9. TROUBLESHOOTING
9.2 Remedies for alarms
When any alarm has occurred, eliminate its cause, ensure safety, then reset the
CAUTION alarm, and restart operation. Otherwise, injury may occur.
If an absolute position erase alarm (25) occurred, always make home position setting again. Otherwise, misoperation may occur.
POINT
When any of the following alarms has occurred, always remove its cause and allow about 30 minutes for cooling before resuming operation. If operation is resumed by switching control circuit power off, then on to reset the alarm, the servo amplifier and servo motor may become faulty.
Regenerative error (30) Overload 1 (50) Overload 2 (51)
The alarm can be deactivated by switching power off, then on or by the error reset command CPU reset from the servo system controller. For details, refer to Section 9.1.
When an alarm occurs, the dynamic brake is operated to stop the servomotor. At this time, the display indicates the alarm No.
The servo motor comes to a stop. Remove the cause of the alarm in accordance with this section. The optional servo configuration software may be used to refer to the cause.
Display | Name | Definition |
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10 | Undervoltage | Power supply | 1. | Power supply voltage is low. | Review the power supply. | |||||
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| voltage dropped. | 2. | There was an instantaneous |
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| B:160V or |
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| control power failure of 60ms or |
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| less |
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| B1:83V or | 3. | Shortage of power supply capacity |
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| less |
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| caused the power supply voltage to |
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| drop at start, etc. |
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| 4. | Power was restored after the bus |
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| voltage had dropped to 200VDC. |
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| (Main circuit power switched on |
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| within 5s after it had switched off.) |
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| 5. | Faulty parts in the servo amplifier | Change the servo amplifier. | ||||
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| Checking method |
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| Alarm (10) 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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12 | Memory error 1 | RAM, memory fault | Faulty parts in the servo amplifier | |||
13 | Clock error | Printed board fault |
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15 | Memory error 2 |
| Alarm (any of 12,13 and 15) | |||
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| occurs if power is switched on | ||
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| after CN1A, CN1B and CN3 | ||
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| all connectors are disconnected. | ||
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Change the servo amplifier.
16 | Encoder error 1 | Communication | 1. | CN2 connector disconnected. | Connect correctly. |
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| error occurred | 2. | Encoder fault | Change the servo motor. |
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| between encoder | 3. | Encoder cable faulty | Repair or change cable. |
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| and servo amplifier. | |||
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| (Wire breakage or shorted) |
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9 - 2
