Sigma II User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9-38
Notes: 1.
OFF:Output transistor is OFF.
ON:Output transistor is ON.
2.
(*) These alarms are not reset for the alarm reset signal (/ALM-RST). Eliminate the cause of the
alarm and then turn OFF the power supply to reset the alarms.
3.
(
**
) This alarm display appears only within the range of 30 to 1000W.
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 Bat-
tery 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 Communica-
tions Error
*
Communications between servo
amplifier and encoder is not possible.
A.CA
Encoder Parameter
Error
*
Encoder parameters are faulty.
A.Cb
Encoder Echoback
Error
*
Contents of communications with
encoder is incorrect.
A.CC
ON
OFF
ON
OFF
Multi-Turn Limit Dis-
agreement
Different multi-turn limits have been
set in the encoder and servo ampli-
fier.
A.d0
ON
ON
OFF
OFF
Position Error Pulse
Overflow
Position error pulse exceeded param-
eter (Pn505).
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 Trans-
mission 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
Alarm
Display
Alarm Code Output
ALM
Output
Alarm Name
Description
ALO1
ALO2
ALO3