Mitsubishi Electric Melservo-J3 Series MR-J3-B Instruction Manual page 176

8. TROUBLESHOOTING
Display Name
33 Overvoltage
34 Receive error 1 SSCNET
35 Command
frequency error
36 Receive error2
Definition
The following shows 1. Regenerative option is not used.
the input value of 2. Though the regenerative option is
used, the parameter No.PA02
converter bus
setting is "
voltage.
3. Lead of built-in regenerative resistor
MR-J3- B(1):
400VDC or more or regenerative option is open or
MR-J3- B4: disconnected.
800VDC or more
4. Regenerative transistor faulty.
5. Wire breakage of built-in
regenerative resistor or regenerative
option
6. Capacity of built-in regenerative
resistor or regenerative option is
insufficient.
7. Power supply voltage high.
8. Ground fault occurred in servo
motor power (U, V, W).
9. The jumper across BUE-SD of the
FR-BU2 brake unit is removed.
1. The SSCNET cable is
communication error disconnected.
(Continuously
2. The surface at the end of SSCNET
communication error
cable got dirty.
with about 3.5ms
3. The SSCNET cable is broken or
interval.)
severed.
4. Noise entered the servo amplifier.
5. Optical characteristic of SSCNET
cable deteriorated because vinyl
tape and/or wire sheath, which
contains migrating plasticizer,
adhered to the cable.
Input pulse frequency 1. Command given is greater than the
of command pulse is maximum speed of the servo motor.
too high.
2. Servo system controller failure.
3. Noise entered the servo amplifier.
4. Noise entered the controller.
SSCNET 1. The SSCNET
communication error disconnected.
(Intermittently
2. The surface at the end of SSCNET
communication error
cable got dirty.
with about 70ms
3. The SSCNET
interval.)
severed.
4. Noise entered the servo amplifier.
5. Optical characteristic of SSCNET
cable deteriorated because vinyl
tape and/or wire sheath, which
contains migrating plasticizer,
adhered to the cable.
Cause
Use the regenerative option.
Set correctly.
00 (not used)".
1. Change lead.
2. Connect correctly.
Change servo amplifier
1. For wire breakage of built-in regenerative
2. For wire breakage of regenerative option,
Add regenerative option or increase
capacity.
Review the power supply.
Correct the wiring.
Fit the jumper across BUE-SD.
Connect it after turning off the control circuit
power supply for servo amplifier.
Wipe dirt at the surface away. (Refer to
section 3.9)
Change the cable.
Take noise suppression measures.
Remove the vinyl tape and/or wire sheath,
which contains migrating plasticizer, and
exchange the cable.
Review operation program
Change the servo system controller.
Take noise of I/O signal suppression
measures.
Take noise from the controller suppression
measures.
cable is Connect it after turning off the control circuit
power supply for servo amplifier.
Wipe dirt away from the surface. (Refer to
section 3.9)
cable is broken or Change the cable.
Take noise suppression measures
Remove the vinyl tape and/or wire sheath,
which contains migrating plasticizer, and
exchange the cable.
8 - 5
Action
resistor, change servo amplifier.
change regenerative option.