Inovance MD330H - Page 58

MD380 User Manual Operation, Display and Application Example
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Figure 4-9 Frequency curve of direct start
F6-07
(Acceleration/
Deceleration mode)
F0-12
(
Frequency
upper limit)
F0-17
(Acceleration
time)
Frequency (f)
Time
(t)
Running
command
F6-00 = 0 (Direct start)
F6-03
(Startup frequency)
F6-06
(Startup DC
braking time)
F6-04
(Startup frequency
holding time)
0
1
2
F0-12
(Frequency
upper limit)
F0-17
(Acceleration
time)
Frequency (f)
Time (t)
Running
command
Default:
F6-06 = 0.0s
F6-03 = 0.00 Hz
F6-04 = 0.0s
F6-07 = 0
F6-00 = 0 (Direct start)
• F6-00 = 1 (Rotational speed tracking restart)
It is applicable to large-inertia load. The frequency curve in this mode is shown in the
following gure. If the load motor is still rotating due to the inertia when the AC drive
starts, this mode is used to prevent start overcurrent.
Figure 4-10 Frequency curve of rotational speed tracking restart
F0-12
(Frequency
upper limit)
F0-17
(Acceleration
time)
Frequency (f)
Time (t)
Running
command
Initial rotational speed
of the load motor
F6-00 = 1 (Rotational speed
tracking restart)
Automatic rotational
speed tracking detection
F0-12
(Frequency
upper limit)
F0-17
(Acceleration
time)
Frequency (f)
Time (t)
Running
command
Initial rotational speed of
the load motor = 0
F6-00 = 1 (Rotational speed
tracking restart)
Automatic
rotational speed
tracking detection
• F6-00 = 2 (Pre-excited start)
It is applicable only to inductive asynchronous motor. The AC drive performs pre-
excitation before start, improving quick response of the motor and meeting the
requirements of short acceleration time. The frequency curve in this mode is shown in
the following gure.
Figure 4-11 Frequency curve of pre-excited start
F6-07
(Acceleration/
Deceleration mode)
F0-12
(Frequency
upper limit)
F0-17
(Acceleration
time)
Frequency (f)
Time (t)
Running
command
F6-00 = 2 (Pre-excited start)
F6-04
(Startup frequency
holding time)
F6-03
(Startup frequency)
F6-06 (Pre-
excited time)
F0-12
(Frequency
upper limit)
F0-17
(Accelerati
on time)
Frequency (f)
Time (t)
Running
command
Default:
F6-03 = 0.00 Hz
F6-04 = 0.0s
F6-07 = 0
F6-00 = 2 (Pre-excited start)
F6-06 (Pre-
excited time)