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

Page: 31 / 174

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 24
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
16.1 Encoder initial
communication
- Receive data
error 1
(1) An encoder cable is
malfunctioning.
Check if the encoder
cable is disconnected
or shorted. It has a failure. Replace or repair
the cable. [A]
[B]
[WB]
[RJ010]
[GF]
It has no failure. Check (2).
(2) When you use a linear
servo motor with an
A/B/Z-phase differential
output linear encoder,
the servo amplifier is
not compatible with the
linear encoder.
Check if the servo
amplifier (MR-J4-_-RJ)
is compatible with the
A/B/Z-phase
differential output
linear encoder. The servo amplifier
is not compatible
with it. Use a servo
amplifier which is
compatible with it. [A]
[B]
[GF]
The servo amplifier
is compatible with it. Check (3).
(3) 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.
The wiring is
correct. Check (4).
(4) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability. It is not repeatable. Replace the servo
amplifier. [A]
[B]
[WB]
[RJ010]
[GF]
It is repeatable. Check (5).
(5) An encoder is
malfunctioning.
Replace the servo
motor or linear
encoder, and then
check the
repeatability. It is not repeatable. Replace the servo
motor.
It is repeatable. Check (6).
(6) Something near the
device caused it.
Check the noise,
ambient temperature,
vibration, etc. It has a failure. Take
countermeasures
against its cause.
16.2 Encoder initial
communication
- Receive data
error 2
Check it with the check method for [AL. 16.1].