Yaskawa MP940 - Manual (Page 401)

SERVOPACK Inspection, Maintenance, and Troubleshooting
10.2.3 Alarm Display Table
10-34
A.81 OFF OFF OFF OFF Encoder Backup Error *2 All the power supplies for the
absolute encoder have failed and
position data was cleared.
A.82
Encoder Checksum Error
*2 The checksum results of encoder
memory is abnormal.
A.83 Absolute Encoder Battery
Error Battery voltage for the absolute
encoder has dropped.
A.84
Encoder absolute alarm *1 Absolute data received has an
error.
A.85 Encoder Overspeed The encoder was rotating at high
speed when the power was turned
ON.
A.86 OFF OFF OFF OFF Encoder Overheated The internal temperature of
encoder is too high.
A.9F Option Warning Warning has occurred in the option
(MP940).
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 *2
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
*2
Communications between SER-
VOPACK and encoder is not pos-
sible.
A.CA
Encoder Parameter Error *2 Encoder parameters are faulty.
A.Cb
Encoder Echoback Error
*2 Contents of communications with
encoder is incorrect.
ACC Multi-turn Limit Disagree-
ment
*3
Different multi-turn limits have
been set in the encoder and SER-
VOPACK.
A.d0 ON ON OFF OFF Position Error Pulse Over-
flow Position error pulse exceeded
parameter (Pn505).
A.E0 OFF ON ON OFF No Option Unit No MP940 Option Unit is
mounted.
A.E1 Option Timeout No response from the option
board.
A.E2 Option WDC error MP940 Option WDC error.
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 Transmis-
sion Error Digital Operator (JUSP-OP02A-2)
fails to communicate with SER-
VOPACK.
CPF01
A.- - OFF OFF OFF ON Not an error Normal operation status
Alarm
Display
Alarm Code Outputs ALM
Output
Alarm Name Meaning
ALO1 ALO2 ALO3