
APPENDIX
B–63844EN/02
G. ALARM LIST
839
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, “Error Codes (Serial Spindle).”
Alarm Numbers and Alarms Displayed on the α Series Spindle Amplifier
No. Message
SPM
indica-
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 normal-
ly.
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
OVERHEAT
01 1 Check and correct the peripheral
temperature and load status.
2 If the cooling fan stops, replace
it.
The thermostat embedded in the
motor winding operated.
The internal temperature of the mo-
tor exceeds the specified level.
The motor is used in excess of the
continuous rating, or the cooling
component 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
specified speed.
An excessive motor load torque is
detected.
The acceleration/deceleration time
in parameter No. 4082 is insuffi-
cient.
7n03 SPN_n_ : FUSE ON DC
LINK BLOWN
03 1 Replace the SPM unit.
2 Check the motor insulation sta-
tus.
3 Replace the interface cable.
The PSM becomes ready (00 is in-
dicated), 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 de-
vice is damaged or the motor is
ground–fault.)
The JX1A/JX1B connection cable is
abnormal.
7n04 SPN_n_ : INPUT FUSE/
POWER
FAULT
04 Check the state of the input power
supply to the PSM.
The PSM found a missing power
supply phase. (PSM alarm 5)
7n06 SPN_n_ : THERMAL
SENSOR DIS-
CONNECT
06 1 Check and correct the parame-
ter.
2 Replace the feedback cable.
The temperature sensor of the mo-
tor is disconnected.