Mitsubishi Electric Melservo-J4 Instruction Manual page 84

Alarm No.: 70
Alarm content
Detail Detail name
No.
70.B Load-side
encoder initial
communication
- Process error
2
70.C Load-side
encoder initial
communication
- Process error
3
70.D Load-side
encoder initial
communication
- Process error
4
70.E Load-side
encoder initial
communication
- Process error
5
70.F Load-side
encoder initial
communication
- Process error
6
Alarm No.: 71
Alarm content
Detail Detail name
No.
71.1 Load-side
encoder normal
communication
- Receive data
error 1
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
82
1.4 Remedies for alarms
Name: Load-side encoder initial communication error 1
 An error occurred in the initial communication between the load-side encoder and servo amplifier.
Cause Check method
Check it with the check method for [AL. 70.A].
Name: Load-side encoder normal communication error 1
 An error occurred in the communication between the load-side encoder and servo amplifier.
Cause Check method
(1) A load-side encoder Check if the load-side
cable is malfunctioning. encoder cable is
disconnected or shorted.
(2) The external conductor Check if it is connected.
of the encoder cable is
not connected to the
ground plate of the
connector.
(3) The parameter setting Check the parameter
of communication setting.
method is incorrect.
[A]: [Pr. PC44]
[B] [GF]: [Pr. PC26]
(4) The servo amplifier is Replace the servo
malfunctioning. amplifier, and then check
the repeatability.
(5) A load-side encoder is Replace the load-side
malfunctioning. encoder, and then check
the repeatability.
(6) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
Check result Action
Check result Action
It has a failure. Repair or replace the
cable.
It has no failure. Check (2).
It is not connected. Connect it correctly.
It is connected. Check (3).
The setting is incorrect. Set it correctly.
The setting is correct. Check (4).
It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (5).
It is not repeatable. Replace the load-side
encoder.
It is repeatable. Check (6).
There is a problem in the Take countermeasures
surrounding. against its cause.
Target
Target
[A]
[B]
[WB]
[GF]
[A]
[B]
[GF]
[A]
[B]
[WB]
[GF]