
APPENDIX
B–63524EN/01
G. ALARM LIST
879
No. DescriptionFaulty location and remedy
SPM in-
dica-
tion(*1)
Message
9n50 SPN_n_ : SPNDL CON-
TROL OVER-
SPEED
50 Check whether the calculated value
exceeds the maximum motor speed.
In spindle synchronization, the speed
command calculation value exceed-
ed the allowable limit (the motor
speed is calculated by multiplying the
specified spindle speed by the gear
ratio).
9n51 SPN_n_ : LOW VOLT DC
LINK
51 1 Check and correct the power sup-
ply voltage.
2 Replace the MC.
Input voltage drop was detected.
(PSM alarm indication: 4) (Momen-
tary power failure or poor MC contact)
9n52 SPN_n_ : ITP SIGNAL
ABNORMAL I
52 1 Replace the SPM control printed
circuit board.
2 Replace the spindle interface
printed circuit board in the CNC.
NC interface abnormality was de-
tected (the ITP signal stopped).
9n53 SPN_n_ : ITP SIGNAL
ABNORMAL II
53 1 Replace the SPM control printed
circuit board.
2 Replace the spindle interface
printed circuit board in the CNC.
NC interface abnormality was de-
tected (the ITP signal stopped).
9n54 SPN_n_ : OVERLOAD
CURRENT
54 Review the load state. An overload current was detected.
9n55 SPN_n_ : POWER LINE
SWITCH ER-
ROR
55 1 Replace the magnetic contactor.
2 Check and correct the sequence.
The power line state signal of the
magnetic contactor for selecting a
spindle or output is abnormal.
9n56 SPN_n_ : INNER COOL-
ING FAN STOP
56 Replace the SPM unit. The cooling fan in the SPM control cir-
cuit stopped.
9n57 SPN_n_ : EX DECEL-
ERATION
POWER
57 1 Decrease the acceleration/decel-
eration duty.
2 Check the cooling condition (pe-
ripheral temperature).
3 If the cooling fan stops, replace the
resistor.
4 If the resistance is abnormal, re-
place the resistor.
An overload was detected in the re-
generative resistance. (PSMR alarm
indication: 8)
Thermostat operation or short–time
overload was detected.
The regenerative resistor was dis-
connected, or an abnormal resis-
tance was detected.
9n58 SPN_n_ : OVERLOAD IN
PSM
58 1 Check the PSM cooling status.
2 Replace the PSM unit.
The temperature of the radiator of the
PSM has increased abnormally.
(PSM alarm indication: 3)
9n59 SPN_n_ : COOLING FAN
STOP IN PSM
59 Replace the SPM unit. The cooling fan in the PSM stopped.
(PSM alarm indication: 2)
9n62 SPN_n_ : MOTOR VCMD
OVERFLOWED
62 Check and correct the parameters.
(No. 4021, 4056~4059)
The specified motor speed is too
large.
9n66 SPN_n_ : AMP MODULE
COMMUNICA-
TION
66 1 Replace the cable.
2 Check and correct the connection.
An error was found in communication
between amplifiers.
9n73 SPN_n_ : MOTOR SEN-
SOR DISCON-
NECTED
73 1 Replace the feedback cable.
2 Check the shield processing.
3 Check and correct the connection.
4 Adjust the sensor.
The motor sensor feedback signal is
not present.