
APPENDIX
B–63864EN/03
G. ALARM LIST
799
No. DescriptionFaulty location and remedy
SPM
indica-
tion(*1)
Message
7n26 SPN_n_ : DISCONNECT
C–VELO DE-
TECT
26 1 Replace the cable.
2Re–adjust the pre–amplifier.
The signal amplitude of the detec-
tion signal (connector JY2) on the
Cs contour control motor side is ab-
normal.
(Unconnected cable, adjustment er-
ror, etc.)
7n27 SPN_n_ : DISCONNECT
POS–CODER
27 1 Replace the cable.
2Re–adjust the BZ sensor signal.
1 The spindle position coder (con-
nector JY4) signal is abnormal.
2 The signal amplitude (connector
JY2) of the MZ or BZ sensor is
abnormal.
(Unconnected cable, adjustment
error, etc.)
7n28 SPN_n_ : DISCONNECT
C–POS DE-
TECT
28 1 Replace the cable
2Re–adjust the pre–amplifier.
The position detection signal (con-
nector JY5) for Cs contour control is
abnormal.
(Unconnected cable, adjustment er-
ror, etc.)
7n29 SPN_n_ : SHORTTIME
OVERLOAD
29 Check and correct the load status. Excessive load has been applied
continuously for a certain period of
time. (This alarm is issued also
when the motor shaft has been
locked in the excitation state.)
7n30 SPN_n_ : OVERCUR-
RENT POW
CIRCUIT
30 Check and correct the power supply
voltage.
Overcurrent is detected in PSM
main circuit input. (PSM alarm in-
dication: 1)
Unbalanced power supply.
PSM selection error (The maximum
PSM output specification is exceed-
ed.)
7n31 SPN_n_ : MOTOR LOCK
OR V–SIG LOS
31 1 Check and correct the load sta-
tus.
2 Replace the motor sensor cable
(JY2 or JY5).
The motor cannot rotate at a speci-
fied speed. (A level not exceeding
the SST level for the rotation com-
mand has existed continuously.)
Abnormality in the speed detection
signal.
7n32 SPN_n_ : RAM FAULT
SERIAL LSI
32 Replace the SPM control printed cir-
cuit board.
Abnormality in an SPM control cir-
cuit component is detected. (The
LSI device for serial transfer is ab-
normal.)
7n33 SPN_n_ : SHORTAGE
POWER
CHARGE
33 1 Check and correct the power
supply voltage.
2 Replace the PSM unit.
Charging of direct current power
supply voltage in the power circuit
section is insufficient when the mag-
netic contractor in the amplifier is
turned on (such as open phase and
defective charging resistor).
7n34 SPN_n_ : PARAMETER
SETTING ER-
ROR
34 Correct a parameter value accord-
ing to the manual.
If the parameter number is un-
known, connect the spindle check
board, and check the indicated pa-
rameter.
Parameter data exceeding the al-
lowable limit is set.
7n35 SPN_n_ : EX SETTING
GEAR RATIO
35 Correct the value according to the
parameter manual.
Gear ratio data exceeding the allow-
able limit is set.