
APPENDIX
B–63504EN/01
G. ALARM LIST
671
#7
202
#6
CSA
#5
BLA
#4
PHA
#3
PCA
#2
BZA
#1
CKA
#0
SPH
#6 (CSA) : Check sum alarm has occurred.
#5 (BLA) : Battery low alarm has occurred.
#4 (PHA) : Phase data trouble alarm has occurred.
#3 (PCA) : Speed count trouble alarm has occurred.
#2 (BZA) : Battery zero alarm has occurred.
#1 (CKA) : Clock alarm has occurred.
#0 (SPH) : Soft phase data trouble alarm has occurred.
#7
DTE203
#6
CRC
#5
STB
#4
PRM
#3 #2 #1 #0
#7 (DTE) : Data error has occurred.
#6 (CRC) : CRC error has occurred.
#5 (STB) : Stop bit error has occurred.
#4 (PRM) : Parameter error alarm has occurred. In this case, a servo parameter error
alarm (No. 417) is also output.
5) Servo alarms
Number Message Contents
400 SERVO ALARM: n–TH AXIS
OVERLOAD
The n–th axis (axis 1–4) overload signal is on. Refer to diagnosis dis-
play No. 200, 201 for details.
401 SERVO ALARM: n–TH AXIS VRDY
OFF
The n–th axis (axis 1–4) servo amplifier READY signal (DRDY) went off.
404 SERVO ALARM: n–TH AXIS VRDY
ON
Even though the n–th axis (axis 1–4) 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: (ZERO POINT
RETURN FAULT)
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 refer-
ence position return.
407 SERVO ALARM: EXCESS ERROR The difference in synchronous axis position deviation exceeded the set
value.
409 TORQUEALM’ : 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–TH AXIS –
EXCESS ERROR
The position deviation value when the n–th axis (axis 1–4) stops is
larger than the set value.
Note) Limit value must be set to parameter No.1829 for each axis.
411 SERVO ALARM: n–TH AXIS –
EXCESS ERROR
The position deviation value when the n–th axis (axis 1–4) moves is
larger than the set value.
Note) Limit value must be set to parameter No.1828 for each axis.
413 SERVO ALARM: n–th AXIS – LSI
OVERFLOW
The contents of the error register for the n–th axis (axis 1–4) are beyond
the range of –2
31
to 2
31
. This error usually occurs as the result of an
improperly set parameters.
414 SERVO ALARM: n–TH AXIS –
DETECTION RELATED ERROR
N–th axis (axis 1–4) digital servo system fault. Refer to diagnosis dis-
play No. 200, 201, and No.204 for details.
415 SERVO ALARM: n–TH AXIS –
EXCESS SHIFT
A speed higher than 511875 units/s was attempted to be set in the n–th
axis (axis 1–4). This error occurs as the result of improperly set CMR.
416 SERVO ALARM: n–TH AXIS –
DISCONNECTION
Position detection system fault in the n–th axis (axis 1–4) pulse coder
(disconnection alarm). Refer to diagnosis display No. 200, 201 for
details.
D The details of serial
pulse coder alarm