This page continues the FANUC serial spindle alarm list, covering alarm codes from SP9034 to SP9092.
These alarms mainly involve:
- Parameter errors
- Encoder and sensor faults
- Spindle synchronization issues
- Communication and hardware failures
Understanding these alarms helps reduce downtime and improve CNC machine reliability.
FANUC Spindle Alarm List (SP9034–SP9092)
1) SP9034 – SP9043
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9034 | SSPA:34 Parameter Illegal | 34 | Parameter value exceeds allowable range | Refer to parameter manual and correct values |
| SP9036 | SSPA:36 Error Counter Overflow | 36 | Position error counter overflow | Reduce position gain |
| SP9037 | SSPA:37 Speed Detector Setting Error | 37 | Incorrect pulse setting of speed detector | Correct parameter settings |
| SP9041 | SSPA:41 One-turn Signal Error | 41 | Encoder one-turn signal abnormal or parameter error | Check parameters or replace cable |
| SP9042 | SSPA:42 No One-turn Signal | 42 | Encoder one-turn signal disconnected | Replace cable |
| SP9043 | SSPA:43 Differential Encoder Error | 43 | Differential encoder signal abnormal | Replace cable |
2) SP9046 – SP9050
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9046 | SSPA:46 Threading One-turn Signal Error | 46 | No one-turn signal during threading | Replace cable, sensor, or apply noise countermeasures |
| SP9047 | SSPA:47 Encoder Signal Error | 47 | A/B phase signal abnormal or inconsistent pulse interval | Improve wiring or replace cable |
| SP9049 | SSPA:49 Excessive Speed Value | 49 | Calculated differential speed exceeds motor limit | Check calculation and gear ratio |
| SP9050 | SSPA:50 Spindle Speed Too High | 50 | Commanded spindle speed exceeds allowable range | Verify speed calculation |
3) SP9051 – SP9057
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9051 | SSPA:51 DC LINK Voltage Low | 51 | Input voltage drop or contactor issue | Check voltage or replace MC |
| SP9052 | SSPA:52 ITP Signal Error 1 | 52 | CNC-SP interface signal stopped | Replace amplifier or CNC board |
| SP9053 | SSPA:53 ITP Signal Error 2 | 53 | CNC-SP interface signal stopped | Replace amplifier or CNC board |
| SP9054 | SSPA:54 Overload Current | 54 | Excessive load current | Review load condition |
| SP9055 | SSPA:55 Power Line Abnormal | 55 | Contactor power line signal abnormal | Replace contactor or check sequence |
| SP9056 | Cooling Fan Failure | 56 | Internal fan stopped | Replace fan |
| SP9057 | Regenerative Power Overload | 57 | Regenerative resistor overload or failure | Reduce load, check cooling, replace resistor if needed |
4) SP9058 – SP9073
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9058 | Inverter Overload | 58 | Heat sink temperature rise in power supply | Improve cooling or replace PS |
| SP9059 | Inverter Fan Failure | 59 | Power supply fan stopped | Replace PS |
| SP9061 | Semi-closed Loop Error | 61 | Large deviation between feedback systems | Check parameters, sensors, mechanics |
| SP9065 | Serial Spindle Warning | 65 | Excessive movement during pole detection | Check parameters and connections |
| SP9066 | Amplifier Communication Error | 66 | Communication failure between amplifiers | Replace cable or check wiring |
| SP9067 | FSC/EGB Command Error | 67 | Invalid command in EGB mode | Verify sequence |
| SP9069 | Exceeded Safe Speed | 69 | Motor exceeds safe speed limit | Check parameters and commands |
| SP9070 | Illegal Axis Data | 70 | Amplifier setting mismatch | Match configuration |
| SP9071 | Safety Parameter Error | 71 | Safety parameter abnormal | Re-enter parameters or replace board |
| SP9072 | Speed Detection Mismatch | 72 | CNC and amplifier speed mismatch | Replace board |
| SP9073 | Motor Sensor Disconnection | 73 | Feedback signal loss | Replace cable or sensor |
5) SP9074 – SP9092
| Alarm Code | Message | Amplifier Display | Cause | Troubleshooting |
|---|---|---|---|---|
| SP9074 | CPU Test Error | 74 | CPU abnormal | Replace board |
| SP9075 | Checksum Error | 75 | ROM CRC failure | Replace board |
| SP9076 | Safety Function Failure | 76 | Safety function not executed | Replace board |
| SP9077 | Axis Detection Mismatch | 77 | CNC and amplifier axis mismatch | Replace board |
| SP9078 | Safety Parameter Mismatch | 78 | Parameter inconsistency | Replace board |
| SP9079 | Initial Test Error | 79 | Failure during initialization | Replace board |
| SP9080 | Other Amplifier Alarm | 80 | Alarm from connected amplifier | Resolve external amplifier issue |
| SP9081 | Motor One-turn Signal Error | 81 | One-turn signal not detected | Adjust sensor or replace cable |
| SP9082 | No Motor One-turn Signal | 82 | No one-turn signal generated | Replace cable or adjust sensor |
| SP9083 | Motor Sensor Signal Error | 83 | Sensor signal abnormal | Replace cable or sensor |
| SP9084 | Spindle Sensor Disconnection | 84 | Feedback signal lost | Replace cable, check shielding |
| SP9085 | Spindle One-turn Signal Error | 85 | Signal detection failure | Adjust parameter or replace cable |
| SP9086 | No Spindle One-turn Signal | 86 | Signal not generated | Replace cable or sensor |
| SP9087 | Spindle Sensor Error | 87 | Feedback abnormal | Replace cable or sensor |
| SP9088 | Cooling Fan Failure | 88 | External fan stopped | Replace fan |
| SP9089 | Sub-module Error | 89 | Auxiliary module abnormal | Check connection or replace module |
| SP9090 | Abnormal Rotation | 90 | Incorrect motor rotation detected | Re-execute pole detection |
| SP9091 | Magnetic Pole Count Error | 91 | Pole position lost | Replace sensor or cable |
| SP9092 | Speed Deviation Exceeded | 92 | Speed deviation beyond parameter limit | Check parameter No.4464 |
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Reference Source: Beijing FANUC. This article is based on technical documentation provided by Beijing FANUC.
For More Fanuc CNC repair Cases and technical articles, please back to Fanuc Technical Support Center.
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