Table of Contents
Advertisement
8. TROUBLESHOOTING
Display
Name
31
Overspeed
32
Overcurrent
33
Overvoltage
34
CRC error
35
Command F T
error
36
Transfer error
Definition
Speed has exceeded
1. Small acceleration/deceleration time
the instantaneous
constant caused overshoot to be
permissible speed.
large.
2. Servo system is instable to cause
overshoot.
3. Encoder faulty.
Current that flew is
1. Short occurred in servo amplifier
higher than the
output phases U, V and W.
permissible current of
2. Transistor (IPM) of the servo
the servo amplifier.
amplifier faulty.
3. Ground fault occurred in servo
amplifier output phases U, V and W.
4. External noise caused the
overcurrent detection circuit to
misoperate.
Converter bus voltage
1. Lead of built-in regenerative brake
exceeded 400V.
resistor or regenerative brake option
is open or disconnected.
2. Regenerative transistor faulty.
3. Wire breakage of built-in
regenerative brake resistor or
regenerative brake option
4. Capacity of built-in regenerative
brake resistor or regenerative brake
option is insufficient.
Bus cable is faulty.
1. Bus cable connector disconnected.
2. Bus cable fault
(Wire breakage or short)
3. Noise entered bus cable.
4. Termination connector disconnected. Connect termination connector.
Input command
1. Command pulse frequency exceeded
frequency exceeded
2.5Mpps.
2.5Mpps.
2. Noise entered bus cable.
3. Command unit faulty.
Bus cable is faulty.
1. Bus cable connector disconnected.
2. Bus cable fault
(Wire breakage or short)
3. Termination connector disconnected Connect termination connector.
Printed board is
Faulty parts in servo amplifier
faulty.
Cause
Checking method
Alarm (32) occurs if power is
switched on after U, V and W
are disconnected.
8 - 4
Action
Increase acceleration/
deceleration time constant.
1. Re-set servo gain to proper value.
2. If servo gain cannot be set to
proper value:
1) Reduce load inertia moment
ratio; or
2) Reexamine acceleration/
deceleration time constant.
Change the servo motor.
Correct the wiring.
Change the servo amplifier.
Correct the wiring.
Take noise suppression measures.
1. Change lead.
2. Connect correctly.
Change servo amplifier.
1. For wire breakage of built-in
regenerative brake resistor,
change servo amplifier.
2. For wire breakage of regenerative
brake option, change regenerative
brake option.
Add regenerative brake option or
increase capacity.
Connect correctly.
Repair or change cable.
Take measures against noise.
Reconsider operation program.
Take measures against noise.
Change the command unit.
Connect correctly.
Repair or change cable.
Change servo amplifier.
Advertisement
Table of Contents
