Mitsubishi Electric MR-J3-10B Instruction Manual page 146

8. TROUBLESHOOTING
Display
33 Overvoltage
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34 Receive error 1 SSCNET
35 Command
frequency error
36 Receive error2
37 Parameter error Parameter setting is
Name Definition
Converter bus
voltage exceeded
400VDC.
communication error
(Continuously
communication error
with about 3.5ms
interval.)
Input pulse frequency
of command pulse is
too high.
SSCNET
communication error
(Intermittently
communication error
with about 70ms
interval.)
wrong.
Cause
1. Regenerative brake option is not
used.
2. Though the regenerative brake
option is used, the parameter
No.PA02 setting is " 00 (not
used)".
3. Lead of built-in regenerative brake
resistor or regenerative brake option
is open or disconnected.
4. Regenerative transistor faulty.
5. Wire breakage of built-in
regenerative brake resistor or
regenerative brake option
6. Capacity of built-in regenerative
brake resistor or regenerative brake
option is insufficient.
7. Power supply voltage high.
8. Ground fault occurred in servo
motor power (U, V, W).
1. The SSCNET cable is
disconnected.
2. The surface at the end of SSCNET
cable got dirty.
3. The SSCNET cable is broken or
severed.
4. Noise entered the servo amplifier.
1. Command given is greater than the
maximum speed of the servo motor.
2. Servo system controller failure.
3. Noise entered the servo amplifier.
4. Noise entered the controller.
1. The SSCNET cable is
disconnected.
2. The surface at the end of SSCNET
cable got dirty.
3. The SSCNET cable is broken or
severed.
4. Noise entered the servo amplifier.
1. Servo amplifier fault caused the
parameter setting to be rewritten.
2. There is a parameter whose value
was set to outside the setting range
by the controller.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
8 - 5
Action
Use the regenerative brake option.
Setcorrectly.
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.
Review the power supply.
Correct the wiring.
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.
Review opration program
Change the servo system controller.
Take noise of I/O signal suppression
measures.
Take noise from the controller suppression
measures.
Connect it after turning off the control circuit
power supply for servo amplifier.
Wipe dirt away from the surface. (Refer to
section 3.9)
Change the cable.
Take noise suppression measures
Change the servo amplifier.
Change the parameter value to within the
setting range.
Change the servo amplifier.