Fanuc Alpha I Spindle Module Alarms and Error Codes.

Fanuc Alpha I Spindle Module Alarms

Covering the early versions such as the 6111 aiSP (TYPE-1) or 6112 SPMi (Type-2) 6116 aiC or SPMCi and the high voltage versions the 6121 and the 6122 type A and type B respectively.

Please contact us if you need testing, a repair or an exchange part. For further information please visit our dedicated Alpha I Spindle Module  Page. 

AlarmDescription of Alarm/Error
01The inside temperature of the motor is higher than the specified temperature
02The actual motor speed is largely deviated from the commanded speed
03The fuse of the DC link has blown (The voltage at the DC link is insufficient) This alarm is checked when emergency stop is cancelled.
06The temperature sensor is abnormal, or the temperature sensor cable is broken.
07The motor rotates at a speed exceeding 115% (standard setting) of the maximum allowable speed.
09The temperature of the heat sink of the SPM main circuit has risen abnormally. This alarm is issued for SPM-15i and later.With SPM-2.2i to SPM-11i however, Alarm 12 is issued for the same cause.
12An excessively large current flowed into the DC link of the main circuit.
15In output switching control or spindle switching control, the switching operation sequence was not executed correctly.  This is issued if one second or more elapses from the transition of a switch request signal (SPSL or RSL) until a power lead state check signal (MCFN, MFNHG, RCH or RCHHG) makes a transition.
18A sum check is abnormal.  If this alarm is issued, replace the SPM or SPM control printed-circuit board.
19 / 20The offset voltage of the phase U (19) or phase V (20) current detection circuit is excessively high. A check is made when the power is turned on.
21The specified polarity of the position sensor is incorrect.
24Serial communication data transferred between the CNC and spindle amplifier module contains an error.
27The signal of the position code is disconnected.
29An excessive load (standard setting: load meter reading of 9 V) has been applied continuously for a certain period (standard setting: 30 seconds).
31The motor failed to rotate as specified, and has stopped or is rotating at a very low speed.
36The error counter overflowed.
37After emergency stop signal input, the motor is accelerated without being decelerated. This alarm is issued also when the motor is not deactivated

(the motor is not decelerated completely) when the acceleration/deceleration time (initial parameter setting: 10 seconds) has elapsed after emergency stop signal input.

41The position where the one-rotation signal of the position coder is generated is incorrect.
42The one-rotation signal of the position coder is not generated.
46The one-rotation signal of the position coder cannot be detected normally during thread cutting.
47The count value of position coder signal pulses is abnormal. Phases A and B for the position coder have a feedback pulse count of 4096 p/rev per spindle rotation.

The SPM checks the pulse counts of phases A and B equivalent to the position coder each time a one-rotation signal is generated.

The alarm is issued when a pulse count beyond the specified range is detected.

50A value obtained by internal calculation in spindle synchronization exceeded the allowable range.
52 / 53The synchronization signal (ITP) in communication data transferred to and from the CNC stopped.
54A large current flowing in the motor for a long time was detected.
55In spindle switching control or output switching control, a mismatch between the switching request signal (SPSL or RSL) and the power lead state check signal

As a result MCFN, MFNHG, RCH, or RCHHG continues during motor activation.

56The cooling fan for the control circuit section has stopped.
66An error occurred during communication (connector JX4) between spindle and amplifier.
69This alarm can be issued only when Dual Check Safety is in use. The alarm occurs if, in safety signal mode C, the spindle motor rotation speed exceeds the safety speed.
70This alarm can be issued only when Dual Check Safety is in use. The spindle amplifier connection status does not match the hardware setting.
71This alarm can be issued only when Dual Check Safety is in use. A safety parameter error occurred.
72This alarm can be issued only when Dual Check Safety is in use. The result of the spindle amplifier speed check does not match the result of the CNC check.
73The signal of the motor sensor is disconnected.
74This alarm can be issued only when Dual Check Safety is in use. The CPU test failed to end normally
75This alarm can be issued only when Dual Check Safety is in use. An error occurred in the CRC test.
76This alarm can be issued only when Dual Check Safety is in use. The spindle safety function has not been executed.
77This alarm can be issued only when Dual Check Safety is in use. The result of the spindle amplifier axis number check does not match the result of the CNC axis number check.
78This alarm can be issued only when Dual Check Safety is in use. The result of the spindle amplifier safety parameter check does not match the result of the CNC safety parameter check.
79This alarm can be issued only when Dual Check Safety is in use. An abnormal operation was detected in the initial test.
81The position where the one-rotation signal of the motor sensor is generated is incorrect.
82The one-rotation signal of the motor sensor is not generated.
83The SPM checks the pulse counts of phases A and B each time a one-rotation signal is generated. The alarm is issued when a pulse count beyond the specified range is detected.
84The spindle sensor signal was disconnected.
85The one-rotation signal of the spindle sensor occurred in an incorrect location.
86No spindle sensor one-rotation signal occurred.
87A spindle sensor signal is abnormal.
88The heat sink cooling fan is not running.
A, A1, A2The control program is not running, therefore an error was detected when the control program was running.
b0An error occurred in communication between amplifier modules (SPM, SVM and PSM).
C0, C1, C2An error occurred in serial communication data between the CNC and spindle amplifier module.
C3In spindle switching a mismatch is found between the switching request signal (SPSL) and the internal status of the motor/spindle sensor signal switching circuit (submodule SW).

Please note 4, 11 and 30 are combination alarms and need to be referenced with the other alarming part of the CNC control and Fanuc alpha drive system.