
APPENDIX
B–63524EN/01
G. ALARM LIST
869
Alarm List (Serial Spindle)
When a serial spindle alarm occurs, the following number is displayed on
the CNC. n is a number corresponding to the spindle on which an alarm
occurs. (n = 1: First spindle; n = 2: Second spindle; etc.)
NOTE*1
Note that the meanings of the SPM indications differ
depending on which LED, the red or yellow LED, is on.
When the red LED is on, the SPM indicates a 2–digit alarm
number. When the yellow LED is on, the SPM indicates an
error number that designates a sequence problem (for
example, when a rotation command is entered with the
emergency stop state not released).
³ See Appendix A.4, “Error Codes (Serial Spindle).”
Alarm Numbers and Alarms Displayed on the α Series Spindle Amplifier
No. Message
SPM in-
dica-
tion(*1)
Faulty location and remedy Description
(750) SPINDLE SERIAL LINK
ERROR
A0
A
1 Replace the ROM on the SPM
control printed circuit board.
2 Replace the SPM control printed
circuit board.
The program does not start normally.
ROM series error or hardware ab-
normality on the SPM control printed
circuit board
(749) S–SPINDLE LSI ERROR A1 Replace the SPM control printed cir-
cuit board.
An abnormality was detected in the
CPU peripheral circuit of the SPM
control circuit.
7n01 SPN_n_ : MOTOR OVER-
HEAT
01 1 Check and correct the peripheral
temperature and load status.
2 If the cooling fan stops, replace it.
The thermostat embedded in the mo-
tor winding operated.
The internal temperature of the motor
exceeds the specified level.
The motor is used in excess of the
continuous rating, or the cooling com-
ponent is abnormal.
7n02 SPN_n_ : EX SPEED ER-
ROR
02 1 Check and correct the cutting
conditions to decrease the load.
2 Correct parameter No. 4082.
The motor speed cannot follow a spe-
cified speed.
An excessive motor load torque is de-
tected.
The acceleration/deceleration time in
parameter No. 4082 is insufficient.
7n03 SPN_n_ : FUSE ON DC
LINK BLOWN
03 1 Replace the SPM unit.
2 Check the motor insulation status.
3 Replace the interface cable.
The PSM becomes ready (00 is indi-
cated), but the DC link voltage is too
low in the SPM.
The fuse in the DC link section in the
SPM is blown. (The power device is
damaged or the motor is ground–
fault.)
The JX1A/JX1B connection cable is
abnormal.
7n06 SPN_n_ : THERMAL
SENSOR DIS-
CONNECT
06 1 Check and correct the parameter.
2 Replace the feedback cable.
The temperature sensor of the motor
is disconnected.