8-9
8-3 Troubleshooting
8
Troubleshooting
23
Encoder data error
Occurs when the power
supply is turned ON or
during operation.
•
The encoder signal wir-
ing is incorrect.
•
Correct the wiring.
•
Noise on the encoder
wiring causes incorrect
operation.
•
Take measures against
noise on the encoder wir-
ing.
•
The power supply volt-
age for the encoder has
dropped (especially
when the cable is long.)
•
Provide the required en-
coder power supply volt-
age (5 VDC±5%).
24
Deviation counter
overflow
Occurs when the Ser-
vomotor does not ro-
tate even when
command pulses are
input.
•
The Servomotor power
wiring or the encoder wir-
ing is incorrect.
•
Correct the wiring.
•
The Servomotor is me-
chanically being held.
•
If the Servomotor shaft is
held by external force, re-
lease it.
•
Release the electromag-
netic brake.
•
Control PCB error.
•
Replace the Servo Drive.
Occurs during high-
speed rotation.
•
The Servomotor power
wiring or the encoder wir-
ing is incorrect.
•
Correct the wiring.
Occurs when long com-
mand pulses are given.
•
Gain adjustment is insuf-
ficient.
•
Adjust the gain.
•
The acceleration and de-
celeration are too rapid.
•
Extend the acceleration
and deceleration times.
•
The load is too large.
•
Reduce the load.
•
Select a suitable Servo-
motor.
Occurs during opera-
tion.
•
The setting for the Devia-
tion Counter Overflow
Level (Pn63) was ex-
ceeded.
•
Increase the setting of
Pn63.
•
Slow the rotation speed.
•
Reduce the load.
•
Extend the acceleration
and deceleration times.
26
Overspeed
Occurs during high-
speed rotation.
•
The speed command in-
put is too large.
•
Set the command pulse
frequency to 500 kpps
max.
•
The setting for the Elec-
tronic Gear Ratio Numer-
ator (Pn46 or Pn47) is not
appropriate.
•
Set Pn46 and Pn47 so
that the command pulse
frequency is 500 kpps
max.
•
The maximum number of
rotations is exceeded
due to overshooting.
•
Adjust the gain.
•
Reduce the maximum
command speed.
•
The encoder wiring is in-
correct.
•
Correct the wiring.
Occurs when torque
limit switching is used.
•
The Overspeed Detec-
tion Level Setting (Pn70)
or No. 2 Overspeed De-
tection Level Setting
(Pn73) has been exceed-
ed.
•
If torque limit switching is
used, correctly set the al-
lowable operating speed
for Pn70 and Pn73.
Alarm
code
Error
Status when error
occurs
Cause
Countermeasure
