FANUC Spindle Amplifier Alarm Codes List

- (dash)

Unit is not ready or not commanded to run.

0, 00

Amplifier is ready (normal operating state)

A, A0

SPM control program is not operating.

A1, A2

Error was detected in SPM control program processing.

A3

Error was detected in the clock of the SPM control PCB.

A4

Parity error was detected in the SRAM on the SPM control PCB

1, 01

Spindle motor over temp

2, 02

Actual motor speed is largely deviated from the commanded speed.

3, 03

DC link fuse has blown

Faulty regen circuit or DC link circuit is faulty

4, 04

Detected that the 3-phase input to the main circuit of the PSM has an open phase.

Detected that the 3-phase input has an open phase.

5, 05

AF2 or AF3 fuse blown.

Control power supply fuse blown.

6, 06

Overspeed (Analog)

The temperature sensor is abnormal in the motor, or the temperature sensor cable is broken.

7, 07

The motor rotates at a speed exceeding 115% (standard setting) of the maximum allowable speed.

Overspeed (Digital)

8, 08

+24V overvoltage.

High input voltage.

9, 09

Temperature of the heat sink of the SPM main circuit has risen to the set value.

Heat sink is overheated.

10

Input power voltage dropped.

11

PSM detected that the DC link voltage was excessively high.

DC link overvoltage.

DC link voltage was excessively high.

12

Excessively large current flowed into the DC link of the main circuit.

13

Memory inside the CPU is faulty.

14

ROM alarm

15

Spindle switching operation sequence was not executed correctly.

Option alarm, possible spindle switch/output switch sequence faulty.

Spindle switch/output switch sequence faulty.

16

The memory (RAM) is faulty.

RAM in NOVRAM alarm

17

NVRAM is faulty.

18

ROM sum check alarm

ROM is defective

Program sum check error

19

The offset voltage of the phase U current detection circuit is excessively high.

20

The offset voltage of the phase V current detection circuit is excessively high.

21

VCMD offset alarm

Position sensor polarity setting incorrect

22

TSA offset alarm

23

ER offset alarm

24

The power to the CNC is turned off. (This symptom does not represent an error.) Serial communication data transferred between the CNC and spindle amplifier module contains an error.

25

Serial communication between the CNC and spindle amplifier module stopped.

Serial transfer data error

26

The sensor signal (for speed control) for Cs contour control has an error.

27

The sensor signal (position coder signal) for position control is abnormal.

28

The sensor signal (for position control) for Cs contour control is abnormal.

29

An excessive load (standard setting: load meter reading of 9 V) has been applied continuously for a certain period (standard setting: 30 seconds).

30

An excessively large current is detected at the input of the 3-phase main circuit of the PSM.

Defective power regeneration circuit.

31

The motor failed to rotate as specified, and has stopped or is rotating at a very low speed.

32

LSI memory for serial communication is abnormal. A check is made when the power is turned on.

33

The PSM could not be charged within a specified time. PSM input has an open phase.

DC link circuit problem.

34

Parameter data outside the specifiable range was set.

Incorrect parameter setting.

35

The gear ratio set in a parameter exceeds the value range allowable for internal processing. This alarm is issued with a parameter related to orientation of magnetic sensor type.

The gear ratio set in a parameter exceeds the value range allowable for internal processing.

36

Error counter overflowed.

Error counter over flow

37

After 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.

Incorrect parameter setting for the number of speed feedback pulses.

39

The position where the one-rotation signal for Cs contour control is generated is incorrect. This alarm is not issued when the parameter indicated below is not set.

Incorrect data ROM type for Cs contour control detector circuit or incorrect setting.

40

The one-rotation signal for Cs contour control is not generated.

41

The position where the one-rotation signal of the α position coder, BZ sensor, MZ sensor, α position coder S is incorrect.

Incorrect setting of parameter of number of position coder signal pulses.

42

The one-rotation signal of the α position coder, BZ sensor, MZ sensor, α position coder S is not generated.

Alarm for indicating position coder 1 -rotation signal not detected

43

The position coder signal of the spindle on the mater side used in the differential speed mode is disconnected.

Alarm for indicating disconnection of position coder signal for differential speed mode

44

An error occurred in the A/D converter.

46

The one-rotation signal of the position coder cannot be detected normally during thread cutting.

Alarm for indicating failure in detecting position coder 1 -rotation signal in thread cutting operation

47

The count value of α position coder signal pulses is abnormal. The pulse count value of the MZ sensor or BZ sensor is abnormal.

Incorrect setting of parameter for number of position coder signal pulses.

48

Position coder 1 -rotation signal abnormality

49

In the differential speed mode, the spindle speed on the master side (remote) converted to a motor speed on the slave side (local) exceeded the maximum allowable speed of the motor.

Excessive speed command calculation value in spindle synchronization control

50

A value obtained by internal calculation in spindle synchronization exceeded the allowable range.

Excessive speed command calculation value in spindle synchronization control

51

The PSM detected that the DC link voltage was excessively low.

Undervoltage at DC link section

52

The synchronization signal (ITP) in communication data transferred to and from the CNC stopped.

ITP signal abnormality I

53

The synchronization signal (ITP) in communication data transferred to and from the CNC stopped.

ITP signal abnormality II

54

A large current flowing in the motor for a long time was detected.

Overload current alarm

55

In spindle switching control or output switching control, a mismatch between the switching request signal (SPSL or RSL) and the power line state check signal (MCFN, MFNHG, RCH, or RCHHG) continues during motor activation.

Power line abnormality in spindle switching/output switching

56

Internal cooling circuit faulty.

57

The temperature of the regenerative resistance of the PSM (resistance regenerative type) is excessively high. The PSM is faulty.

58

The temperature of the main circuit-cooling fan of the PSM is abnormally high.

59

The internal cooling fan of the PSM stopped.

61

Excessive semi-closed loop/closed loop position error alarm

65

Abnormal travel distance in magnetic pole determination operation

66

Error occurred during communication (connector JX4) between spindle and amplifier.

69

This alarm can be issued only when Dual Check Safety is in use. The alarm occurs if, in safety signal mode C (a guard open request was entered to open the guard), the spindle motor rotation speed exceeds entered to open the guard), the spindle motor rotation speed exceeds the safety speed.

70

This alarm can be issued only when Dual Check Safety is in use. The spindle amplifier connection status does not match the hardware setting.

71

This alarm can be issued only when Dual Check Safety is in use. A safety parameter error occurred.

72

This 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 speed check.

73

The signal of the motor sensor is disconnected.

74

This alarm can be issued only when Dual Check Safety is in use. The CPU test failed to end normally.

75

This alarm can be issued only when Dual Check Safety is in use. An error occurred in the CRC test.

76

This alarm can be issued only when Dual Check Safety is in use. The spindle safety function has not been executed.

77

This 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.

78

This alarm can be issued only when Dual Check Safety is in use. The result of spindle amplifier safety parameter check does not match the result of the CNC safety parameter check.

79

This alarm can be issued only when Dual Check Safety is in use. An abnormal operation was detected in the initial test.

80

An alarm was generated on the other spindle amplifier.

81

The position where the one-rotation signal of the motor sensor is generated is incorrect.

82

The one-rotation signal of the motor sensor is not generated.

83

The 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.

84

The spindle sensor signal was disconnected. Refer to Alarm Code 73 for this alarm trouble shooting.

85

The one-rotation signal of the spindle sensor occurred in an incorrect location. Refer to Alarm Code 81 for this alarm trouble shooting.

86

No spindle sensor one-rotation signal occurred. Refer to Alarm Code 82 for this alarm trouble shooting.

87

A spindle sensor signal is abnormal. Refer to Alarm Code 83 for this alarm trouble shooting.

88

External cooling circuit faulty.

89

Sub module SM (SSM) error

90

Unexpected rotation alarm

91

Pole position count miss alarm

92

Velocity command-dependent overspeed alarm

A, A1, A2

The control program is not running. An error was detected when the control program was running.

b0

An error occurred in communication between amplifier modules (SPM, SVM, and PSM).

b1

Converter: control power supply low voltage

b2

Converter: excessive regenerative power

b3

C0, C1, C2

An error occurred in serial communication data between the CNC and spindle amplifier module.

C3

In 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).

d0

Speed polarity error in torque tandem operation

d2

Serial data error

d3

Data transfer error

d4

Soft phase alarm

d7

Device communication error

d9

Pulse error alarm

E0

Count error alarm

E1

Serial sensor one-rotation signal not detected

4, 11, 30, 33, 51, 57, 58, b1, b2, b3

If the SPM status display is 4, 11, 30, 33, 51, 57, 58, b1, b2, or b3 This status display means that an alarm condition occurred in the PSM. Check the status display of the PSM.

749

S–SPINDLE LSI ERROR

It is serial communication error while system is executing after power supply on. The following reasons can be considered:

1. Optical cable connection is fault or cable is not connected or cable is cut.
2. MAIN CPU board or option 2 board is fault.
3. Spindle amp. printed board is fault.

If this alarm occurs when CNC power supply is turned on or when this alarm can not be cleared even if CNC is reset, turn off the power supply also turn off the power supply in spindle side.

750

SPINDLE SERIAL LINK START FAULT

This alarm is generated when the spindle control unit is not ready for starting correctly when the power is turned on in the system with the serial spindle.

The four reasons can be considered as follows:

1. An improperly connected optic cable, or the spindle control unit’s power is OFF.
2. When the NC power was turned on under alarm conditions other than SU–01 or AL–24 which are shown on the LED display of the spindle control unit. In this case, turn the spindle amplifier power off once and perform startup again.
3. Other reasons (improper combination of hardware) This alarm does not occur after the system including the spindle control unit is activated.
4. The second spindle (when SP2, bit 4 of parameter No. 3701, is 1) is in one of the above conditions 1) to 3). 

See diagnostic display No. 409 for details.

751

FIRST SPINDLE ALARM DETECTION (AL–XX)

This alarm indicates in the NC that an alarm is generated in the spindle unit of the system with the serial spindle. The alarm is displayed in form AL–XX (XX is a number). Refer to 2.3 or 2.4 Alarms displayed on spindle servo unit. The alarm number XX is the number indicated on the spindle amplifier. The CNC holds this number and displays on the screen.

752

FIRST SPINDLE MODE CHANGE FAULT

This alarm is generated if the system does not properly terminate a mode change. The modes include the Cs contouring, spindle positioning, rigid tapping, and spindle control modes. The alarm is activated if the spindle control unit does not respond correctly to the mode change command issued by the NC.

754

SPINDLE–1 ABNORMAL TORQUE ALM

Abnormal first spindle motor load has been detected.

761

SECOND SPINDLE ALARM DETECTION (AL–XX)

Refer to alarm No. 751. (For 2nd spindle)

762

SECOND SPINDLE MODE CHANGE FAULT

Refer to alarm No. 752. (For 2nd spindle)

764

SPINDLE–2 ABNORMAL TORQUE ALM

Same as alarm No. 754 (for the 2nd spindle)

771

SPINDLE–3 ALARM DETECT (AL–XX)

Same as alarm No. 751 (for the 3rd spindle)

772

SPINDLE–3 MODE CHANGE ERROR

Same as alarm No. 752 (for the 3rd spindle)

774

SPINDLE–3 ABNORMAL TORQUE ALM

Same as alarm No. 754 (for the 3rd spindle)