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4.4
SERVO CONTROL UNIT ALARM AND CORRECTIVE ACTION
Servo-related alarms consist of those
having detecting
functions
on
the NC
unit side and those
having detecting
functions
on
the servopack side.
They
can both be confirmed with the alarm
screen,
servo
alarm screen and CRT
display.
:
(1)
Alarms detected
on
the NC unit side
:
Table 4.4.1 Alarms Detected
on
the NC Unit Side
Contents
Alarm
No.
Detected when the value determined
by machine followup
deviation exceeds the value determined
by the machine
maker.
'
# 304 1
-
# 3045
Overdeviation .
Detection
Detected when
excessively
deep
cuts
are
made,
when variable
speed frequency
is
excessive,
and
when friction of the mechanical
system
increases
abnormally.
It 3061
-
It
3065
Overload Detection
Detected when
there is an
open
circuit in the
signal
line
from PC.
PG
Open
Circuit
Detection
# 3081
-
# 3095
# 3121
'
# 3125
Overspeed
Detection
Delected when there is an overspeed command and
maximum
motor
speed is
exceeded.
Overtravel
Prevention
Detection
Overtravel
-operation
due
to
erroneous connection
of
the
motor or
PG
signal is
detected
in advance.
# 3141
—
i
3145
Detects malfunction of absolute encoder when
an absolute encoder is used.
It
3161
—
# 3165
-Absolute Error
Detection
Detects pulse
count
servopack of
the internal PC
when
using
an absolute encoder.
Position Error
Detection
t
3181
-
It 3185
Servopack
Communication
Error Detection
Detects malfunction in serial communications
between the NC and the
servopack
#
3201
—
# 3205
For
details, refer
to
the Maintenance Manual attached. ITOE-C 843
1
1.21
-
654
-
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