
APPENDIX
B--63005EN/02
A. ALARM LIST
721
No. DescriptionFaulty location and remedy
SPM
indica-
tion(*1)
Message
7n26 SPN_n_ : DISCONNECT
C--VELO DE-
TECT
26 1 Replace the cable.
2 Re--adjust the pre--amplifier.
The signal amplitude of the detection
signal (connectorJY2) on the Cs con-
tour control motor side is abnormal.
(Unconnected cable, adjustment er-
ror , etc.)
7n27 SPN_n_ : DISCONNECT
POS--CODER
27 1 Replace the cable.
2 Re--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 ab-
normal.
(Unconnected cable, adjustment
error, etc.)
7n28 SPN_n_ : DISCONNECT
C--POS DE-
TECT
28 1 Replace the cable
2 Re--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 indication:
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 status.
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 c om-
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 circuit
component is detected. (The LSI de-
vice for serial transfer is abnormal.)
7n33 SPN_n_ : SHORTAGE
POWER
CHARGE
33 1 Check and correct the power sup-
ply voltage.
2 Replace the PSM unit.
Charging of direct current power sup-
ply voltage in the power circuit sec-
tion is insufficient when the magnetic
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 according
to the manual.
If the parameter number is unknown,
connect the spindle check board,and
check the indicated parameter.
Parameter data exceeding the allow-
able limit is set.
7n35 SPN_n_ : EX SETTING
GEAR RATIO
35 Correctthe value according to the pa-
rameter manual.
Gear ratio data exceeding the allow-
able limit is set.