Function Applications
-448-
Para. No. Name
Default
Value Range Description
F8-15
Action to take when
frequency is below
lower limit
0
0: Run at frequency
lower limit
1: Stop
2: Run at zero speed
-
4.1.3 Start/Stop Modes
4.1.3.1 Start Modes
The AC drive can be started in three modes: direct start, flying start, and pre-excitation start. You can
set F6-00 to select the startup mode of the AC drive.
Direct Start
When F6-00 is set to 0, the direct start mode is adopted, which applies to most load applications.
Figure 4-24 Timing diagram of direct start
Startup with startup frequency is applicable to lifting loads such as elevators and cranes.
Figure 4-25 Timing diagram of startup with startup frequency
Startup with DC injection braking is applicable to load applications where the motor is likely to rotate
at startup.
If the DC injection braking time is set to 0, the AC drive starts to run at the startup frequency. If the DC
injection braking time is not 0, the AC drive performs DC injection braking first and then starts to run at
the startup frequency. This mode applies to most small-inertia load applications where the motor is
likely to rotate at startup.
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