Mitsubishi Electric MELSERVO MR-J2S- A Instruction Manual page 203

10. TROUBLESHOOTING
Display Name
AL.32 Overcurrent
AL.33 Overvoltage
AL.35 Command
pulse frequency
error
AL.37 Parameter
error
Definition
Current that flew is 1. Short occurred in servo amplifier
higher than the output phases U, V and W.
permissible current
2. Transistor (IPM) of the servo
of the servo
amplifier faulty.
amplifier.
Alarm (AL.32) occurs if power is
switched on after U,V and W
are disconnected.
3. Ground fault occurred in servo
amplifier output phases U, V and
W.
4. External noise caused the
overcurrent detection circuit to
misoperate.
Current higher than 5. Improper wiring of the
the permissible regenerative brake option.
current flew in the
regenerative brake
transistor.
(MR-J2S-500A only)
Converter bus 1. Regenerative brake option is not
voltage exceeded used.
400VDC.
2. Though the regenerative brake
option is used, the parameter No.
0 setting is " 00
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
amplifier output phases U, V and
W.
Input pulse 1. Pulse frequency of the command
frequency of the pulse is too high.
command pulse is
2. Noise entered command pulses.
too high.
3. Command device failure
Parameter setting is 1. Servo amplifier fault caused the
wrong. parameter setting to be rewritten.
2. Regenerative brake option not
used with servo amplifier was
selected in parameter No.0.
3. The number of write times to EEP-
ROM exceeded 100,000 due to
parameter write, etc.
4.The alarm code output (parameter
No. 49) was set by the absolute
position detection system.
5.The alarm code output (parameter
No.49) was set with the
electromagnetic brake interlock
(MBR) assigned to pin CN1B-19.
Cause
Checking method
(not used)".
10 - 10
Action
Correct the wiring.
Change the servo amplifier.
Correct the wiring.
Take noise suppression measures.
Wire the regenerative brake option
correctly.
Use the regenerative brake option.
Make correct setting.
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.
Change the command pulse frequency to a
proper value.
Take action against noise.
Change the command device.
Change the servo amplifier.
Set parameter No.0 correctly.
Change the servo amplifier.
The absolute position detection system
and the alarm code output function are
exclusive. Set as either one of the two is
used.
The signal assignment function of the
electromagnetic interlock (MBR) to pin
CN1B-19 and the alarm code output
function are exclusive. Set as either one of
the two is used.