
Servo alarms (1/2)
Number Message Contents
480 n AXIS : ILLEGAL SAFETY MODE
(MNT)
The monitor detected that safety signal mode D (state in which the
guard is open although no guard open request is input) was set, or the
guard is open when guard unlock signal (*LGD) is not output. In the
former, the alarm is issued for all axes. In the latter, the alarm is issued
only for the first servo axis (axis for which parameter No.1023 is set to 1
or, for tool post 2 under two-CPU two-path control or two-CPU
three-path control, an axis for which parameter No.1023 is set to 9).
Check if the guard state signal(SGD) is correctly connected. If an alarm
is issued in safety mode C (state in which a guard open request is input
and the guard is open), guard unlocking is disabled. Accordingly, this
alarm may be issued.
481 n AXIS : SAFETY PARAM ERROR
(MNT)
The monitor detected that a safety parameter error occurred with axis n
(axis 1 to axis 8). Set the safety parameters again.
Relative parameters are as follows.
No.1023,No.1829,No.1838,No.1942,No.1943,No.1944,No.1945,
No.1947, No.1948,No.1950
482 n AXIS : AXIS NUMBER NOT SET
(MNT)
The monitor 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.
483 MONITOR SAFETY FUNCTION
ERROR
An error occurred in safety functions of monitor :
1. Monitor or CNC detected the inexecution of monitor safety
functions.
2. A mismatch between the monitor results of the safety functions
and the servo software or CNC results of them occurred.
3. An error occurred in a monitor CPU test.
Replace the axis control card.
484 n AXIS : SERVO SAFETY
FUNCTION ERR
An error occurred in safety functions of servo software :
1. Servo software or CNC detected the inexecution of servo software
safety functions.
2. A mismatch between the servo software results of the safety
functions and the monitor results of them occurred.
3. An error occurred in a servo RAM test.
4. An error occurred in a servo CPU test.
Replace the axis control card.
485 ILLEGAL SAFETY DO (MNT) The monitor detected a mismatch exceeding the set time (parameter
No.1945) between a safety output signal via the PMC and the same
signal via the FSSB. Check the safety output signals via the PMC and
via the FSSB are equal.
486 ILLEGAL SAFETY DI (CNC) The CNC detected a mismatch exceeding the set time (parameter No.
1945) between a safety input signal input via the PMC and the same
signal input via the FSSB. Check the safety input signals via the PMC
and via the FSSB are equal.
487 ILLEGAL SAFETY MODE (CNC) The CNC detected that safety signal mode D (state in which the guard
is open although no guard open request is input) was set, or the guard
is open when guard unlock signal (*LGD) is not output. Check if the
guard state signal(SGD) is correctly connected. If an alarm is issued in
safety mode C (state in which a guard open request is input and the
guard is open), guard unlocking is disabled. Accordingly, this alarm may
be issued.
488 SAFE TEST OVER TIME A MCC off Test was not completed within the set time (parameter No.
1946). Check the MCC contact.
489 SAFETY PARAM ERROR (CNC) The CNC detected a safety parameter error.
Set the safety parameters again.
Relative parameters are as follows.
No.1023,No.1829,No.1838,No.1904,No.1942,No.1943,No.1944,
No.1945,No.1946,No.1947,No.1948,No.1950,No.4372
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