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

Page: 72 / 174

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 65
Alarm No.: 67 Name: Encoder normal communication error 1 (safety observation function)
Alarm content An error has occurred in the communication between an encoder and servo amplifier.
Detail
No.
Detail name Cause Check method Check result Action Target
67.1 Encoder normal
communication -
Receive data
error 1 (safety
observation
function)
(1) An encoder cable is
malfunctioning.
Check if the encoder
cable is disconnected
or shorted. It has a failure. Repair or replace
the cable. [A]
[B]
[GF]
It has no failure. Check (2).
(2) 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 (3).
(3) 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 (4).
(4) Something near the
device caused it.
Check the noise,
ambient temperature,
vibration, etc. It has a failure. Take
countermeasures
against its cause.
67.2 Encoder normal
communication -
Receive data
error 2 (safety
observation
function)
Check it with the check method for [AL. 67.1].
67.3 Encoder normal
communication -
Receive data
error 3 (safety
observation
function)
67.4 Encoder normal
communication -
Receive data
error 4 (safety
observation
function)
67.7 Encoder normal
communication -
Transmission
data error 1
(safety
observation
function)