E1 Series Servo Drive User Manual Troubleshooting And Maintenance
HIWIN MIKROSYSTEM CORP. 13-17
13.3.2 Causes and corrective actions for warnings
Table13.3.2.1 Causes and corrective actions for warnings
Warning Number
And Warning Name
Cause Confirmation Method Corrective Action
AL.900
Position deviation
overflow
The wiring of the U, V or W
phase of the motor is
Check the wiring of the
motor power cable.
Check if the connection of
the motor power cable or
The servo gain of the servo
drive is too low.
Check if the servo gain of the
servo drive is too low.
Obtain proper servo gain by
auto tuning.
The inputting frequency of
command pulse is too high.
Decrease the inputting
frequency of command
pulse. Then start operation
again.
frequency of command pulse
or command acceleration.
Or adjust the electronic gear
is too high.
acceleration. Then start
acceleration/deceleration
The setting value of alarm
value for overflow position
deviation (Pt520 or Pt521) is
low when compared to the
Check if the setting value of
alarm value for overflow
position deviation (Pt520 or
Pt521) is appropriate.
Adjust the setting value of
alarm value for overflow
position deviation (Pt520 or
Pt521).
Servo drive malfunction N/A
Power on again. If the alarm
occurs again, it could be
servo drive malfunction,
please replace the servo
AL.910
Overload
encoder is poor or the
Check the wiring.
Check if the wirings of the
motor and encoder are
the detection value of
Check the detection value of
overload and motion
Re-calculate and adjust the
load and operating condition.
Overload occurs since the
motor cannot be operated
due to mechanical factor.
Check the motion command
and motor velocity.
Improve mechanical factor.
Servo drive malfunction N/A
malfunction, please replace
AL.923
Internal fan stop
The internal fan of the servo
drive stops operating.
Check if there is foreign
object inside the internal fan.
If the alarm occurs again
after the foreign object is
removed, it could be servo
drive malfunction, please
AL.930
Encoder battery
malfunction
The battery of absolute
encoder is abnormal.
Check if the battery voltage
is 5 V.
Change the battery or
encoder cable.
Encoder malfunction N/A
warning occurs again, it
could be motor malfunction,
please replace the motor.
Fieldbus
synchronous cycle
The synchronous cycle time
of Fieldbus communication
is unstable.
N/A
Increase Fieldbus
communication cycle time.
AL.944
System warning
internal program of the servo
N/A
Perform software reset or
power on the servo drive