Mitsubishi Electric Melservo-J4 Instruction Manual page 82

Alarm No.: 70
Alarm content
Detail Detail name
No.
70.3 Load-side
encoder initial
communication
- Receive data
error 3
70.4 Load-side
encoder initial
communication
- Encoder
malfunction
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
80
1.4 Remedies for alarms
Name: Load-side encoder initial communication error 1
 An error occurred in the initial communication between the load-side encoder and servo amplifier.
Cause Check method
(1) An axis not used is not Check the setting of the
set as disabled-axis. disabling control axis
switches (SW2-2/SW2-3/
SW2-4).
(2) The load-side encoder Check if the load-side
cable was encoder cable is
disconnected. connected correctly.
(3) A load-side encoder Check if the load-side
cable is malfunctioning. encoder cable is
disconnected or shorted.
(4) The power voltage has Check the power
been unstable. (For the capacity and voltage.
load-side encoder with
the external power
supply input)
(5) The parameter setting Check the parameter
of communication setting.
method is incorrect.
[A]: [Pr. PC44]
[B] [GF]: [Pr. PC26]
(6) When you use an A/B/ Check if the wiring of the
Z-phase differential linear encoder is correct.
output linear encoder, (Check if it is wired to
the connection with the PSEL.)
linear encoder is
incorrect.
(7) When you use a four- Check if the servo
wire type linear amplifier is compatible
encoder, the servo with the four-wire type
amplifier is not linear encoder. (MR-J4-
compatible with the _-RJ)
four-wire type linear
encoder.
(8) The servo amplifier is Replace the servo
malfunctioning. amplifier, and then check
the repeatability.
(9) A load-side encoder is Replace the load-side
malfunctioning. encoder, and then check
the repeatability.
(10) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
(1) A load-side encoder is Replace the load-side
malfunctioning. encoder, and then check
the repeatability.
(2) Something near the Check the noise, ambient
device caused it. temperature, vibration,
etc.
Check result Action
It is not set as disabled- Set it as disabled-axis.
axis.
It is set as disabled-axis. Check (2).
It is not connected. Connect it correctly.
It is connected. Check (3).
It has a failure. Replace or repair the
cable.
It has no failure. Check (4).
It has a failure. Review the power and
related parts.
It has no failure. Check (5).
The setting is incorrect. Set it correctly.
The setting is correct. Check (6).
The wiring is incorrect. Wire it correctly.
The wiring is correct. Check (7).
It is not compatible. Use a servo amplifier
which is compatible with
it.
It is compatible. Check (8).
It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (9).
It is not repeatable. Replace the load-side
encoder.
It is repeatable. Check (10).
There is a problem in the Take countermeasures
surrounding. against its cause.
It is not repeatable. Replace the load-side
encoder.
It is repeatable. Check (2).
There is a problem in the Take countermeasures
surrounding. against its cause.
Target
[WB]
[A]
[B]
[WB]
[GF]
[A]
[B]
[GF]
[A]
[B]
[WB]
[GF]
[B]
[WB]