9. TROUBLESHOOTING
Display | Name | Definition |
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51 | Overload 2 | Machine collision or | 1. | Machine struck something. | 1. | Review operation pattern. | ||||
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| the like caused max. |
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| 2. | Install limit switches. |
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| output current to | 2. | Wrong connection of servo motor. | Connect correctly. | |||||
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| flow successively for |
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| Servo amplifier's output terminals |
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| several seconds. |
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| U, V, W do not match servo |
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| Servo motor locked: |
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| motor's input terminals U, V, W. |
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| 1s or more | 3. | Servo system is instable and | 1. | Repeat acceleration/deceleration to | ||||
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| hunting. |
| execute auto tuning. | |||
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| 2. | Change auto tuning response setting. |
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| 3. | Set auto tuning to OFF and make gain |
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| adjustment manually. |
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| 4. | Encoder faulty. | Change the servo motor. | |||||
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| Checking method |
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| When the servo motor shaft is |
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| rotated slowly with the servo off, |
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| the cumulative feedback pulses |
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| should vary in proportion to the |
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| rotary angle. If the indication |
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| skips or returns midway, the |
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| encoder is faulty. |
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52 | Error excessive | Droop pulse value of | 1. | Acceleration/deceleration time | Increase the acceleration/deceleration | |||||
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| the deviation |
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| constant is too small. | time constant. | ||||
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| counter exceeded | 2. | Torque limit value is too small. | Increase the torque limit value. | |||||
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| the parameter | 3. | Motor cannot be started due to | 1. | Review the power supply capacity. | ||||
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| No.31 setting value |
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| torque shortage caused by power | 2. | Use servo motor which provides larger | |||
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| (initial value: |
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| supply voltage drop. |
| output. | |||
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| 8 revolutions). | 4. | Position control gain 1 (parameter | Increase set value and adjust to ensure | |||||
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| No.13) value is small. | proper operation. | ||||
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| 5. | Servo motor shaft was rotated by | 1. | When torque is limited, increase the | ||||
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| external force. |
| limit value. | |||
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| 2. | Reduce load. |
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| 3. Use servo motor that provides larger | |
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| output. |
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| 6. | Machine struck something. | 1. | Review operation pattern. | ||||
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| 2. | Install limit switches. |
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| 7. | Encoder faulty | Change the servo motor. | |||||
8.Wrong connection of servo motor. Connect correctly. Servo amplifier's output terminals
U, V, W do not match servo motor's input terminals U, V, W.
8E | Serial | Serial | 1. Communication cable fault |
| Repair or change the cable. | |||
| communication | communication |
| (Open cable or short circuit) |
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| error | error occurred |
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| 2. Communication device (e.g. |
| Change the communication device (e.g. | |||||
| between servo |
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| amplifier and |
| personal computer) faulty |
| personal computer). | ||
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| communication |
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| device (e.g. personal |
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| computer). |
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88 | Watchdog | CPU, parts faulty | Fault of parts in servo amplifier |
| Change servo amplifier. | |||
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| Checking method |
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| Alarm (88) occurs if power is |
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| switched on after CN1A, CN1B |
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| and CN3 connectors are |
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| disconnected. |
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