
B–64115EN/01
6. DIGITAL SERVO
397
A timing chart for handling a warning is shown below.
Servo amplifier
SVWRN1–4
(Warning)
Occurrence of a warning
Activation
Perform deceleration stop or block stop
during this time period with the PMC to
stop the machine without damage. The
time period varies with the warning type.
Occurrence and stop of the
alarm corresponding to a
warning
#7
SVWRN4F093
#6
SVWRN3
#5
SVWRN2
#4
SVWRN1
#3 #2 #1 #0
If SWP parameter (bit 2 of parameter No. 1807) = 0, a servo alarm, in
addition to a warning signal, is issued when the αi servo amplifier gets
in the warning state.
The servo alarms listed below place automatic operation on feed hold,
thus decelerating all controlled axes (including the PMC axis) until they
stop.
These alarms will not de–energize the servo motors.
Alarm No. with the servo
amplifier in the warning state
Alarm No. with the servo
amplifier in the alarm state
Alarm message
608 444
n axis : The inverter’s internal cooling fan stopped.
609 601
n axis : The inverter radiator cooling fan stopped.
610 443
n axis : The converter cooling fan stopped.
611 606
n axis : The converter radiator cooling fan stopped.
612 431
n axis : The converter main circuit was overloaded.
613 607 n axis : The converter main power supply encountered
n axis : an open–phase condition.
If the αi servo amplifier actually gets in the alarm state after any of the
above servo alarms with the servo amplifier in the warning state has
occurred, the servo motors are de–energized, resulting in an alarm with
the servo amplifier in the alarm state being displayed.
If SWP (bit 2 of parameter No. 1807) = 1, a warning signal, rather than
an alarm with the servo amplifier in the warning state, is issued when the
αi servo amplifier gets in the warning state. If the servo amplifier gets in
the warning state during automatic operation, the automatic operation
continues. In this case, decelerate each axis until they stop, using the
warning state signal before the servo motors are de–energized.
Otherwise, the motors may get de–energized in the middle of axis
movement.
Signal address
Alarms with the αi servo
amplifier in the warning
state