11 Inspection, Maintenance, and Troubleshooting
11.2.1 List of Servo Drive Alarms
11-8
A.C50
Phase C Not Detected
Phase C was not detected during the first two rotations after
the power supply was turned ON.
Gr.1
N/A
Magnetic Pole Incorrect
Detection
The magnetic pole could not be detected.
A.C51
Overtravel Detection at
Polarity Detection
An overtravel signal was detected during magnetic pole
detection.
Gr.1
Available
A.C52
Polarity Detection
Uncompleted
An attempt was made to detect the magnetic pole for the
high-speed winding or when changing the winding (for
motors with a winding selection).
Gr.1
Available
A.C53
Out of Range for Polarity
Detection
Movement during magnetic pole detection reached or
exceeded the set value of Pn494.
Gr.1
N/A
A.C54
Polarity Detection Error 2
The magnetic pole could not be detected.
Gr.1
N/A
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
A.C90
Encoder Communications
Error
Communications between the SERVOPACK and the
encoder is not possible.
Gr.1
N/A
A.C91
Encoder Communications
Position Data Error
An encoder position data calculation error occurred.
Gr.1
N/A
A.C92
Encoder Communications
Timer Error
An error occurs in the communications timer between the
encoder and the SERVOPACK.
Gr.1
N/A
A.CA0
Encoder Parameter Error
Encoder parameters are faulty.
Gr.1
N/A
A.CB0
Encoder Echoback Error
Contents of communications with encoder is incorrect.
Gr.1
N/A
A.CC0
Multiturn Limit Disagreement
Different multiturn limits have been set in the encoder and
the SERVOPACK.
Gr.1
N/A
A.CF1
*2
Serial Converter Unit
Communications Error
(Reception error)
Reception from the serial converter unit.
Gr.1
N/A
A.CF2
*2
Serial Converter Unit
Communications Error
(Timer stop)
Timer for communications with the serial converter unit is
faulty.
Gr.1
N/A
A.D00
Position Error Pulse Overflow
Position error pulses exceeded parameter (Pn520).
Gr.1
Available
A.D01
Position Error Pulse Overflow
Alarm at Servo ON
Position error pulses accumulated too much.
Gr.1
Available
A.D02
Position Error Pulse Overflow
Alarm by Speed Limit at Servo
ON
After a position error pulse has been input, Pn529 limits the
speed if the SV_ON command is received. If Pn529 limits
the speed in such a state, this alarm occurs when the position
references are input and the number of position error pulses
exceeds the value set for parameter Pn520 (Excessive Posi-
tion Error Alarm Level).
Gr.2
Available
A.D10
Motor-load Position Error
Overflow
The position error between motor and load is excessive.
Gr.2
Available
A.E00
System Alarm 5
Internal program error 5 occurred in the SERVOPACK.
Gr.1
Available
A.E02
System Alarm 6
Internal program error 6 occurred in the SERVOPACK.
Gr.1
N/A
A.E03
System Alarm 7
Internal program error 7 occurred in the SERVOPACK.
Gr.1
N/A
A.E61
System Alarm 8
Internal program error 8 occurred in the SERVOPACK.
Gr.1
N/A
A.EB1
HWBB Function Signal Input
Timing Error
The HWBB function signal input timing is faulty.
Gr.1
N/A
A.EEA
Converter Local Bus WD Error
A power regeneration converter local bus WD alarm
occurred.
Gr.1
N/A
A.EEB
Converter Local Bus
Communications Error
A communications error occurred during the power regener-
ation converter local bus communications.
Gr.1
Available
A.EF0
Local Bus Connection Error
The local bus is not connected.
Gr.1
Available
∗
2.
The alarm that may occur when using external encoders.
(cont’d)
Alarm
Display
Alarm Name
Meaning
Motor Stop
Method
Alarm
Reset
