YASKAWA SGM Series User Manual page 270

Maintenance and Inspection
12.2.2 SERVOPACKS
Alarm Code
(Alarm/warning History)
"81"
Absolute encoder backup
error (only if a 12−bit
absolute encoder is used)
"82"
Absolute encoder
checksum error (only if a checksum error (only if a
12-bit absolute encoder is
used)
"83"
Absolute encoder battery
12
error (only if an absolute
encoder is used) encoder is used)
"84"
Absolute encoder data
error (only if a 12−bit error (only if a 12−bit
absolute encoder is used)
"85"
Absolute encoder
overspeed (only if a 12−bit overspeed (only if a 12−bit
absolute encoder is used)
"C1"
Servo overrun Servo overrun
"C2"
Phase error detection Phase error detection
"C3"
Encoder Phase PA, PB
Broken wire
"C4"
Encoder Phase PC
Broken wire
Status When Lit
At the SENS_ON command
transfer
During Servomotor driving or
the SENS_ON command
transferring
At control power supply ON or
the SENS_ON command trans-
fer (only if a 12−bit encoder is
used)
At the SENS_ON command
transfer
At the SENS_ON command
transfer
Lit soon after Servomotor
started to run
Lit in 1 to 3 seconds after pow-
er ON.
Lit during driving
Lit soon after Servomotor
started to run
Lit soon after Servomotor
started to run
Cause
The following power supplied to the
absolute encoder all failed:
S +5 V power supply
S Battery
S Internal capacitor
Control board (1PWB) defective.
Absolute encoder memory check er-
ror occurred.
Control board (1PWB) defective.
Battery not connected.
Battery connection defective.
Battery voltage is lower than about
3.3 V.
Control board (1PWB) defective
Absolute encoder malfunctioned.
Control board (1PWB) defective.
Absolute encoder turned ON at the
motor speed exceeding 400 r/min.
Control board (1PWB) defective.
Servomotor wiring incorrect or
disconnected.
Encoder wiring incorrect or
disconnected.
Faulty encoder wiring or connection. Check wiring and connectors at
Noise in encoder wiring.
Encoder defective.
Faulty encoder wiring or connection. Check wiring and connectors at
Noise in encoder wiring.
Encoder defective.
Faulty encoder wiring (PA, PB) or
connection.
Faulty encoder wiring (PC) or con-
nection.
12 -8
Remedy
Follow the absolute encoder
set−up procedure.
Replace SERVOPACK.
Follow the absolute encoder
set−up procedure.
Replace SERVOPACK.
Check and correct battery con-
nections.
Replace with a new battery.
Replace SERVOPACK.
Transfer the SENS_OFF com-
mand and resend the
SENS_ON command.
Replace SERVOPACK.
Transfer the SENS_ON com-
mand at a speed lower than 400
r/min.
Replace SERVOPACK.
Check wiring and connectors at
the Servomotor.
Check wiring and connectors at
the encoder.
the encoder.
Separate encoder wiring from
main wiring circuits.
Replace Servomotor.
the encoder.
Separate encoder wiring from
main wiring circuits.
Replace Servomotor.
Check wiring and connectors at
the encoder.
Check wiring and connectors at
the encoder.