Mitsubishi Electric MELSERVO-J4 Instruction Manual page 72

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 67 Name: Encoder normal communication error 1 (safety observation function)
Alarm content
Detail
Detail name
No.
67.1 Encoder normal (1) An encoder cable is
communication -
Receive data
error 1 (safety
(2) The servo amplifier is
observation
function)
(3) An encoder is
(4) Something near the
67.2 Encoder normal Check it with the check method for [AL. 67.1].
communication -
Receive data
error 2 (safety
observation
function)
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)
An error has occurred in the communication between an encoder and servo amplifier.
Cause
Check if the encoder
malfunctioning. cable is disconnected
or shorted.
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 has a failure.
It has no failure.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
It has a failure.
1 - 65
Action Target
Repair or replace [A]
the cable. [B]
[GF]
Check (2).
Replace the servo
amplifier.
Check (3).
Replace the servo
motor.
Check (4).
Take
countermeasures
against its cause.