YASKAWA S Series User Manual page 277

Maintenance and Inspection
12.2.2 SERVOPACKS
Alarm Code
(Alarm/warning History)
At the SENS_ON command
"81"
transfer
Absolute encoder backup
error (only if a 12—bit
absolute encoder is used)
"82" During Servomotor driving or
the SENS_ON command
Absolute encoder
transferring
checksum error (only if a
12-bit absolute encoder is
used)
"83,,
At control power supply ON or
the SENS_ON command trans-
Absolute encoder battery
fer (only i f a 12—bit encoder is
error (only if an absolute used)
encoder is used)
"84" At the SENS_ON command
transfer
Absolute encoder data
error (only if a 12—bit
absolute encoder is used)
"85" At the SENS_ON command
transfer
Absolute encoder
overspeed (only if a 12—bit
absolute encoder is used)
Lit soon after Servomotor
"C1"
started to run
Servo overrun
"C2" Lit in 1 to 3 seconds after pow-
er ON.
Phase error detection
Lit during driving
Lit soon after Servomotor
"C3"
started to run
Encoder Phase PA, PB
Broken wire
"C4" Lit soon after Servomotor
started to run
Encoder Phase PC
Broken wire
Status When Lit
The following power supplied to the
absolute encoder all failed:
• +5 V power supply
• Battery
• 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
Cause
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 corn-
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.
Remedy