Mitsubishi Electric Melservo-J4 Instruction Manual page 64

Alarm No.: 42
Alarm content
Detail Detail name
No.
42.8 Fully closed
loop control
error by position
deviation
42.9 Fully closed
loop control
error by speed
deviation
42.A Fully closed
loop control
error by position
deviation during
command stop
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
62
1.4 Remedies for alarms
Name: Fully closed loop control error detection (during fully closed loop control)
 A fully closed loop control error has occurred.
Cause Check method
(1) The resolution of the Check the setting of [Pr.
load-side encoder PE04] and [Pr. PE05].
setting differs from the
setting value.
(2) The direction of Check the mounting
mounting load-side direction of the load-side
encoder is incorrect. encoder.
(3) The position deviation Check the value of droop
exceeded the detection pulses.
level.
(1) The resolution of the Check the setting of [Pr.
load-side encoder PE04] and [Pr. PE05].
setting differs from the
setting value.
(2) The direction of Check the mounting
mounting load-side direction of the load-side
encoder is incorrect. encoder.
(3) The speed deviation Calculate the deviation
exceeded the detection between the speed
level. command and actual
speed.
Check it with the check method for [AL. 42.8].
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 deviation is large. Review the operation
status. Review the [Pr.
PE07] setting depending
on circumstances.
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 deviation is large. Review the operation
status. Review the [Pr.
PE06] setting depending
on circumstances.
Target
[A]
[B]
[WB]
[GF]