sh030051g.pdf - 第179页

8 - 6 8. TROUBLESHOOTING Display Name Definition Cause Action 37 Parameter error Parameter setting is wrong. 1. Servo amplifier fault caused the parameter setting to be rewritten. Change the servo amplifier. 2. There is …

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8 - 5
8. TROUBLESHOOTING
Display Name Definition Cause Action
33 Overvoltage The following shows
the input value of
converter bus
voltage.
MR-J3-
B(1):
400VDC or more
MR-J3-
B4:
800VDC or more
1. Regenerative option is not used. Use the regenerative option.
2. Though the regenerative option is
used, the parameter No.PA02
setting is " 00 (not used)".
Set correctly.
3. Lead of built-in regenerative resistor
or regenerative option is open or
disconnected.
1. Change the lead.
2. Connect correctly.
4. Regenerative transistor faulty. Change the servo amplifier.
5. Wire breakage of built-in
regenerative resistor or regenerative
option
1. For wire breakage of built-in regenerative
resistor, change the servo amplifier.
2. For wire breakage of regenerative option,
change the regenerative option.
6. Capacity of built-in regenerative
resistor or regenerative option is
insufficient.
Add regenerative option or increase
capacity.
7. Power supply voltage high. Check the power supply.
8. Ground fault occurred in servo
motor power (U, V, W).
Correct the wiring.
9. The jumper across BUE-SD of the
FR-BU2 brake unit is removed.
Fit the jumper across BUE-SD.
34 Receive error 1 SSCNET
communication error
(Continuously
communication error
with about 3.5ms
interval.)
1. The SSCNET
cable is
disconnected.
Connect it after turning off the control circuit
power supply for servo amplifier.
2. The surface at the end of SSCNET
cable got dirty.
Wipe dirt at the surface away. (Refer to
section 3.9)
3. The SSCNET cable is broken or
severed.
Change the cable.
4. Noise entered the servo amplifier. Take noise suppression measures.
5. Optical characteristic of SSCNET
cable deteriorated because vinyl
tape and/or wire sheath, which
contains migrating plasticizer,
adhered to the cable.
Remove the vinyl tape and/or wire sheath,
which contains migrating plasticizer, and
exchange the cable.
35 Command
frequency error
Input pulse frequency
of command pulse is
too high.
1. Command given is greater than the
maximum speed of the servo motor.
Check operation program.
2. Servo system controller failure. Change the servo system controller.
3. Noise entered the servo amplifier. Take noise of I/O signal suppression
measures.
4. Noise entered the controller. Take noise from the controller suppression
measures.
36 Receive error 2 SSCNET
communication error
(Intermittently
communication error
with about 70ms
interval.)
1. The SSCNET
cable is
disconnected.
Connect it after turning off the control circuit
power supply for servo amplifier.
2. The surface at the end of SSCNET
cable got dirty.
Wipe dirt away from the surface. (Refer to
section 3.9)
3. The SSCNET cable is broken or
severed.
Change the cable.
4. Noise entered the servo amplifier. Take noise suppression measures.
5. Optical characteristic of SSCNET
cable deteriorated because vinyl
tape and/or wire sheath, which
contains migrating plasticizer,
adhered to the cable.
Remove the vinyl tape and/or wire sheath,
which contains migrating plasticizer, and
exchange the cable.
8 - 6
8. TROUBLESHOOTING
Display Name Definition Cause Action
37 Parameter error Parameter setting is
wrong.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
Change the servo amplifier.
2. There is a parameter whose value
was set to outside the setting range
by the controller.
Change the parameter value to within the
setting range.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
Change the servo amplifier.
45 Main circuit
device overheat
Main circuit device
overheat
1. Servo amplifier faulty. Change the servo amplifier.
2. The power supply was turned on
and off continuously by overloaded
status.
The drive method is reviewed.
3. Ambient temperature of servo motor
is over 55
.
Check environment so that ambient
temperature is 0 to 55 .
4. Used beyond the specifications of
close mounting.
Use within the range of specifications.
46 Servo motor
overheat
Servo motor
temperature rise
actuated the thermal
sensor.
1. Ambient temperature of servo motor
is over 40
.
Check environment so that ambient
temperature is 0 to 40 .
2. Servo motor is overloaded. 1. Reduce load.
2. Check operation pattern.
3. Use servo motor that provides larger
output.
3. Thermal sensor in encoder is faulty. Change the servo motor.
47 Cooling fan
error
The cooling fan of
the servo amplifier
stopped, or its speed
decreased to or
below the alarm
level.
1. Cooling fan life expiration (Refer to
section 2.5.)
Change the cooling fan of the servo
amplifier.
2. Foreign matter caught in the cooling
fan stopped rotation.
Remove the foreign matter.
3. The power supply of the cooling fan
failed.
Change the servo amplifier.
50 Overload 1 Load exceeded
overload protection
characteristic of
servo amplifier.
1. Servo amplifier is used in excess
of its continuous output current.
1. Reduce load.
2. Check operation pattern.
3. Use servo motor that provides larger
output.
2. Servo system is instable and
hunting.
1. Repeat acceleration/
deceleration to execute auto tuning.
2. Change the auto tuning response setting.
3. Set auto tuning to OFF and make gain
adjustment manually.
3. Machine struck something. 1. Check operation pattern.
2. Install limit switches.
4. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's
input terminals U, V, W.
Connect correctly.
5. Encoder faulty.
Checking method
When the servo motor shaft is
rotated with the servo off, the
cumulative feedback pulses do not
vary in proportion to the rotary angle
of the shaft but the indication skips
or returns midway.
Change the servo motor.
6. After Overload 2 (51) occurred, turn
OFF/ON the power supply to clear
the alarm. Then the overload
operation is repeated.
1. Reduce load.
2. Check operation pattern.
3. Use servo motor that provides larger
output.
8 - 7
8. TROUBLESHOOTING
Display Name Definition Cause Action
51 Overload 2 Machine collision or
the like caused max.
For the time of the
alarm occurrence,
refer to the section
10.1.
1. Machine struck something. 1. Check operation pattern.
2. Install limit switches.
2. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's
input terminals U, V, W.
Connect correctly.
3. Servo system is instable and
hunting.
1. Repeat acceleration/deceleration to
execute auto tuning.
2. Change the auto tuning response setting.
3. Set auto tuning to OFF and make gain
adjustment manually.
4. Encoder faulty.
Checking method
When the servo motor shaft is
rotated with the servo off, the
cumulative feedback pulses do not
vary in proportion to the rotary angle
of the shaft but the indication skips
or returns midway.
Change the servo motor.
52 Error excessive The deviation
between the model
position and the
actual servo motor
position exceeds the
parameter No.PC01
setting value (initial
value: 3 revolutions).
1. Acceleration/deceleration time
constant is too small.
Increase the acceleration/deceleration time
constant.
2. Torque limit value set with controller
is too small.
Increase the torque limit value.
3. Motor cannot be started due to
torque shortage caused by power
supply voltage drop.
1. Check the power supply capacity.
2. Use servo motor which provides larger
output.
4. Position loop gain 1 (parameter
No.PB08) value is small.
Increase set value and adjust to ensure
proper operation.
5. Servo motor shaft was rotated by
external force.
1. When torque is limited, increase the limit
value.
2. Reduce load.
3. Use servo motor that provides larger
output.
6. Machine struck something. 1. Check operation pattern.
2. Install limit switches.
7. Encoder faulty Change the servo motor.
8. Wrong connection of servo motor.
Servo amplifier's output terminals U,
V, W do not match servo motor's
input terminals U, V, W.
Connect correctly.
9. SSCNET cable fault Change the SSCNET cable.
10. Optical characteristic of SSCNET
cable deteriorated because vinyl
tape and/or wire sheath, which
contains migrating plasticizer,
adhered to the cable.
Remove the vinyl tape and/or wire sheath,
which contains migrating plasticizer, and
exchange the cable.
8A USB
communication
time-out error
Communication with
MR Configurator in
test operation mode
stopped for longer
than the specified
time.
1. USB cable breakage. Change the USB cable.
8E USB
communication
error
Serial communication
error occurred
between servo
amplifier and
communication
device (e.g. personal
computer).
1. USB cable fault
(Open cable or short circuit)
Change the USB cable.
2. Communication device (e.g.
personal computer) faulty
Change the communication device (e.g.
personal computer).