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9 Troubleshooting
9.1.1 List of Alarms
Alarm
Alarm Name
Number
A.860
Encoder Overheated
Speed Reference A/D
A.b10
Error
Speed Reference A/D
A.b11
Data Error
Reference Torque
A.b20
Input Read Error
A.b31* Current Detection Error 1
A.b32* Current Detection Error 2
A.b33* Current Detection Error 3
A.bF0
System Alarm 0
A.bF1
System Alarm 1
A.bF2
System Alarm 2
A.bF3
System Alarm 3
A.bF4
System Alarm 4
A.C10
Servo Overrun Detected
Absolute Encoder Clear
A.C80
Error and Multiturn Limit
Setting Error
Encoder Communications
A.C90
Error
Encoder Communications
A.C91
Position Data Error
Encoder Communications
A.C92
Timer Error
A.CA0
Encoder Parameter Error
A.Cb0
Encoder Echoback Error
Multiturn Limit
A.CC0
Disagreement
A.d00
Position Error Overflow
Position Error Overflow
A.d01
Alarm at Servo ON
Position Error Overflow
A.d02
Alarm by Speed Limit at
Servo ON
Safety Function Signal
A.Eb1*
Input Timing Error
9-4
Meaning
The internal temperature of encoder is too
high.
The A/D converter for speed reference
input is faulty.
A/D conversion data of speed reference
input is incorrect.
The A/D converter for torque reference
input is faulty.
The current detection circuit for phase U is
faulty.
The current detection circuit for phase V is
faulty.
The detection circuit for the current is
faulty.
Internal program error 0 occurred.
Internal program error 1 occurred.
Internal program error 2 occurred.
Internal program error 3 occurred.
Internal program error 4 occurred.
The servomotor ran out of control.
The multiturn for the absolute encoder was
not properly cleared or set.
Communications between the multi-wind-
ing drive unit and the encoder are not pos-
sible.
An encoder position data calculation error
occurred.
An error occurred in the communications
timer between the encoder and the multi-
winding drive unit.
Encoder parameters are faulty.
Contents of communications with encoder
are incorrect.
Different multiturn limits have been set in
the encoder and the multi-winding drive
unit.
Position error exceeded the value of exces-
sive position error alarm level (Pn520)
when the servomotor power is ON.
This alarm occurs if the servomotor power
is turned ON when the position error is
greater than the set value of Pn526 while
the servomotor power is OFF.
When the position errors remain in the
error counter, Pn529 limits the speed if the
servomotor power is turned ON. If Pn529
limits the speed in such a state, this alarm
occurs when reference pulses are input and
the number of position errors exceeds the
value set for the excessive position error
alarm level (Pn520).
The safety function signal input timing is
faulty.
Servomotor
Alarm Code Output
Alarm
Stopping
Reset
ALO1 ALO2 ALO3
Method
Gr.1
N/A
H
Gr.2
Available
H
Gr.2
Available
H
Gr.2
Available
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
N/A
H
Gr.1
Available
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
N/A
L
Gr.1
Available
L
Gr.1
Available
L
Gr.2
Available
L
Gr.1
N/A
H
(cont'd)
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
L
H
L
H
L
H
L
L
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Table of Contents
Troubleshooting
