FANUC SERVO AMPLIFIER βi series I/O Link Option
Modification from I/O Link β
EDIT
DRAW. NO. CUST
TITLE
DESCRIPTION
DESIG.
DATE
A-79487E
14
23
01
04.03.15
SHEET
Newly designed
No. LED display
Description
Countermeasure
410
The servo position error in the
stop state is larger than the value
specified in parameter No.110.
Determine the mechanical cause of
the large position error.
If no mechanical cause is found,
specify a larger value for the
parameter.
411
The servo position error during
movement is larger than the value
specified in parameter No.182.
Determine the mechanical cause of
the large position error.
If no mechanical cause is found,
apply any of the following
countermeasures:
•
Specify a larger value for the
parameter.
•
Specify a lower feed rate.
•
Increase the time constants.
Over Current Alarm has been
issued.
This alarm is issued when an
excessively large current flows in
the main circuit.
412
(1)
Check whether the motor ID number is correctly set in parameter
No.125.
(2)
Check whether the standard values (see Appendix B) are
specified in the current control parameters for servo control.
Correct current control is possible only when the standard values
are specified for the following parameters:
No.70, 71, 72, 78, 79, 84, 85, 86, 87, 88, 89, 90, 99, 118, 119
(3)
Disconnect the power line from the servo amplifier unit connector.
Then, release the emergency stop state.
- If the over-current alarm continues to be issued, replace the
servo amplifier unit.
- If no over-current alarm is issued, go to (4).
(4)
Check the insulation between the ground and each of U, V, and
W. If the insulation is satisfactory, go to (5).
If a short-circuit is detected, disconnect the power line from the
motor connector. Then, check the insulation between the ground
and each of U, V, and W of the motor.
If a short-circuit is found between the ground and U, V, or W
of the motor, replace the motor.
If the insulation is satisfactory, replace the power line.
(5)
Connect the power line. Observe the waveform of the motor
current (IR, IS) while the motor is accelerating or decelerating.
See the description of the checking of the motor current in
Appendix E, "Servo Check Board". If the motor current (IR, IS)
does not exhibit a normal sine wave, replace the servo amplifier
unit.
(6)
Check if the motor current (IR, IS) waveforms include noise.
When noise is included, take an action such as making a
connection to shield ground.
When noise is not included, replace the servo amplifier unit.
(7)
If (1) to (6) above are not the cause of the alarm, the pulse
coder, command cable or internal hardware of the CNC may be
defective.