
APPENDIXG. ALARM LIST
B–63004EN/02
838
1 : In the spindle serial control, the serial spindle parameters do not fulfill
the spindle unit startup conditions.
#2 (S2E) 0 : The second spindle is normal during the spindle serial control startup.
1 : The second spindle was detected to have a fault during the spindle
serial control startup.
#1 (S1E) 0 : The first spindle is normal during the spindle serial control startup.
1 : The first spindle was detected to have a fault during the spindle axis
serial control startup.
#0 (SHE) 0 : The serial communications module in the CNC is normal.
1 : The serial communications module in the CNC was detected to have a
fault.
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.