Mitsubishi Electric MELSERVO-J4 Instruction Manual page 90

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 84 Name: Network module initialization error
Alarm content
Detail
Detail name
No.
84.1 Network (1) The network module
module
undetected
error
(2) Something near the
(3) The network module is
(4) The servo amplifier is
The network module is not connected.
An error occurred at initialization of the network module.
Cause
Check if the network
was disconnected. module is connected
correctly.
Check the noise,
device caused it. ambient temperature,
etc. Refer to section
11.14 for the noise
reduction techniques.
Replace the network
malfunctioning. module, and then
check the
repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Check method Check result
It is not connected
correctly.
It is connected
correctly.
It has a failure.
It has no failure.
It is not repeatable.
It is repeatable.
It is not repeatable.
1 - 83
Action Target
Connect it correctly. [Other]
Check (2).
Take
countermeasures
against its cause.
Check (3).
Replace the network
module.
Check (4).
Replace the servo
amplifier.