FANUC Spindle Amplifier Alarm Codes List

FANUC Alarm Codes >> Spindle Amplifier Alarm Codes

Tri Star CNC Services helps you diagnose and troubleshoot your FANUC spindle amplifier and other electronic components. If your CNC machine tool is throwing an error you need to track down the source of the problem—which isn’t always as easy as it sounds.

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If you’ve tried everything, scoured every alarm code list you can find and still can’t get your part back in production, contact us today. You’ll get free over-the-phone support , and, if necessary, a quote for repairs or replacements.

Fanuc Spindle Amplifier Alarms

Alarm Code

Description

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

4, 04

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

7, 07

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

9, 09

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

10

Input power voltage dropped.

11

PSM detected that the 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.

15

Spindle switching operation sequence was not executed correctly.

16

The memory (RAM) is faulty.

17

NVRAM is faulty.

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.

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.

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.

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.

34

Parameter data outside the specifiable range was set.

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.

36

Error counter overflowed.

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.

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.

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.

42

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

43

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

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.

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.

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.

50

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

51

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

52

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

53

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

54

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

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.

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.

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.

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.

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).

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).

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.

Fanuc Spindle Amplifier 700 Alarm Codes

Alarm Code Message Description
749 S–SPINDLE LSI ERROR It is serial communication error while system is executing after power
supply on. 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 EROR Same as alarm No. 752 (for the 3rd spindle)
774 SPINDLE–3 ABNORMAL TORQUE
ALM
Same as alarm No. 754 (for the 3rd spindle)
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Did you know this?
Setting Zero Return on Fanuc machines or any CNC Machine can sometimes be difficult. Each builder has their own way to set zero return through their own side of the control.

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