FANUC Series 16/18/160/180-Model C for Lathe Operator Manual

APPENDIX
B–62754EN/01
G. ALARM LIST
767
5) Servo alarms
Number Message Contents
400 SERVO ALARM: n AXIS
OVERLOAD
The n–th axis (axis 1–8) overload signal is on. Refer to diagnosis
display No. 201 for details.
401 SERVO ALARM: n AXIS VRDY OFF The n–th axis (axis 1–8) servo amplifier READY signal (DRDY) went
off.
404 SERVO ALARM: n 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 servo interface module and servo amp are connected.
405 SERVO ALARM: (WRONG ZRN) Position control system fault. Due to an NC or servo system fault in
the reference position return, there is the possibility that reference
position return could not be executed correctly. Try again from the
manual reference position return.
407 SERVO ALARM: EXCESS ERR The difference in synchronous axis position deviation exceeded the
set value.
409 SERVO ALARM:EXCESS ERROR An abnormal load on the servo motor was detected. Alternatively, an
abnormal load on the spindle motor was detected in Cs mode.
410 SERVO ALARM: n AXIS EXCESS
ERR
The position deviation value when the n–th axis (axis 1–8) stops is
larger than the set value.
Note) Limit value must be set to parameter No.1829 for each axis.
411 SERVO ALARM: n AXIS EXCESS
ERR
The position deviation value when the n–th axis (axis 1–8) moves is
larger than the set value.
Note) Limit value must be set to parameter No.1828 for each axis.
413 SERVO ALARM: n AXIS LSI OVER The contents of the error register for the n–th axis (axis 1–8) are be-
yond of the range of –2
31
to 2
31
. This error usually occurs as the
result of an improperly set parameters.
414 SERVO ALARM: n AXIS DETECT
ERR
N–th axis (axis 1–8) digital servo system fault. Refer to diagnosis
display No. 200 and No.204 for details.
415 SERVO ALARM: n AXIS MOTION
OVER
A speed higher than 511875 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.
416 SERVO ALARM: n AXIS
DISCONNECT
Position detection system fault in the n–th axis (axis 1–8) pulse coder
(disconnection alarm). Refer to diagnosis display No. 201 for details.
417 SERVO ALARM: n AXIS DGTL
PARAM
This alarm occurs when the n–th axis (axis 1–8) is in one of the
conditions listed below. (Digital servo system alarm)
1) The value set in Parameter No. 2020 (motor form) is out of the
specified limit.
2) A proper value (111 or –111) is not set in parameter No.2022
(motor revolution direction).
3) Illegal data (a value below 0, etc.) was set in parameter No. 2023
(number of speed feedback pulses per motor revolution).
4) Illegal data (a value below 0, etc.) was set in parameter No. 2024
(number of position feedback pulses per motor revolution).
5) Parameters No. 2084 and No. 2085 (flexible field gear rate) have
not been set.
6) A value outside the limit of {1 to the number of control axes} or
a non–continuous value (Parameter 1023 (servo axis number)
contains a value out of the range from 1 to the number of axes,or
an isolated value (for example, 4 not prceded by 3).was set in
parameter No. 1023 (servo axisnumber).
421 SERVO ALARN : n AXIS EXCESS
ER (D)
While the dual position feedback function is being applied, an exces-
sive difference was detected between a semi–closed loop error and
closed loop error. Check the dual position conversion factor set in
parameter Nos. 2078 and 2079.

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