Yaskawa FSP Amplifier User Manual
Page 305
FSP Amplifier User’s Manual
Chapter 9: Inspection, Maintenance, and Troubleshooting
9-40
Alarm Code Output
Alarm
Display ALO1 ALO2 ALO3
ALM
Output
Alarm Name
Description
A.81*
Absolute Encoder
Backup Error*
All the power supplies for the
absolute 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*
OFF OFF OFF OFF
System Alarm*
A system error occurred in the
servo amplifier.
A.C1
Servo Overrun
Detected
The servomotor ran out of
control.
A.C2 Phase
Finding
Error
The commutation (phase
finding) procedure for motor
with A quad B encoder was
faulty.
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*
ON OFF ON OFF
Encoder
Communications Error*
Communications between servo
amplifier and encoder is not
possible.
A.CA*
Encoder Parameter
Error*
Encoder parameters are faulty.
A.Cb*
Encoder Echo back
Error*
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.F1 OFF ON OFF OFF
Power Line Open
Phase
One phase is not connected in
the main power supply
A.--
OFF
OFF
OFF
ON
Not an error
Normal operation status
*
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.
** This alarm display appears only within the range of 30 W to 1 kW.
Note:
OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.