FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

APPENDIX
G. ALARM LIST
B–62754EN/01
770
8) Rigid tapping alarm
Number Message Contents
740 RIGID TAP ALARM : EXCESS
ERROR
During rigid tapping, the position deviation of the spindle in the stop
state exceeded the setting.
741 RIGID TAP ALARM : EXCESS
ERROR
During rigid tapping, the position deviation of the spindle in the stop
state exceeded the setting.
742 RIGID TAP ALARM : LSI OVER
FLOW
During rigid tapping, an LSI overflow occurred on the spindle side.
9) Serial spindle alarms
Number Message Contents
749 S–SPINDLE LSI ERROR A communication error occurred for the serial spindle. The cause
may be the disconnection of an optical cable or the interruption of the
power to the spindle amplifier.
(Note) Unlike alarm No. 750, this alarm occurs when a serial commu-
nication alarm is detected after the spindle amplifier is normally acti-
vated.
750 SPINDLE SERIAL LINK ERROR This alarm is generated when the spindle control unit is not ready for
starting correctly when the power is turned on in the system with the
serial spindle.
The four reasons can be considered as follows:
1) An improperly connected optic cable, or the spindle control unit’s
power is OFF.
2) When the NC power was turned on under alarm conditions other
than SU–01 or AL–24 which are shown on the LED display of the
spindle control unit.
In this case, turn the spindle amplifier power off once and perform
startup again.
3) Other reasons (improper combination of hardware)
This alarm does not occur after the system including the spindle
control unit is activated.
4) The second spindle (when SP2, bit 4 of parameter No. 3701, is 1)
is in one of the above conditions 1) to 3).
See diagnostic display No. 409 for details.
751 SPINDLE–1 ALARM DETECT
(AL–XX)
This alarm indicates in the NC that an alarm is generated in the
spindle unit of the system with the serial spindle. The alarm is dis-
played in form AL–XX (XX is a number). Refer to (11) Alarms dis-
played on spindle servo unit .The alarm number XX is the number
indicated on the spindle amplifier. The CNC holds this number and
displays on the screen.
752 SPINDLE–1 MODE CHANGE
ERROR
This alarm is generated if the system does not properly terminate a
mode change. The modes include the Cs contouring, spindle posi-
tioning, rigid tapping, and spindle control modes. The alarm is acti-
vated if the spindle control unit does not respond correctly to the
mode change command issued by the NC.
754 SPINDLE–1 ABNORMAL TORQUE
ALM
An abnormal load on the first spindle motor was detected.
761 SPINDLE–2 ALARM DETECT
(AL–XX)
Refer to spindle alarm No. 751. (For 2nd axis)
762 SPINDLE–2 MODE CHANGE
ERROR
Refer to spindle alarm No. 752.(For 2nd axis)
764 SPINDLE–2 ABNORMAL TORQUE
ALM
Same as for alarm No. 754 (for the second spindle)
771 SPINDLE–3 ALARM DETECT
(AL–XX)
Same as for alarm No. 751 (for the third spindle)

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