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5. OPERATION
5-7
5
5.3.5 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 operation panel 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
100r/min
ON
5 to 35ms
ON
Approx. 0.1s
S
tart signal
S
peed 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
100r/min (value set in Pr. 13).
For forward/reverse rotation operation, there is an about 0.1s to 3.0s stop
depending on the operating conditions.
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 torque may not be provided. Especially when the load
torque (friction torque) is small and the load inertia moment is large, the motor will
run slightly even after the voltage braking operation has stopped. Therefore, restart
the motor after making sure that it has stopped completely.
Refer to: Chapter 8, 8.5.4 Stopping operation