
B-63494EN/02 8.MAINTENANCE
- 143 -
No. Meaning Description Servo axis
operation when
alarm is issued
474 n AXIS:EXCESS ERROR
(STOP:MNT)
The monitor detected that the positional deviation during
a stop on axis n (axis 1 to axis 8) exceeded the setting
(parameter No. 1829) in safety signal mode C (state in
which a guard open request is input, and the guard is
open).
Confirm a proper value is set to parameter No. 1829.
Immediate stop
475 n AXIS:EXCESS ERROR
(MOVE:MNT)
The monitor detected that the positional deviation during
movement on axis n (axis 1 to axis 8) exceeded the
setting (parameter No. 1838) in safety signal mode C
(state in which a guard open request is input, and the
guard is open).
Confirm a proper value is set to parameter No. 1838.
Immediate stop
476 n AXIS:SAFETY SPEED
EXCEEDED (MNT)
The monitor detected that the specified speed on axis n
(axis 1 to axis 8) exceeded the safety speed (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
477 n AXIS:ILLEGAL MACHINE
POS.(MNT)
The monitor 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
478 n AXIS:ILLEGAL AXIS DATA
(MNT)
The monitor 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
479 ILLEGAL SAFETY DI (MNT) The monitor detected a mismatch exceeding the set time
(parameter No. 1945) between a safety input signal via
the PMC and the same signal via the FSSB.
Check the safety input signals via the PMC and via the
FSSB are equal.
Immediate stop