Mitsubishi Electric Melservo-J4 Instruction Manual page 39

Alarm No.: 16 Name: Encoder initial communication error 1
 An error occurred in the communication between an encoder and servo amplifier.
Alarm content
Detail Detail name Cause
No.
16.8 Encoder initial (1)
communication encoder, which is not
- Incompatible compatible with the
encoder servo amplifier, was
connected.
(2) The software version of
the servo amplifier does
not support the servo
motor or linear encoder.
(3) An encoder is
malfunctioning.
16.A Encoder initial (1) The servo amplifier is
communication malfunctioning.
- Process error
1
(2) An encoder is
malfunctioning.
(3)
device caused it.
16.B Encoder initial Check it with the check method for [AL. 16.A].
communication
- Process error
2
16.C Encoder initial
communication
- Process error
3
16.D Encoder initial
communication
- Process error
4
16.E Encoder initial
communication
- Process error
5
16.F Encoder initial
communication
- Process error
6
Alarm No.: 17 Name: Board error
 A part in the servo amplifier is malfunctioning.
Alarm content
Detail Detail name Cause
No.
17.1 Board error 1 (1)
circuit is malfunctioning.
(2)
device caused it.
17.3 Board error 2 Check it with the check method for [AL. 17.1].
Check method
A servo motor or linear Check the model of the
servo motor/linear
encoder.
Check if the software
version supports the
servo motor/linear
encoder.
Replace the servo motor
or linear encoder, and
then check the
repeatability.
Replace the servo
amplifier, and then check
the repeatability.
Replace the servo motor,
and then check the
repeatability.
Something near the Check the noise, ambient
temperature, vibration,
etc.
Check method
A current detection Check if the alarm occurs
during the servo-on
status.
Something near the Check the noise, ambient
temperature, etc.
Check result
It is not compatible with
the servo amplifier.
It is compatible with the
servo amplifier.
It is not compatible.
It is compatible.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
There is a problem in the
surrounding.
Check result
It occurs.
It does not occur.
There is a problem in the
surrounding.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Action Target
Replace it with a [B]
compatible one. [WB]
Check (2).
Replace the servo
amplifier to one which
software version
supports the servo
motor/linear encoder.
Check (3).
Replace the servo motor
or linear encoder.
Replace the servo
amplifier.
Replace the servo [A]
amplifier. [B]
[WB]
Check (2).
[RJ010]
Replace the servo motor.
[GF]
Check (3).
Take countermeasures
against its cause.
Action Target
Replace the servo [A]
amplifier. [B]
[WB]
Check (2).
[RJ010]
Take countermeasures
[GF]
against its cause.
1.4 Remedies for alarms
1
37