8-10
8-3 Troubleshooting
8
Troubleshooting
27 Electronic gear
setting error
Occurs when com-
mand pulses are given.
• 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.
29 Deviation counter
overflow
Occurs when the Ser-
vomotor does not ro-
tate even if 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.
34 Overrun limit error Occurs during opera-
tion.
• The Overrun Limit Set-
ting (Pn26) is exceeded
during operation.
• Adjust the gain.
• Increase the setting for
Pn26.
• Set Pn26 to 0 to disable
the function.
36 Parameter error Occurs when the power
supply is turned ON.
• There are errors in the
parameters that were
read.
• Reset all parameters.
• The Servo Drive is faulty. • Replace the Servo Drive.
37 Parameter corruption Occurs when the power
supply is turned ON.
• The parameters that
were read are corrupt.
• Replace the Servo Drive.
38 Drive prohibit input
error
Occurs whe
n the Servo
is turn
ed ON or during
operation.
• The Forward Drive Pro-
hibit Input (POT) and Re-
verse Drive Prohibit Input
(NOT) were both OFF at
the same time.
• Correct the wiring.
• Replace the limit sensor.
• Check whether the pow-
er supply for control is in-
put correctly.
• Check whether the set-
ting for Drive Prohibit In-
put Selection (Pn04) is
correct.
44 Encoder counter er-
ror 1
Occurs during opera-
tion.
• The encoder detected an
error in the counter.
• Replace the Servomotor.
45 Encoder counter er-
ror 2
Occurs during opera-
tion.
• The encoder detected an
error in the counter.
• Replace the Servomotor.
48 Encoder phase Z
error
Occurs during opera-
tion.
• A phase-Z pulse from the
encoder was not detect-
ed regularly.
• Replace the Servomotor.
49 Encoder CS signal
error
Occurs during opera-
tion.
• A logic error of the CS
signal from the encoder
was detected.
• Replace the Servomotor.
Alarm
code
Error
Status when error
occurs
Cause Countermeasure
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