Mitsubishi Electric Melservo-J4 Instruction Manual page 62

Alarm No.: 3E
Alarm content
Detail Detail name
No.
3E.1 Operation mode
error
3E.6 Operation mode
switch error
3E.8 MR-D30
combination
error
Alarm No.: 42
Alarm content
Detail Detail name
No.
42.1 Servo control
error by position
deviation
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
60
1.4 Remedies for alarms
Name: Operation mode error
 The operation mode setting was changed.
Cause Check method
(1) The MR-J4 servo Check if the connection
amplifier used in J3 was changed to like
compatibility mode was these.
connected to the other
SSCNET /H
controller. Or an MR-J4
servo amplifier which
was connected to
SSCNET /H controller
was connected to
another SSCNET 
controller.
(2) The [Pr. PA01] setting Check if [Pr. PA01] was
value was changed. changed.
(1) A method of positioning Check if the positioning
data memorized in the mode (point table
servo amplifier (point method/program
table method/program method) was changed.
method) is different
from the actual Positioning mode:
positioning mode (point [Pr. PA01] "_ _ _ x"
table method/program
method).
(1) With CC-Link IE Field Check if MR-D30 is
Network Basic connected.
communication
selected, MR-D30
functional safety unit
was connected.
Name: Servo control error (for linear servo motor and direct drive motor)
 A servo control error occurred.
Cause Check method
(1) The linear encoder Check the setting of [Pr.
resolution setting differs PL02] and [Pr. PL03].
from the setting value.
(2) The direction of Check polarities of the
mounting linear encoder linear encoder and the
is incorrect. linear servo motor.
(3) The connection of the Check the wiring.
servo motor is incorrect.
(4) The initial magnetic Execute the magnetic
pole detection was not pole detection, and then
executed. check the repeatability.
(5) The position deviation Check the value of droop
exceeded the detection pulses.
level.
Check result Action
The connection was Initialize the servo
changed. amplifier with the built-in
application software
"MR-J4(W)-B mode
selection" of MR
Configurator2, and then
connect the amplifier to
the controller.
It was changed. Set [Pr. PA01] correctly.
It was changed. After changing the
(with a purpose) positioning mode,
initialize the point table
method/ program
method. (Refer to section
7.2.8 [Pr. PT34] of "MR-
J4-_A_-RJ Servo
Amplifier Instruction
Manual (Positioning
Mode)")
It was changed by Set the positioning mode
mistake. back to the correct
setting.
It is connected. Disconnect MR-D30.
Check result Action
The setting is incorrect. Set it correctly.
The setting is correct. Check (2).
The mounting direction is Mount it correctly.
incorrect. Review the "encoder
pulse count polarity
selection" setting of the
parameter as required.
[A]: [Pr. PC45]
[B] [WB] [GF]: [Pr. PC27]
The mounting direction is Check (3).
correct.
The wiring is incorrect. Connect it correctly.
The wiring is correct. Check (4).
It is not repeatable. Execute the magnetic
pole detection.
It is repeatable. Check (5).
The deviation is large. Review the operation
status. Review the [Pr.
PL05] setting depending
on circumstances.
Target
[B]
[WB]
[A]
[GF]
Target
[A]
[B]
[WB]
[GF]