9. TROUBLESHOOTING
Display | Name | Definition |
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| Cause | Action | |||
31 | Overspeed | Speed has exceeded | 1. Small acceleration/deceleration | Increase acceleration/deceleration time | ||||||
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| the instantaneous |
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| time constant caused overshoot to | constant. | ||||
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| permissible speed. |
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| be large. |
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| 2. | Servo system is instable to cause | 1. Reset servo gain to proper value. | |||||
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| overshoot. |
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| 2. If servo gain cannot be set to proper | |
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| value: |
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| 1) Reduce load inertia moment ratio; or |
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| 2) Reexamine acceleration/ |
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| deceleration time constant. |
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| 3. | Encoder faulty. |
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| Change the servo motor. | ||
32 | Overcurrent | Current that flew is | 1. Short occurred in servo amplifier | Correct the wiring. | ||||||
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| higher than the |
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| output phases U, V and W. |
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| permissible current | 2. Transistor of the servo amplifier | Change the servo amplifier. | ||||||
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| of the servo |
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| faulty. |
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| amplifier. |
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| Checking method |
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| Alarm (32) occurs if power is |
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| switched on after U,V and W |
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| are disconnected. |
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| 3. | Ground fault occurred in servo | Correct the wiring. | |||||
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| amplifier output phases U, V and |
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| W. |
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| 4. | External noise caused the | Take noise suppression measures. | |||||
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| overcurrent detection circuit to |
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| misoperate. |
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33 | Overvoltage | Converter bus | 1. Regenerative brake option is not | Use the regenerative brake option. | ||||||
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| voltage exceeded |
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| used. |
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| 400V. | 2. | Though the regenerative brake | Make correct setting. | |||||
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| option is used, the parameter No. |
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| 2 setting is " | 00 (not used)". |
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| 3. | Lead of | 1. Change lead. | |||||
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| resistor or regenerative brake | 2. Connect correctly. | ||||
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| option is open or disconnected. |
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| 4. | Regenerative transistor faulty. | Change servo amplifier | |||||
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| 5. | Wire breakage of | 1. For wire breakage of | |||||
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| regenerative brake resistor or | regenerative brake resistor, change | ||||
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| regenerative brake option | servo amplifier. | ||||
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| 2. For wire breakage of regenerative brake |
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| option, change regenerative brake |
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| option. |
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| 6. | Power supply voltage high. | Review the power supply. | |||||
34 | CRC error | Bus cable is faulty | 1. Bus cable disconnected. | Connect correctly. | ||||||
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| 2. | Bus cable fault |
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| Change the cable. | ||
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| 3. Noise entere bus cable. | Take measures against noise. | ||||||
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| 4. | Termination connector | Connect termination connector. | |||||
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| disconnected. |
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| 5. | The same No. exists in the servo | Set correctly. | |||||
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| amplifier side axis setting. |
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9 - 4
