Mitsubishi Electric Melservo-J4 Instruction Manual page 57

Alarm No.: 34 Name: SSCNET receive error 1
 An error occurred in SSCNET III/H communication. (continuous communication error with 3.5 ms
Alarm content
interval)
Detail Detail name Cause
No.
34.1 SSCNET (1)
receive data was disconnected.
error
(2) The surface at the end
of SSCNET  cable got
dirty.
(3)
is broken or severed.
(4) A vinyl tape is stacked
to the SSCNET 
cable. Or a wire
insulator containing
migrating plasticizer is
adhered to the cable.
(5) The servo amplifier is
malfunctioning.
(6) The previous or next
axis servo amplifier of
the alarm occurred is
malfunctioning.
(7) The controller is
malfunctioning.
(8)
device caused it.
34.2 SSCNET Check it with the check method for [AL. 34.1].
connector
connection
error
34.3 SSCNET
communication
data error
34.4 Hardware error
signal detection
34.5 SSCNET
receive data
error (safety
observation
function)
34.6 SSCNET
communication
data error
(safety
observation
function)
Check method
The SSCNET  cable Check the SSCNET 
cable connection.
Wipe off the dirt from the
cable tip, and then check
the repeatability.
The SSCNET  cable Check if the SSCNET 
cable is malfunctioning.
Check if a vinyl tape is
used. Check if the cable
is contacting with other
cables.
Replace the servo
amplifier, and then check
the repeatability.
Replace the previous
and next servo amplifier
of the axis alarm
occurred, and then check
the repeatability.
Replace the controller,
and then check the
repeatability.
Something near the Check the noise, ambient
temperature, etc.
Check result
It is disconnected.
It is connected.
It is not repeatable.
It is repeatable.
It has a failure.
It has no failure.
It is used. They are in
contact.
It is not used. They are
not in contact.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
There is a problem in the
surrounding.
1 TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Action Target
Turn off the control circuit [B]
power supply of the [WB]
servo amplifier, and then
connect the SSCNET 
cable.
Check (2).
Take measure to keep
the cable tip clean.
Check (3).
Replace the SSCNET 
cable.
Check (4).
Take countermeasures
against its cause.
Check (5).
Replace the servo
amplifier.
Check (6).
Replace the servo
amplifier.
Check (7).
Replace the controller.
Check (8).
Take countermeasures
against its cause.
1.4 Remedies for alarms
1
55