1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 90
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.3 USB
communication
character
error/serial
communication
character error
(1) The
transmitted
character is out of
specifications.
Check the character
code at the time of
transmission.
The transmitted
character is out of
specifications.
Correct the
transmission data.
[A]
[B]
[WB]
[RJ010]
The
transmitted
character is within
specifications.
Check (2).
(2)
The
communication
protocol is failure.
Check if transmission
data supports the
communication
protocol.
It is not conforming. Modify the
transmission data
according to the
communication
protocol.
It is conforming.
Check (3).
(3) The setting of the
personal computer, etc.
is incorrect.
Check the setting of
the personal
computer, etc.
It is incorrect.
Review the settings.
8E.4 USB
communication
command
error/serial
communication
command error
(1) The
transmitted
command is out of
specifications.
Check the command
at the time of
transmission.
The transmitted
command is out of
specifications.
Correct the
transmission data.
[A]
[B]
[WB]
[RJ010]
The
transmitted
command is within
specifications.
Check (2).
(2)
The
communication
protocol is failure.
Check if transmission
data supports the
communication
protocol.
It is not conforming. Modify the
transmission data
according to the
communication
protocol.
It is conforming.
Check (3).
(3) The setting of the
personal computer, etc.
is incorrect.
Check the setting of
the personal
computer, etc.
It is incorrect.
Review the settings.
8E.5 USB
communication
data number
error/serial
communication
data number
error
(1) The transmitted data
number is out of
specifications.
Check the data
number at the time of
transmission.
The transmitted
data number is out
of specifications.
Correct the
transmission data.
[A]
[B]
[WB]
[RJ010]
The transmitted data
number is within
specifications.
Check (2).
(2)
The
communication
protocol is failure.
Check if transmission
data supports the
communication
protocol.
It is not conforming. Modify the
transmission data
according to the
communication
protocol.
It is conforming.
Check (3).
(3) The setting of the
personal computer, etc.
is incorrect.
Check the setting of
the personal
computer, etc.
It is incorrect.
Review the settings.
Содержание MELSERVO MR-J4-B-RJ Series
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