1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 108
Alarm No.: E9
Name: Main circuit off warning
Alarm content
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.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
E9.1 Servo-on
signal
on during main
circuit off
(6) The setting value of [Pr.
PA02 Magnetic
contactor drive output
selection] contradicts
the wiring constitution.
Check the [Pr. PA02]
setting and the wiring
constitution.
The setting or wiring
is incorrect.
Review the setting
of [Pr. PA02].
[A]
[B]
[WB]
[RJ010]
[GF]
The setting and
wiring are correct.
Check (7).
(7) For the MR-J4-03A6(-
RJ) or MR-J4W2-
0303B6 servo amplifier,
24 V DC input is not
selected even though
24 V DC input is used.
Check the parameter
setting.
MR-J4-03A6(-RJ):
[Pr. PC27]
MR-J4W2-0303B6:
[Pr. PC05]
The setting is
incorrect.
Set it correctly.
The setting is
correct.
Check (8).
(8) The bus voltage is low. Check if the bus
voltage is lower than
the prescribed value.
200 V class: 215 V DC
400 V class: 430 V DC
100 V class: 215 V DC
48 V DC setting: 38 V
DC
24 V DC setting: 18 V
DC
The voltage is lower
than the prescribed
value.
Review the wiring.
Check the power
supply capacity.
The voltage is equal
to or higher than the
prescribed value.
Check (9).
(9) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
(10) Replace the
servo amplifier.
(10) For the drive unit, the
converter unit is
malfunctioning.
Replace the converter
unit, and then check
the repeatability.
It is not repeatable.
Replace the
converter unit.
E9.2 Bus
voltage
drop during low
speed operation
(1) The bus voltage
dropped during the
servo motor driving
under 50 r/min.
Check the bus voltage. It is lower than the
prescribed value.
200 V class: 200 V
DC
400 V class: 430 V
DC
100 V class: 200 V
DC
48 V DC setting: 35
V DC
24 V DC setting: 15
V DC
Review the power
supply capacity.
Increase the
acceleration time
constant.
E9.3 Ready-on
signal
on during main
circuit off
Check it with the check method for [AL. E9.1].
E9.4 Converter
unit
forced stop
(1) The forced stop of the
converter unit is
enabled during the
servo-on command.
Check if the forced
stop of the converter
unit is enabled.
It is enabled.
Deactivate the
forced stop of the
converter unit.
[A]
[B]
It is not enabled.
Check (2).
(2) The
protection
coordination cable is
not correctly
connected.
Check the protection
coordination cable.
It is not connected.
Connect the
protection
coordination cable
correctly.
Содержание MELSERVO MR-J4-B-RJ Series
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