Yaskawa Sigma II Series Servo System - Manual (Page 429)

Sigma II User’s Manual Chapter 9: Inspection, Maintenance, and Troubleshooting
9 - 41
*1
These alarms are not reset by the alarm reset signal (/ALM-RST). Eliminate the cause of
the alarm and then turn OFF the power supply to reset the alarms.
2) This alarm display appears only within the range of 30 to 1000W.
Notes: OFF: Output transistor is OFF.
ON:
Output transistor is ON.
Alarm
Display
Alarm Code Output
ALM
Output
Alarm Name Description
ALO1 ALO2 ALO3
A.81
OFF OFF OFF OFF
Absolute Encoder
Backup Error
*
All the power supplies for the abso-
lute encoder have failed and position
data was cleared.
A.82
Encoder Checksum
Error
*
The checksum results of encoder
memory is abnormal.
A.83
Absolute Encoder
Battery Error
Battery voltage for the absolute
encoder has dropped.
A.84
Absolute Encoder Data
Error
*
Received absolute data is abnormal.
A.85
Absolute Encoder
Overspeed
The encoder was rotating at high
speed when the power was turned
ON.
A.86 Encoder Overheated
The internal temperature of encoder
is too high.
A.b1
Reference Speed Input
Read Error
The A/D converter for reference
speed input is faulty.
A.b2
Reference Torque Input
Read Error
The A/D converter for reference
torque input is faulty.
A.bF System Alarm *
A system error occurred in the servo
amplifier.
A.C1
ON OFF ON OFF
Servo Overrun
Detected
The servomotor ran out of control.
A.C8
Absolute Encoder Clear
Error and
Multi-Turn Limit
Setting Error *
The multi-turn for the absolute
encoder was not properly cleared or
set.
A.C9
Encoder
Communications
Error
*1
Communications between servo
amplifier and encoder is not possible.
A.CA
Encoder Parameter
Error
*1
Encoder parameters are faulty.
A.Cb
Encoder Echoback
Error
*1
Contents of communications with
encoder is incorrect.
A.CC ON OFF ON OFF
Multi-Turn Limit
Disagreement
Different multi-turn limits have been
set in the encoder and servo
amplifier.
A.d0 ON ON OFF OFF
Position Error Pulse
Overflow
Position error pulse exceeded
parameter (Pn505).
A.E7 OFF ON ON OFF
Option Unit Detection
Error
Option unit detection fails.
A.F1 OFF ON OFF OFF
Power Line Open
Phase
One phase is not connected in the
main power supply
CPF00
Not Specified
Digital Operator
Transmission Error
Digital operator (JUSP-OP02A-2)
fails to communicate with servo
amplifier (e.g., CPU error). CPF01
A.-- OFF OFF OFF ON Not an error Normal operation status