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5. OPERATION
5-2
5.3 Starting operation
The drive unit detects the magnetic pole of the motor at every start. The
magnetic pole detection time is approx. 0.1s (85ms
±
15ms) after the start signal
and speed signal are input. During this period, the motor remains stopped and
starts running after magnetic pole detection is finished.
When inputting the speed command from the parameter unit or as a contact
signal
ON
ON
Approx. 0.1s
Start signal
Speed command
Motor speed
RUN signal
5 to 35ms
When inputting the speed command as an analog signal
300r/min
ON
5 to 35ms
ON
Approx. 0.1s
Start signal
Speed command
Motor speed
RUN signal
MEMO
When the start signal is entered after the input of the speed
command, the motor starts running approx. 0.1s after the input of
the start signal.
When the analog signal is used to give the speed command, the
motor starts running approx. 0.1s after the speed command has
reached the value equivalent to 300r/min.
Turning on the reverse rotation (forward rotation) signal during
forward rotation (reverse rotation) operation decelerates the motor
to a stop, keeps it stopped for about 2s, and then starts it running in
the reverse rotation (forward rotation) direction.
NOTICE
When restarting the motor after decelerating it to a stop, start the
motor after ensuring that it has stopped. If you start the motor that
has not yet come to a complete stop, sufficient starting torque may
not be provided.
Do not switch the AC input power off while the motor is running at
high speed. Doing so may activate the undervoltage protective
circuit instantaneously under the influence of a motor-generated
voltage.
Refer to: Chapter 6, 6.1.1 Protective function activated