
8.MAINTENANCE B-63494EN/02
- 146 -
No. Meaning Description Servo axis
operation when
alarm is issued
494 n AXIS:SAFTY SPEED
EXCEEDED (CNC)
The CNC detected that the specified speed on axis n
(axis 1 to axis 8) exceeded the setting (parameter No.
1942 / No. 13821 to No. 13824) in safety signal mode C
(state in which a guard open request is input, and the
guard is open).
When the guard is open, confirm a proper value is set to
parameter No. 1942, and the operation is done within the
safety speed.
If an alarm is issued in safety signal mode C, the
movement of the machine immediately stops, and a pulse
for adjusting the coordinates is generated. Accordingly,
this alarm can be issued.
Immediate stop
495 n AXIS:ILLEGAL MACHINE
POS.(CNC)
The CNC detected that the machine position on axis n
(axis 1 to axis 8) is not in the safety area (parameter No.
1943 and No. 1944 / No. 13831 to No. 13838) in safety
signal mode C (state in which a guard open request is
input, and the guard is open).
When the guard is open, confirm proper values is set to
parameter No. 1943 and No. 1944, and operation is done
in the safety area.
A machine position check is carried out just on an axis on
which the reference position has already been
established. No machine position check is made on an
axis on which the reference position has not yet been
established.
Immediate stop
496 n AXIS:ILLEGAL AXIS DATA
(CNC)
The CNC detected that an error occurred on axis n (axis 1
to axis 8) during axis data transfer.
If the alarm occurs after performing axis number setting
for the servo amplifier, set parameter No.2212#4 to 1, and
reset the bit to 0, and then turn off the power of the entire
system.
In the other case, replace the servo amplifier the alarm
occurred.
Immediate stop
497 n AXIS:SAFETY PARAM
TRANS ERROR
A safety parameter transfer error occurred on axis n (axis
1 to axis 8).
Replace the CPU card or the axis control card.
Immediate stop
498 n AXIS:AXIS NUMBER NOT
SET (CNC)
The CNC detected that the axis number of axis n (axis 1
to axis 8) is not set with the servo amplifier.
Turn off the power of the entire system. Then an axis
number is automatically set.
Immediate stop