TROUBLE SHOOTING
10 CHAPTER 3
A.81 All the power supplies for the absolute
encoder have failed and position data was
cleared *
²
The following power supplies to the
absolute encoder both failed:
• +5V supply
• Battery power
Follow absolute encoder setup procedure
Absolute encoder malfunctioned Replace servomotor
Circuit board (1PWB) defective Replace servopack
A.82 The checksum results of encoder
memory is abnormal *
²
Error during encoder memory check • Follow absolute encoder setup
procedure
• Replace servomotor if error
occurs frequently
Circuit board (1PWB) defective Replace servopack
A.83 Battery voltage for the absolute encoder
has dropped
• Disconnected battery
• Defective battery connection
Check and correct battery connection
Battery voltage below specified value.
Specified value: 2.7V
Install a new battery while the control
power to the servopack is ON. After
replacement, cycle the power OFF and
ON again
Defective circuit board (1PWB) Replace servopack
A.84
Received absolute data is abnormal *²
Malfunctioning absolute encoder Replace servomotor if error occurs
frequently
Operational error in encoder caused by
external noise
Check and correct wiring around the
encoder, (grounding of servomotor,
separation of encoder and power cables,
insertion of toroidal cores onto cables to
reduce noise, etc.)
A.85 The encoder was rotating at high speed
when the power was turned ON
Absolute encoder turned ON at motor
speed exceeding 200rpm
Turn ON power supply with the
servomotor stopped
Circuit board (1PWB) defective Replace servopack
A.86 The internal temperature of encoder is
too high
The ambient temperature of the
servomotor is high
Alter conditions so that the ambient
temperature goes below 40°C
Servomotor is operating under overload Reduce load
Circuit board (1PWB) defective Replace servopack
Encoder defective Replace servopack
A.b1
A.b2
The A/D converter for reference speed
input is faulty
The A/D converter for reference torque
input is faulty
Error in reference read-in unit (A/D
Converter, etc.)
Reset alarm and restart operation
Faulty reference read-in unit (A/D
Converter, etc.)
Replace servopack
Defective circuit board (1PWB) Replace servopack
A.bF A system error occurred in the
servopack *
²
Note: 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
A.C1 The servomotor ran out of control Incorrect or disconnected servomotor
wiring
Check wiring and connectors at the
servomotor
Incorrect or disconnected encoder wiring Check wiring and connectors at the
encoder
Defective encoder Replace servomotor
Defective circuit board (1PWB) Replace servopack
ALARM DESCRIPTION CAUSE REMEDY
To Next Page
Loading...
