Instruction manual

9. TROUBLESHOOTING
Definition
.. 20 Encoder error 2 Communication
error occurred
between encoder
and servo amplifier.
.. 24 IMotor outout
Ground fault
ground fault
occurred at the
servo motor outputs
(U,V and W phases)
of the servo
amplififer.
the instantaneous
permissible speed.
.. 31 loverspeed
Speed has exceeded
._ 32 Iercurrent
-
Current that flew is
higher than the
permissible current
of the servo
amplifier.
.. 33
voltage reached or
converter bus
Input value
of
Overvoltage
exceeded
35V.
?aulty parts in the servo amplifier Change the servo amplifier.
Checking method
Alarm
(A. 17 or A. 18) occurs if
power is switched on after
connectors CN1.4. CNlB,
rlotor cable faulty
Encoder wiring broken or shorted)
&pair or change the cable.
3ervo motor power cable insulation
leteriorated.
Change the cable.
i. Input command pulse frequency Set command pulses correctly.
exceeded the permissible
instantaneous speed frequency.
time constant caused overshoot to
be large.
constant.
overshoot.
2. If servo gain cannot be set to prope
value:
1) Reduce load inertia moment ratio: or
2) Reexamine acceleration/
?. Small acceleration/deceleration
Increase acceleration/deceleration time
1. Servo system is instable to cause
1. Re-set servo gain to proper value.
deceleration time constant.
1. Electronlc gear ratio is large
Set correctly.
barameters No. 3, 4)
5. Encoder faulty.
1. Short occurred in servo amplifier
Change the servo motor.
Correct the wring.
output phases U, V and W.
amplfier faulty.
2. Transistor (TPM) of the servo
Change the servo amplifier.
Checking method
Alarm (X. 32) occurs if power is
switched on after
U, V and W
are disconnected.
3. Ground fault occurred in servo
Correct the wiring.
amplifier output phases U, V and
i. External noise caused the
Take noise suppression measures.
overcurrent detection circuit to
misoperate.
?ower supply voltage is outside the
lermissible voltage range.
Change battery.
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