Omron R88D-GT series

8-11
8-3 Troubleshooting
8
Troubleshooting
23
Encoder
communications data
error
Occurs when the power
supply is turned ON or
during operation.
• The encoder signal
wiring is incorrect.
• Correct the wiring.
• Noise on the encoder
wiring causes
incorrect operation.
• Take measures
against noise on the
encoder wiring.
• The power supply
voltage for the
encoder has dropped
(especially when the
cable is long.)
• Provide the required
encoder power supply
voltage (5 VDC±5%).
24
Deviation counter
overflow
Occurs when the Servo-
motor does not rotate
even when command
pulses are input.
• The Servomotor
power wiring or the
encoder wiring is
incorrect.
• Correct the wiring.
• The Servomotor is
mechanically being
held.
• If the Servomotor
shaft is held by
external force, release
it.
• Release the electro-
magnetic brake.
• Control PCB error. • Replace the Servo
Drive.
Occurs during
high-speed rotation.
• The Servomotor
power wiring or the
encoder wiring is
incorrect.
• Correct the wiring.
Occurs when a long
string of command
pulses is given.
• Gain adjustment is
insufficient.
• Adjust the gain.
• The acceleration and
deceleration rapid.
• Extend the accelera-
tion and deceleration
times.
• The load is too large. • Reduce the load.
• Select a suitable
Servomotor.
Occurs during operation.
• The setting for the
Deviation Counter
Overflow Level (Pn70)
was exceeded.
• Increase the setting of
Pn70.
• Reduce the rotation
speed.
• Lighten the load.
•
Extend the accelera-
tion and
deceleration
times.
Alarm
code
Error Status when error occurs Cause Countermeasure