
1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 91
Alarm No.: 8E
Name: USB communication error/serial communication error/Modbus-RTU communication error
Alarm content
A communication error occurred between the servo amplifier and a personal computer/controller.
An error occurred in USB communication, serial communication (Mitsubishi general-purpose AC servo
protocol), or Modbus-RTU communication.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
8E.6 Modbus-RTU
communication
receive error
(1) The setting of the
controller, servo
amplifier, etc. is
incorrect.
Check the setting of
the controller, servo
amplifier, etc. (such as
communication
protocol selection,
baud rate, parity).
It is incorrect.
Review the settings. [A]
It is correct.
Check (2).
(2) A communication cable
is malfunctioning.
Check the
communication cable,
and then check the
repeatability.
It is not repeatable.
Replace the
communication
cable.
It is repeatable.
Check (3).
(3) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
Replace the servo
amplifier.
8E.7 Modbus-RTU
communication
message frame
error
(1) The
communication
protocol is failure.
Check if transmission
data conforms the
communication
protocol.
It is not conforming. Modify the
transmission data
according to the
communication
protocol.
It is conforming.
Check (2).
(2) The setting of the
controller, servo
amplifier, etc. is
incorrect.
Check the setting of
the controller, servo
amplifier, etc. (such as
communication
protocol selection,
baud rate, parity).
It is incorrect.
Review the settings.
8E.8 Modbus-RTU
communication
CRC error
Check it with the check method for [AL. 8E.7].
Alarm No.: 88888
Name: Watchdog
Alarm content
[RJ010]: MR-J3-T10 came off.
A part such as CPU is malfunctioning.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
88._/
8888._
Watchdog
(1) The MR-J3-T10 came
off during the CC-Link
IE communication.
Check if [AL. 74
Option card error 1]
occurred with alarm
history.
It is occurring.
Check it with the
check method for
[AL. 74].
[RJ010]
It did not occur.
Check (2).
(2) A part in the servo
amplifier is failure.
Replace the servo
amplifier, and then
check the
repeatability.
It is not repeatable.
Replace the servo
amplifier.
[A]
[B]
[WB]
[RJ010]
[GF]
Содержание MELSERVO MR-J4-B-RJ Series
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Страница 137: ...1 TROUBLESHOOTING FOR SERVO AMPLIFIER DRIVE UNIT 1 130 MEMO ...
Страница 145: ...2 TROUBLESHOOTING FOR MR CV_POWER REGENERATION CONVERTER UNIT 2 8 MEMO ...
Страница 155: ...3 TROUBLESHOOTING FOR MR CR55K 4 RESISTANCE REGENERATION CONVERTER UNIT 3 10 MEMO ...
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