
APPENDIXA. ALARM LIST
B–63505EN/02
324
SPM
indica-
tion(*1)
DescriptionFaulty location and remedy
11 1 Check the selected PSM.
2 Check the input power voltage and change in power
during motor deceleration. If the voltage exceeds
253 VAC (for the 200–V system) or 530 VAC (for the
400–V system), improve the power supply imped-
ance.
Overvoltage of the DC link section of the PSM was de-
tected. (PSM alarm indication: 7)
PSM selection error. (The maximum output specifica-
tion of the PSM is exceeded.)
12 1 Check the motor insulation status.
2 Check the spindle parameters.
3 Replace the SPM unit.
The motor output current is abnormally high.
A motor–specific parameter does not match the motor
model.
Poor motor insulation
15 1 Check and correct the ladder sequence.
2 Replace the switching MC.
The switch sequence in spindle switch/output switch op-
eration is abnormal.
The switching MC contact status check signal and com-
mand do not match.
16 Replace the SPM control printed circuit board. Abnormality in an SPM control circuit component is de-
tected. (RAM for external data is abnormal.)
18 Replace the SPM control printed circuit board. Abnormality in an SPM control circuit component is de-
tected. (Program ROM data is abnormal.)
19 Replace the SPM unit. Abnormality in an SPM component is detected. (The ini-
tial value for the U phase current detection circuit is ab-
normal.)
20 Replace the SPM unit. Abnormality in an SPM component is detected. (The ini-
tial value of the V phase current detection circuit is ab-
normal.)
24 1 Place the CNC–to–spindle cable away from the pow-
er cable.
2 Replace the cable.
The CNC power is turned off (normal power–off or bro-
ken cable).
An error is detected in communication data transferred
to the CNC.
26 1 Replace the cable.
2Re–adjust the pre–amplifier.
The signal amplitude of the detection signal (connector
JY2) on the Cs contour control motor side is abnormal.
(Unconnected cable, adjustment error, etc.)
27 1 Replace the cable.
2Re–adjust the BZ sensor signal.
1 The spindle position coder (connector JY4) signal is
abnormal.
2 The signal amplitude (connector JY2) of the MZ or BZ
sensor is abnormal.
(Unconnected cable, adjustment error, etc.)
28 1 Replace the cable
2Re–adjust the pre–amplifier.
The position detection signal (connector JY5) for Cs
contour control is abnormal.
(Unconnected cable, adjustment error, etc.)
29 Check and correct the load status. Excessive load has been applied continuously for a cer-
tain period of time. (This alarm is issued also when the
motor shaft has been locked in the excitation state.)
30 Check and correct the power supply voltage. Overcurrent is detected in PSM main circuit input. (PSM
alarm indication: 1)
Unbalanced power supply.
PSM selection error (The maximum PSM output specifi-
cation is exceeded.)