
APPENDIXA. ALARM LIST
B–63505EN/02
326
SPM
indica-
tion(*1)
DescriptionFaulty location and remedy
47 1 Replace the cable.
2Re–adjust the BZ sensor signal.
3 Correct the cable layout (vicinity of the power line).
1 The A/B phase signal of the spindle position coder
(connector JY4) is abnormal.
2 The A/B phase signal (connector JY2) of the MZ or
BZ sensor is abnormal.
The relationship between the A/B phase and 1–rotation
signal is incorrect (Pulse interval mismatch).
49 Check whether the calculated differential speed value
exceeds the maximum motor speed.
In differential speed mode, the speed of the other
spindle converted to the speed of the local spindle has
exceeded the allowable limit (the differential speed is
calculated by multiplying the speed of the other spindle
by the gear ratio).
50 Check whether the calculated value exceeds the maxi-
mum motor speed.
In spindle synchronization, the speed command cal-
culation value exceeded the allowable limit (the motor
speed is calculated by multiplying the specified spindle
speed by the gear ratio).
51 1 Check and correct the power supply voltage.
2 Replace the MC.
Input voltage drop was detected. (PSM alarm indication:
4) (Momentary power failure or poor MC contact)
52 1 Replace the SPM control printed circuit board.
2 Replace the spindle interface printed circuit board in
the CNC.
NC interface abnormality was detected (the ITP signal
stopped).
53 1 Replace the SPM control printed circuit board.
2 Replace the spindle interface printed circuit board in
the CNC.
NC interface abnormality was detected (the ITP signal
stopped).
56 Replace the SPM unit. The cooling fan in the SPM control circuit stopped.
57 1 Decrease the acceleration/deceleration duty.
2 Check the cooling condition (peripheral tempera-
ture).
3 If the cooling fan stops, replace the resistor.
4 If the resistance is abnormal, replace the resistor.
An overload was detected in the regenerative resis-
tance. (PSMR alarm indication: 8)
Thermostat operation or short–time overload was de-
tected.
The regenerative resistor was disconnected, or an ab-
normal resistance was detected.
58 1 Check the PSM cooling status.
2 Replace the PSM unit.
The temperature of the radiator of the PSM has in-
creased abnormally. (PSM alarm indication: 3)
59 Replace the SPM unit. The cooling fan in the PSM stopped. (PSM alarm indica-
tion: 2)