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