Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 68

1. TROUBLESHOOTING
Alarm No.: E9 Name: Main circuit off warning
Alarm content
Detail
Detail name
No.
E9.2 Bus voltage (1) The bus voltage
drop during low
speed operation
E9.3 Ready-on Check it with the check method for [AL. E9.1].
signal on
during main
circuit off
Alarm No.: EA Name: ABS servo-on warning
Alarm content
Detail
Detail name
No.
EA.1 ABS servo-on (1) The wiring of I/O
warning
(2) The sequence program
Alarm No.: EB Name: The other axis error warning
Alarm content
Detail
Detail name
No.
EB.1 The other axis (1) [AL. 24] occurred at
error warning
(2) [AL. 32] occurred at
(3) "All alarms" was set for
Alarm No.: EC Name: Overload 2
Alarm content
Detail
Detail name
No.
EC.1 Overload (1) The load is too large or
warning 2
The servo-on command was inputted with main circuit power supply off.
The bus voltage dropped during the servo motor driving under 50 r/min.
Cause
Check the bus voltage. It is lower than the
dropped during the
servo motor driving
under 50 r/min.
The servo-on was not executed within 1 s after ABSM (ABS transfer mode) was turned on.
Cause
Check if the I/O signal
signals is incorrect. wire is disconnected
or connected loosely.
Check the sequence
is incorrect. program.
An alarm, which stops all axes, such as [AL. 24 Main circuit error] or [AL. 32 Overcurrent] occurred in other
axis.
"All alarms (_ _ _ 1)" of "Target alarm selection of the other axis error warning" is selected in [Pr. PF02].
Cause
Check if [AL. 24] is
other axis. occurring at other axis.
Check if [AL. 32] is
other axis. occurring at other axis.
Check the [Pr. PF02]
alarm occurrence. setting.
Operations over rated output were repeated while the servo motor shaft was not rotated.
Cause
Check the effective
the capacity is not load ratio.
enough.
Check method Check result
prescribed value.
200 V amplifier:
400 V amplifier:
Check method Check result
It has a failure.
It has no failure.
The sequence
program is incorrect.
Check method Check result
It is occurring.
It did not occur.
It is occurring.
It did not occur.
"All alarms" is
selected.
Check method Check result
The effective load
ratio is high.
1 - 61
Action
Review the power
supply capacity.
Increase the
acceleration time
200 V DC
constant.
430 V DC
Action
Repair or replace the
I/O signal wire.
Check (2).
Modify the sequence
program.
Action
Eliminate the cause
of [AL. 24] on the
other axis side.
Check (2).
Eliminate the cause
of [AL. 32] on the
other axis side.
Check (3).
Remove the cause of
the occurring alarm at
other axis.
Action
Reduce the load.
Replace the servo
motor with the one of
larger capacity.
Target
[A]
[B]
[WB]
[RJ010]
[B]
[WB]
[RJ010]
Target
[A]
Target
[WB]
Target
[A]
[B]
[WB]
[RJ010]