10 Troubleshooting
10.1.1 List of Alarms
10-4
A.860
Encoder Overheated
The internal temperature of encoder is too
high.
Gr.1
N/A
H
H
H
A.8A0
External Encoder Error
External encoder is faulty.
Gr.1
Available
H
H
H
A.8A1
External Encoder Error of
Module
Serial converter unit is faulty.
Gr.1
Available
H
H
H
A.8A2
External Encoder Error of
Sensor
External encoder is faulty.
Gr.1
Available
H
H
H
A.8A3
External Encoder Error of
Position
The position data of external encoder is
faulty.
Gr.1
Available
H
H
H
A.8A5
External Encoder Over-
speed
The overspeed from the external encoder
occurred.
Gr.1
Available
H
H
H
A.8A6
External Encoder Over-
heated
The overheat from the external encoder
occurred.
Gr.1
Available
H
H
H
A.A
*1
SERVOPACK: Command
Option Module Alarms
−
−
−
−
−
−
A.b10
Speed Reference A/D
Error
The A/D converter for speed reference
input is faulty.
Gr.2
Available
H
H
H
A.b11
Speed Reference A/D
Data Error
A/D conversion data of speed reference
input is incorrect.
Gr.2
Available
H
H
H
A.b20
Reference Torque
Input Read Error
The A/D converter for torque reference
input is faulty.
Gr.2
Available
H
H
H
A.b31
Current Detection Error 1
The current detection circuit for phase U is
faulty.
Gr.1
N/A
H
H
H
A.b32
Current Detection Error 2
The current detection circuit for phase V is
faulty.
Gr.1
N/A
H
H
H
A.b33
Current Detection Error 3
The detection circuit for the current is
faulty.
Gr.1
N/A
H
H
H
A.bF0
System Alarm 0
"Internal program error 0" of the SERVO-
PACK occurred.
Gr.1
N/A
H
H
H
A.bF1
System Alarm 1
"Internal program error 1" of the SERVO-
PACK occurred.
Gr.1
N/A
H
H
H
A.bF2
System Alarm 2
"Internal program error 2" of the SERVO-
PACK occurred.
Gr.1
N/A
H
H
H
A.bF3
System Alarm 3
"Internal program error 3" of the SERVO-
PACK occurred.
Gr.1
N/A
H
H
H
A.bF4
System Alarm 4
"Internal program error 4" of the SERVO-
PACK occurred.
Gr.1
N/A
H
H
H
A.C10
Servo Overrun Detected
The servomotor ran out of control.
Gr.1
Available
L
H
L
A.C80
Absolute Encoder Clear
Error and Multiturn Limit
Setting Error
The multiturn for the absolute encoder was
not properly cleared or set.
Gr.1
N/A
L
H
L
A.C90
Encoder Communications
Error
Communications between the SERVO-
PACK and the encoder is not possible.
Gr.1
N/A
L
H
L
A.C91
Encoder Communications
Position Data Error
An encoder position data calculation error
occurred.
Gr.1
N/A
L
H
L
A.C92
Encoder Communications
Timer Error
An error occurs in the communications
timer between the encoder and the SER-
VOPACK.
Gr.1
N/A
L
H
L
A.CA0
Encoder Parameter Error
Encoder parameters are faulty.
Gr.1
N/A
L
H
L
A.Cb0
Encoder Echoback Error
Contents of communications with encoder
are incorrect.
Gr.1
N/A
L
H
L
∗1.
These alarms occur in SERVOPACKs with command option modules.
For details, refer to the manual for the command option module that is connected.
(cont’d)
Alarm
Number
Alarm Name
Meaning
Servomotor
Stopping
Method
Alarm
Reset
Alarm Code Output
ALO1 ALO2 ALO3
