1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 70
Alarm No.: 70
Name: Load-side encoder initial communication error 1
Alarm content
An error occurred in the communication between the load-side encoder and servo amplifier.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
70.3 Load-side
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) The load-side encoder
cable was
disconnected.
Check if the load-side
encoder cable is
connected correctly.
It is not connected.
Connect it correctly. [A]
[B]
[WB]
[GF]
It is connected.
Check (3).
(3) A load-side encoder
cable is malfunctioning.
Check if the load-side
encoder cable is
disconnected or
shorted.
It has a failure.
Replace or repair
the cable.
It has no failure.
Check (4).
(4) The power voltage has
been unstable. (For the
load-side encoder with
the external power
supply input)
Check the power
capacity and voltage.
It has a failure.
Review the power
and related parts.
It has no failure.
Check (5).
(5) The parameter setting
of communication
method is incorrect.
[A]: [Pr. PC44]
[B] [GF]: [Pr. PC26]
Check the parameter
setting.
The setting is
incorrect.
Set it correctly.
[A]
[B]
[GF]
The setting is
correct.
Check (6).
(6) When you use 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 (7).
(7) When you use a four-
wire type linear encoder,
the servo amplifier is not
compatible with the four-
wire type linear encoder.
Check if the servo
amplifier is compatible
with the four-wire type
linear encoder. (MR-
J4-_-RJ)
It is not compatible. Use a servo
amplifier which is
compatible with it.
It is compatible.
Check (8).
(8) 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 (9).
(9) 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 (10).
(10) 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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