
APPENDIXG. ALARM LIST
B–63614EN/01
786
No. DescriptionFaulty location and remedy
SPM
indica-
tion(*1)
Message
7n36 SPN_n_ : OVERFLOW
ERROR
COUNTER
36 Check whether the position gain
value is too large, and correct the
value.
An error counter overflow occurred.
7n37 SPN_n_ : SPEED DE-
TECT PAR.
ERROR
37 Correct the value according to the
parameter manual.
The setting of the parameter for the
number of pulses in the speed de-
tector is incorrect.
7n39 SPN_n_ : 1–ROT Cs
SIGNAL ER-
ROR
39 1 Adjust the 1–rotation signal in the
pre–amplifier.
2 Check the cable shield status.
3 Replace the cable.
An incorrect relationship between
the 1–rotation signal and the num-
ber of AB phase pulses was de-
tected during Cs contour control.
7n40 SPN_n_ : NO 1–ROT Cs
SIGNAL DE-
TECT
40 1 Adjust the 1–rotation signal in the
pre–amplifier.
2 Check the cable shield status.
3 Replace the cable.
The 1–rotation signal is not gener-
ated during Cs contour control.
7n41 SPN_n_ : 1–ROT POS–
CODER ER-
ROR
41 1 Check and correct the parame-
ter.
2 Replace the cable.
3Re–adjust the BZ sensor signal.
1 The 1–rotation signal of the
spindle position coder (connector
JY4) is abnormal.
2 The 1–rotation signal (connector
JY2) of the MZ or BZ sensor is
abnormal.
3 Parameter setting error
7n42 SPN_n_ : NO 1–ROT.
POS–CODER
DETECT
42 1 Replace the cable.
2Re–adjust the BZ sensor signal.
1 The 1–rotation signal of the
spindle position coder (connector
JY4) is disconnected.
2 The 1–rotation signal (connector
JY2) of the MZ or BZ sensor is
disconnected.
7n43 SPN_n_ : DISCON. PC
FOR DIF. SP.
MODE
43 Replace the cable. The differential speed position cod-
er signal (connector JY8) in SPM
type 3 is abnormal.
7n44 SPN_n_ : CONTROL
CIRCUIT(AD)
ERROR
44 Replace the SPM control printed cir-
cuit board.
Abnormality in an SPM control cir-
cuit component was detected (A/D
converter abnormality).
7n46 SPN_n_ : SCREW
1–ROT POS–
COD. ALARM
46 1 Check and correct the parame-
ter.
2 Replace the cable.
3Re–adjust the BZ sensor signal.
An abnormality equivalent to alarm
41 was detected during thread cut-
ting operation.
7n47 SPN_n_ : POS–CODER
SIGNAL AB-
NORMAL
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 incor-
rect (Pulse interval mismatch).
7n49 SPN_n_ : HIGH CONV.
DIF. SPEED
49 Check whether the calculated differ-
ential speed value exceeds the
maximum motor speed.
In differential speed mode, the
speed of the other spindle con-
verted to the speed of the local
spindle has exceeded the allowable
limit (the differential speed is calcu-
lated by multiplying the speed of the
other spindle by the gear ratio).