
8
8.1 Alarms Displayed on NC Screen
498
8.1.6 Servo alarms (1/2)
No. Message Contents
401 SERVO ALARM: n–TH AXIS
VRDY OFF
The n–th axis (axis 1–8) servo amplifier
READY signal (DRDY) went off.
Refer to procedure of trouble shooting.
402 SERVO ALARM: SV CARD
NOT EXIST
The axis control card is not provided.
403 SERVO ALARM:
CARD/SOFT MISMATCH
The combination of the axis control card
and servo software is illegal.
The possible causes are as follows:
· A correct axis control card is not pro-
vided.
· Correct servo software is not installed
on flash memory.
404 SERVO ALARM: n–TH AXIS
VRDY ON
Even though the n–th axis (axis 1–8)
READY signal (MCON) went off, the servo
amplifier READY signal (DRDY) is still on.
Or, when the power was turned on, DRDY
went on even though MCON was off.
Check that the PSM and SVM or CNC and
SVM are connected.
405 SERVO ALARM: (ZERO
POINT RETURN FAULT)
Position control system fault. Due to an NC
or servo system fault in the reference posi-
tion return, there is the possibility that refer-
ence position return could not be executed
correctly. Try again from the manual refer-
ence position return.
407 SERVO ALARM: EXCESS
ERROR
The following error occurred during simple
synchronous control: The difference in ma-
chine coordinates between the synchro-
nized axes exceeds the value set in
PRM8314.
409 SERVO ALARM: n AXIS
TORQUE ALM
Abnormal servo motor load has been de-
tected. Alternatively, abnormal spindle
motor load has been detected in Cs mode.
410 SERVO ALARM: n–TH AXIS
– EXCESS ERROR
One of the following errors occurred:
1) The positional deviation value when
the n–th axis (axis 1–8) stops exceeds
the value set in PRM1829.
2) In simple synchronous control, the
compensation amount for synchro-
nization exceeds the value set in
PRM8325. (This alarm is issued only
for the slave axis.)
411 SERVO ALARM: n–TH AXIS
– EXCESS ERROR
The position deviation value when the n–th
axis (axis 1–8) moves is larger than the set
value in PRM1828. Refer to procedure of
trouble shooting.
413 SERVO ALARM: n–th AXIS
– LSI OVERFLOW
The contents of the error register for the
n–th axis (axis 1–8) exceeded "2
31
pow-
er. This error usually occurs as the result
of an improperly set parameters.
415 SERVO ALARM: n–TH AXIS
– EXCESS SHIFT
A speed higher than 524288000 units/s
was attempted to be set in the n–th axis
(axis 1–8). This error occurs as the result
of improperly set CMR.