause Items to check Measures