YASKAWA MECHATROLINK Sigma 2 Series User Manual page 199

9 Troubleshooting
Alarm Alarm Code Outputs
Display
ALO1 ALO2
A.81 OFF OFF
A.82
A.83
A.84
A.85
A.86
A.b1
A.b2
A.b6
A.bF
A.C1 ON OFF
A.C6
A.C7
A.C8
A.C9
A.CA
A.Cb
A.CC
A.d0 ON
Table 9.2 Alarm Displays and Outputs (cont'd)
ALM
Output
ALO3
OFF OFF
ON OFF
ON OFF OFF
Alarm Name
∗2
Encoder Backup Error
∗2
Encoder Checksum Error
Encoder Battery Error
∗2
Encoder Data Error
Encoder Overspeed
Encoder Overheated
Reference Speed Input Read
Error
Reference Torque Input
Read Error
Gate array error
∗2
System Alarm
Servo Overrun Detected
Fully Closed Encoder Phase
A/B Disconnection Alarm
Fully Closed phase C Dis-
connection Alarm
Encoder Clear Error and
Multiturn Limit Setting
∗2
Error
Encoder Communications
∗2
Error
∗2
Encoder Parameter Error
∗2
Encoder Echoback Error
Multiturn Limit Disagree-
ment Alarm
Position Error Pulse Over-
flow
9-24
Description
All the power supplies for the absolute encoder
have failed and position data was cleared.
The checksum results of encoder memory is
incorrect.
Backup battery voltage for the absolute encoder
has dropped.
Data in the encoder is incorrect.
The encoder was rotating at high speed when
the power was turned ON.
The internal temperature of encoder is too high.
The A/D converter for reference speed input is
faulty.
The A/D converter for reference torque input is
faulty.
Communications LSI error
A system error occurred in the SERVOPACK.
The servomotor ran out of control.
The phase A/B of the fully closed encoder was
disconnected.
The phase C of the fully closed encoder was
disconnected.
The multiturn for the absolute encoder was not
properly cleared or set.
Communications between SERVOPACK and
encoder is not possible.
Encoder parameters are faulty.
Contents of communications with encoder is
incorrect.
Different multiturn limits have been set in the
encoder and SERVOPACK.
Position error pulse exceeded parameter
(Pn505).