Mitsubishi Electric Melservo-J4 Instruction Manual page 74

Alarm No.: 56
Alarm content
Detail Detail name
No.
56.4 Forced stop
start error
Alarm No.: 61
Alarm content
Detail Detail name
No.
61.1 Point table
setting range
error
Alarm No.: 63
Alarm content
Detail Detail name
No.
63.1 STO1 off
63.2 STO2 off
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
72
1.4 Remedies for alarms
Name: Forced stop error
 The servo motor does not decelerate normally during forced stop deceleration.
Cause Check method
(1) The SSCNET III cable Check if the SSCNET III
is disconnected. cable is connected
correctly.
(2) The SSCNET III cable Check if the SSCNET III
is malfunctioning. cable is disconnected or
shorted.
(3) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
(4) The servo amplifier is Replace the servo
malfunctioning. amplifier, and then check
the repeatability.
(5) The controller is Replace the controller,
malfunctioning. and then check the
repeatability.
Name: Operation error
 An operation of the positioning function failed.
Cause Check method
(1) "1" or "3" was set to the Check if "1" or "3" was
sub function of the last set.
point table (255).
Name: STO timing error
 STO input signal turns off while the servo motor is rotating.
Cause Check method
(1) STO1 was turned off Check if STO1 is off
(enabled) under the (enabled).
following speed
conditions.
1) Servo motor speed:
50 r/min or more
2) Linear servo motor
speed: 50 mm/s or
more
3) Direct drive motor
speed: 5 r/min or
more
(1) STO2 was turned off Check if STO2 is off
(enabled) under the (enabled).
following speed
conditions.
1) Servo motor speed:
50 r/min or more
2) Linear servo motor
speed: 50 mm/s or
more
3) Direct drive motor
speed: 5 r/min or
more
Check result Action
It is not connected. Connect it correctly.
It is connected. Check (2).
It has a failure. Replace or repair the
cable.
It has no failure. Check (3).
There is a problem in the Take countermeasures
surrounding. against its cause.
There is no problem in Check (4).
the surrounding.
It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (5).
It is not repeatable. Replace the controller.
Check result Action
It was set. Review the settings.
Check result Action
It is off (enabled). Turn on STO1 (disabled).
It is off (enabled). Turn on STO2 (disabled).
Target
[B]
Target
[A]
[GF]
Target
[A]
[B]
[WB]
[RJ010]
[GF]