8 - 6
8. TROUBLESHOOTING
Alarm No.: A.16
Name: Encoder initial communication error 1
Description
Communication error occurred between the encoder and the servo amplifier.
Detailed
display
Detailed
Name
Cause
Checking method
Result
Action
16.0
Encoder
transmission
data error
1) Encoder cable faulty
Check the shield
status.
Error in the shield.
Repair the cable.
No error in the
shield.
Check 2).
2) Fault in the surrounding
environment
Check the noise, the
ambient temperature,
etc.
An error is found.
Take the appropriate
measures according to the
cause.
No error.
Check 3).
3) Servo amplifier fault
Check if the alarm
occurs again.
Alarm occurs.
Replace the servo
amplifier.
Alarm does not
occur.
Execute the checking
methods mentioned in the
alarm display "16.3".
16.1
Encoder
transmission
data error 1
(Servo
amplifier
receive
error)
1) Encoder cable faulty
Execute the checking methods mentioned in the alarm display "16.0".
2) Fault in the surrounding
environment
3) Servo amplifier fault
16.2
Encoder
transmission
data error 2
(Frame
error)
1) Encoder cable faulty
Execute the checking methods mentioned in the alarm display "16.0".
2) Fault in the surrounding
environment
3) Servo amplifier fault
16.3
Encoder
transmission
data error 3
(The servo
amplifier not
receiving)
1) Encoder cable is
disconnected.
Check if the encoder
cable is connected
correctly.
Disconnected.
Connect correctly.
Connected
correctly.
Check 2).
2) Encoder cable faulty
Check if the encoder
cable is disconnected
or shorted.
Check the shield
status.
An error is found.
Repair or replace the
cable.
No error.
Check 3).
3) Encoder cable type (2-
wire, 4-wire) selection is
incorrect in the parameter
setting.
Check the set value of
parameter No.PC22.
2-wire: "0 "
4-wire: "1 "
Incorrect set value
is set.
Set correctly.
No problem.
Check 4).
4) Encoder fault
Check if the alarm
occurs after replacing
the servo motor.
Alarm does not
occur.
Replace the servo motor.
Alarm occurs.
Check 5).
5) Servo amplifier fault
Check if the alarm
occurs after replacing
the servo amplifier.
Alarm does not
occur.
Replace the servo
amplifier.
Alarm occurs.
Check 6).
6) Fault in the surrounding
environment
Check the noise, etc.
An error is found.
Take the appropriate
measures according to the
cause.
Summary of Contents for MELSERVO-JN Series
Page 31: ... 22 MEMO ...
Page 49: ...2 6 2 INSTALLATION MEMO ...
Page 181: ...5 30 5 DISPLAY AND OPERATION SECTIONS MEMO ...
Page 199: ...6 18 6 GENERAL GAIN ADJUSTMENT MEMO ...
Page 303: ...11 46 11 OPTIONS AND PERIPHERAL EQUIPMENT MEMO ...
Page 351: ...12 48 12 SERVO MOTOR MEMO ...
Page 445: ...13 94 13 POSITIONING MODE MEMO ...