3. SIGNALS AND WIRING
3.3 Alarm occurrence timing chart
When an alarm has occurred, remove its cause, make sure that the operation CAUTION signal is not being input, ensure safety, and reset the alarm before restarting
operation.
When an alarm occurs in the servo amplifier, the base circuit is shut off and the servo motor is coated to a stop. Switch off the main circuit power supply in the external sequence. To deactivate the alarm, power the control circuit off, then on or give the error reset or CPU reset command from the servo system controller. However, the alarm cannot be deactivated unless its cause is removed.
Main circuit | power | ON | ||
Control circuit | ||||
|
| OFF | ||
Base circuit |
|
| ON | |
|
| OFF | ||
|
|
| ||
Dynamic brake |
| Valid | ||
Invalid | ||||
|
| |||
ON | ||||
(from controller) |
| OFF | ||
Alarm |
|
|
| |
Reset command |
| ON | ||
(from controller) |
| OFF | ||
| Power off | Power on |
|
| |
Brake operation | Brake operation |
|
NO | YES | NO |
1s
50ms or more | 60ms or more |
Alarm occurs. Remove cause of trouble.
(1)Overcurrent, overload 1 or overload 2
If operation is repeated by switching control circuit power off, then on to reset the overcurrent (32), overload 1 (50) or overload 2 (51) alarm after its occurrence, without removing its cause, the servo amplifier and servo motor may become faulty due to temperature rise. Securely remove the cause of the alarm and also allow about 30 minutes for cooling before resuming operation.
(2)Regenerative alarm
If operation is repeated by switching control circuit power off, then on to reset the regenerative (30) alarm after its occurrence, the external regenerative brake resistor will generate heat, resulting in an accident.
(3)Instantaneous power failure
Undervoltage (10) occurs if power is restored after a 60ms or longer power failure of the control circuit power supply or after a drop of the bus voltage to or below 200VDC. If the power failure persists further, the control circuit power switches off. When the power failure is reset in this state, the alarm is reset and the servo amplifier returns to the initial state.
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