Mitsubishi Electric Melservo-J4 Instruction Manual page 38

Alarm No.: 16
Alarm content
Detail Detail name
No.
16.3 Encoder initial
communication
- Receive data
error 3
16.4 Encoder initial
communication
- Encoder
malfunction
16.5 Encoder initial
communication
- Transmission
data error 1
16.6 Encoder initial
communication
- Transmission
data error 2
16.7 Encoder initial
communication
- Transmission
data error 3
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
36
1.4 Remedies for alarms
Name: Encoder initial communication error 1
 An error occurred in the communication between an encoder and servo amplifier.
Cause Check method
(1) An axis not used is not Check the setting of the
set as disabled-axis. disabling control axis
switches (SW2-2/SW2-3/
SW2-4).
(2) An encoder cable was Check if the encoder
disconnected. cable is connected
correctly.
(3) The parameter setting Check the parameter
of communication setting.
method is incorrect.
[A]: [Pr. PC22]
[B] [WB] [RJ010] [GF]:
[Pr. PC04]
(4) In the parallel drive Check the parameter
system, the setting of setting.
[Pr. PF40] is incorrect.
(5) An encoder cable is Check if the encoder
malfunctioning. cable is disconnected or
shorted.
(6) When you use a linear Check if the wiring of the
servo motor with an A/ linear encoder is correct.
B/Z-phase differential (Check if it is wired to
output linear encoder, PSEL.)
the connection with the
linear encoder is
incorrect.
(7) The voltage of the Check the voltage of the
control circuit power control circuit power
supply has been supply.
unstable.
(8) The servo amplifier is Replace the servo
malfunctioning. amplifier, and then check
the repeatability.
(9) An encoder is Replace the servo motor,
malfunctioning. and then check the
repeatability.
(10) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
(1) An encoder is Replace the servo motor,
malfunctioning. and then check the
repeatability.
(2) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
Check it with the check method for [AL. 16.1].
Check result Action
It is not set as disabled- Set it as disabled-axis.
axis.
It is set as disabled-axis. 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).
The setting is incorrect. Set it correctly.
The setting is correct. Check (5).
It has a failure. Replace or repair the
cable.
It has no failure. Check (6).
The wiring is incorrect. Wire it correctly.
The wiring is correct. Check (7).
An instantaneous power Review the power and
failure is occurring at the related parts.
control circuit power
supply.
It has no failure. Check (8).
It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (9).
It is not repeatable. Replace the servo motor.
It is repeatable. Check (10).
There is a problem in the Take countermeasures
surrounding. against its cause.
It is not repeatable. Replace the servo motor.
It is repeatable. Check (2).
There is a problem in the Take countermeasures
surrounding. against its cause.
Target
[WB]
[A]
[B]
[WB]
[RJ010]
[GF]
[B]
[A]
[B]
[WB]
[RJ010]
[GF]
[A]
[B]
[GF]
[A]
[B]
[WB]
[RJ010]
[GF]
[B]
[WB]