Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 50

1. TROUBLESHOOTING
Alarm No.: 56 Name: Forced stop error
Alarm content
Detail
Detail name
No.
56.3 Estimated (1)
distance over
during forced
stop
(2) The torque limit has
(3) The encoder or liner
Alarm No.: 63 Name: STO timing error
Alarm content
Detail
Detail name
No.
63.1 STO1 off (1) STO1 was turned off
63.2 STO2 off (1) STO2 was turned off
The servo motor does not decelerate normally during forced stop deceleration.
Cause
The forced stop Increase the
deceleration time parameter setting
constant value is short. value, and then check
[A]: [Pr. PC51] the repeatability.
[B] [WB] [RJ010]:
[Pr. PC24]
Check if the limiting
been enabled. torque is in progress.
Replace the servo
encoder is motor or linear
malfunctioning. encoder, and then
check the
repeatability.
STO was activated during motor driving.
Cause
Check if STO1 is off.
under the 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 if STO2 is off.
under the 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 method Check result
It is not repeatable.
It is repeatable.
The limiting torque is
in progress.
The limiting torque is
not in progress.
It is not repeatable.
Check method Check result
It is off.
It is off.
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Action Target
Adjust the [A]
deceleration time [B]
constant. [WB]
[RJ010]
Check (2).
Review the torque
limit value.
Check (3).
Replace the servo
motor or linear
encoder.
Action Target
Turn on STO1. [A]
[B]
[WB]
[RJ010]
Turn on STO2.