1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 71
Alarm No.: 70
Name: Load-side encoder initial communication error 1
Alarm content
An error occurred in the initial communication between the load-side encoder and servo amplifier.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
70.5 Load-side
encoder initial
communication
- Transmission
data error 1
(1) When you use an
A/B/Z-phase differential
output linear encoder,
the wiring of the linear
encoder is incorrect.
Check if the A/B-
phase pulse signals
(PA, PAR, PB, and
PBR) of the encoder
cable are
disconnected or
shorted.
It is disconnected or
shorted.
Repair the encoder
cable.
[A]
[B]
[GF]
It is not disconnected
or shorted.
Check (2).
(2) A load-side encoder
cable is malfunctioning.
Check it with the check method for [AL. 70.1].
[A]
[B]
[WB]
[GF]
(3) The servo amplifier is
malfunctioning.
(4) A load-side encoder is
malfunctioning.
(5) Something near the
device caused it.
70.6 Load-side
encoder initial
communication
- Transmission
data error 2
(1) When you use an
A/B/Z-phase differential
output linear encoder,
the wiring of the linear
encoder is incorrect.
Check if the Z-phase
pulse signals
(PZ/PZR) of the
encoder cable are
disconnected or
shorted.
It is disconnected or
shorted.
Repair the encoder
cable.
[A]
[B]
[GF]
It is not disconnected
or shorted.
Check (2).
(2) A load-side encoder
cable is malfunctioning.
Check it with the check method for [AL. 70.1].
[A]
[B]
[WB]
[GF]
(3) The servo amplifier is
malfunctioning.
(4) A load-side encoder is
malfunctioning.
(5) Something near the
device caused it.
70.7 Load-side
encoder initial
communication
- Transmission
data error 3
Check it with the check method for [AL. 70.1].
70.A Load-side
encoder initial
communication -
Process error 1
(1) 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]
[GF]
It is repeatable.
Check (2).
(2) A load-side encoder is
malfunctioning.
Replace the load-side
encoder, and then
check the
repeatability.
It is not repeatable.
Replace the load-
side encoder.
It is repeatable.
Check (3).
(3) Something near the
device caused it.
Check the noise,
ambient temperature,
vibration, etc.
It has a failure.
Take
countermeasures
against its cause.
Содержание MELSERVO MR-J4-B-RJ Series
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