Mitsubishi Electric MELSERVO MR-J4-B-RJ Series, Instruction Manual

Page: 32 / 174

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 25
Alarm No.: 16 Name: Encoder initial communication error 1
Alarm content An error occurred in the communication between an encoder and servo amplifier.
Detail
No.
Detail name Cause Check method Check result Action Target
16.3 Encoder initial
communication
- Receive data
error 3
(1) An axis not used is not
set as disabled-axis.
Check the setting of
the disabling control
axis switches (SW2-
2/SW2-3/SW2-4). It is not set as
disabled-axis. Set it as disabled-
axis. [WB]
It is set as disabled-
axis. Check (2).
(2) An encoder cable was
disconnected.
Check if the encoder
cable is connected
correctly. It is not connected. Connect it correctly. [A]
[B]
[WB]
[RJ010]
[GF]
It is connected. Check (3).
(3) The parameter setting
of communication
method is incorrect.
[A]: [Pr. PC22]
[B] [WB] [RJ010] [GF]:
[Pr. PC04]
Check the parameter
setting. The setting is
incorrect. Set it correctly.
The setting is
correct. Check (4).
(4) An encoder cable is
malfunctioning.
Check if the encoder
cable is disconnected
or shorted. It has a failure. Replace or repair
the cable.
It has no failure. Check (5).
(5) When you use a linear
servo motor with an
A/B/Z-phase differential
output linear encoder,
the connection with the
linear encoder is
incorrect.
Check if the wiring of
the linear encoder is
correct. (Check if it is
wired to PSEL.) The wiring is
incorrect. Wire it correctly. [A]
[B]
[GF]
The wiring is
correct. Check (6).
(6) The voltage of the
control circuit power
supply has been
unstable.
Check the voltage of
the control circuit
power supply. An instantaneous
power failure is
occurring at the
control circuit power
supply. Review the power
and related parts. [A]
[B]
[WB]
[RJ010]
[GF]
It has no failure. Check (7).
(7) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability. It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (8).
(8) An encoder is
malfunctioning.
Replace the servo
motor, and then
check the
repeatability. It is not repeatable. Replace the servo
motor.
It is repeatable. Check (9).
(9) Something near the
device caused it.
Check the noise,
ambient temperature,
vibration, etc. It has a failure. Take
countermeasures
against its cause.
16.5 Encoder initial
communication
- Transmission
data error 1
Check it with the check method for [AL. 16.1].
16.6 Encoder initial
communication
- Transmission
data error 2
16.7 Encoder initial
communication
- Transmission
data error 3