Mitsubishi Electric MELSERVO-J4 Instruction Manual Trouble Shooting page 20

1. TROUBLESHOOTING
Alarm No.: 16 Name: Encoder initial communication error 1
Alarm content
Detail
Detail name
No.
16.3 Encoder initial (1)
communication
- Receive data
error 3
(2)
(3)
(4)
(5)
(6) The voltage of the
(7) The servo amplifier is
(8) An encoder is
(9) Something near the
16.5 Encoder initial Check it with the check method for [AL. 16.1].
communication
- Transmission
data error 1
16.6 Encoder initial
communication
- Transmission
data error 2
16.7 Encoder initial
communication
- Transmission
data error 3
Communication error occurred between encoder and servo amplifier.
Cause
An axis not used is not Check the setting of
set as disabled-axis. the disabling control
axis switch (SW2-2,
SW2-3 and SW2-4).
An encoder cable was Check if the encoder
disconnected. cable is connected
correctly.
The parameter setting Check the parameter
of two-wire type/four- setting.
wire type is incorrect.
[A]: [Pr. PC22]
[B] [WB] [RJ010]:
[Pr. PC04]
An encoder cable is Check if the encoder
malfunctioning. cable is disconnected
or shorted.
When you use a linear Check if the wiring of
servo motor with an the linear encoder is
A/B/Z-phase differential correct. (Check if it is
output linear encoder, wired to PSEL.)
the connection with the
linear encoder is
incorrect.
Check the voltage of
control circuit power the control circuit
supply has been power supply.
unstable.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Replace the servo
malfunctioning. motor, and then check
the repeatability.
Check the noise,
device caused it. ambient temperature,
vibration, etc.
Check method Check result
It is not set as
disabled-axis.
It is set as disabled-
axis.
It is not connected.
It is connected.
The setting is
incorrect.
The setting is correct. Check (4).
It has a failure.
It has no failure.
The wiring is
incorrect.
The wiring is correct.
The control circuit
power supply has
been an
instantaneous power
failure.
It has no failure.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
It has a failure.
1 - 13
Action Target
Set it as disabled- [WB]
axis.
Check (2).
Connect it correctly. [A]
[B]
Check (3).
[WB]
[RJ010]
Set it correctly.
Replace or repair the
cable.
Check (5).
Wire it correctly. [A]
[B]
Check (6).
Review the power [A]
and related parts. [B]
[WB]
[RJ010]
Check (7).
Replace the servo
amplifier.
Check (8).
Replace the servo
motor.
Check (9).
Take
countermeasures
against its cause.