
B-63494EN/02 8.MAINTENANCE
- 147 -
8.2.3 Serial Spindle Alarms
No. Meaning Description Servo axis
operation when
alarm is issued
749 S-SPINDLE LSI
ERROR
It is serial communication error while system is executing after power
supply on.
Check optical cable connection between main CPU board and
spindle amplifier printed board.
Replace optical cable, main CPU board, option 2 board or spindle
amplifier printed board.
If this alarm occurs when CNC power supply is turned on or when
this alarm can not be cleared even if CNC is reset, turn off the power
supply also turn off the power supply in spindle side.
Immediate stop
755 SPINDLE-1 SAFETY
FUNCTION ERROR
An error occurred in any spindle safety functions on the first spindle.
1 CNC detected that some spindle safety functions were not
executed.
2 A safety parameter transfer error occurred.
Replace the CPU card or spindle amplifier module.
Immediate stop
756 SPINDLE-1 ILLEGAL
AXIS DATA
For the first spindle, the CNC detected a mismatch between the
spindle amplifier connection state and spindle amplifier hardware
setting.
Check the spindle amplifier connection state and spindle amplifier
hardware setting.
Replace the CPU card or spindle amplifier module.
If this alarm is issued because the spindle amplifier configuration is
changed, correct the setting on the spindle amplifier side.
Immediate stop
757 SPINDLE-1 SAFETY
SPEED OVER
For the first spindle, the CNC detected that the speed of the spindle
motor exceeded the safety speed (parameter No.
4372/4438/4440/4442) in safety signal mode C (state in which a
guard open request is input, and the guard is open).
Alternatively, for the first spindle, the CNC detected a mismatch
between the CNC and spindle software, as to which of the speed of
the spindle motor and the safety speed (parameter No.
4372/4438/4440/4442) is greater.
When the guard is open, perform operation at a speed not
exceeding the safety speed.
Check the safety speed parameter(parameter
No.4372/4438/4440/4442).
Replace the CPU card or spindle amplifier module.
Immediate stop
765 SPINDLE-2 SAFETY
FUNCTION ERROR
Same as alarm No. 755. (For the second spindle) Immediate stop
766 SPINDLE-2 ILLEGAL
AXIS DATA
Same as alarm No. 756. (For the second spindle) Immediate stop
767 SPINDLE-2 SAFETY
SPEED OVER
Same as alarm No. 757. (For the second spindle) Immediate stop
775 SPINDLE-3 SAFETY
FUNCTION ERROR
Same as alarm No. 755. (For the second spindle) Immediate stop
776 SPINDLE-3 ILLEGAL
AXIS DATA
Same as alarm No. 756. (For the second spindle) Immediate stop
777 SPINDLE-3 SAFETY
SPEED OVER
Same as alarm No. 757. (For the second spindle) Immediate stop
785 SPINDLE-4 SAFETY
FUNCTION ERROR
Same as alarm No. 755. (For the second spindle) Immediate stop