sh030051g.pdf - 第342页
13 - 41 13. SERVO AMPLIFIERS WI TH A LARGE CAPACITY ( 30k TO 55kW ) 2) Drive unit When an alarm occurs on the drive unit, the base circ uit is shut off and the servo motor coasts. When using a dynamic brake (option), the…
13 - 40
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
(2) Alarm occurrence timing chart
CAUTION
When an alarm has occurred, remove its cause, make sure that the operation
signal is not being input, ensure safety, and reset the alarm before restarting
operation.
As soon as an alarm occurs, make the Servo off status and interrupt the main
circuit power.
(a) When control function of magnetic contactor is enabled
1) Converter unit
When an alarm occurs in the converter unit, the magnetic contactor is turned off and the main circuit
magnetic contactor is shut off. The drive unit in operation stops. To deactivate the alarm, turn the
control circuit power off, then on or request the operation from the driver unit. However, the alarm
cannot be deactivated unless its cause is removed.
b)
Converter unit control
power supply
Drive unit control
power supply
Main circuit
power supply
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Servo-on command
(from controller)
Drive unit alarm
Reset command
(from controller)
Base circuit
OFFONOFF
1.5s
50ms or more
Converter unit alarm
OFFOFF
ON OFF
(3s) (3s)
a) d)
Alarm occurrence
ON
Alarm occurrence
c)
a) in Figure
b) c) in Figure
d) in Figure
Even if an alarm occurs in the converter when the drive unit is at servo off, the
drive unit does not detect the alarm.
To deactivate the alarm of the converter unit, turn the power of the converter unit
off, and then on (b)) or make the drive unit servo on (c)). (Refer to section 13.6.1.)
If an alarm occurs in the converter when the drive unit is at servo on, the alarm
also occurs in the drive unit and the drive unit becomes servo off.
13 - 41
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
2) Drive unit
When an alarm occurs on the drive unit, the base circuit is shut off and the servo motor coasts. When
using a dynamic brake (option), the dynamic brake is activated to stop the servo motor. To deactivate
the alarm, power the control circuit off, then on, turn the reset (RES) on or CPU reset command.
However, the alarm cannot be deactivated unless its cause is removed.
50ms or more
Converter unit control
power supply
Drive unit control
power supply
Main circuit
power supply
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Servo-on command
(from controller)
Drive unit alarm
Reset command
(from controller)
Base circuit
OFFONOFF
1.5s
Converter unit alarm
(3s) (3s)
Alarm occurrence
OFF
a) a)
a) in Figure After completing to start the drive unit, the main circuit power is supplied while the
drive unit and the converter unit have no alarms.
13 - 42
13. SERVO AMPLIFIERS WITH A LARGE CAPACITY
(
30k TO 55kW
)
(b) When controlling magnetic contactor by external sequence
1) Converter unit
When an alarm occurs on the converter unit, the servo-on turns OFF; however, the main circuit power
supply is not shut off. Therefore, shut off the main circuit power supply by the external sequence.
After cancelling the alarm on the converter unit (when an alarm is also occurring on the drive unit
after cancelling the alarm on the drive unit as well), turning ON the reset command enables to
operate again.
b)
Converter unit control
power supply
Drive unit control
power supply
Main circuit
power supply
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Servo-on command
(from controller)
Drive unit alarm
Reset command
(from controller)
Base circuit
OFFONOFF
1.5s
50ms or more
Converter unit alarm
OFFOFF
ON OFF
(3s) (3s)
a) d)
Alarm occurrence
ON
Alarm occurrence
c)
ON
OFF
e)
a) in Figure
b) c) in Figure
d) in Figure
e) in Figure
Even if an alarm occurs in the converter when the drive unit is at servo off, the
drive unit does not detect the alarm.
To deactivate the alarm of the converter unit, turn the power of the converter unit
off, and then on (b)) or make the drive unit servo on (c)). (Refer to section 13.6.1.)
If an alarm occurs in the converter unit when the drive unit is at servo on, the
alarm also occurs in the drive unit and the drive unit becomes servo off.
Shut off the main circuit power supply by the external sequence as soon as an
alarm occurs.