Megmeet MV300 Series - Start and Stop Control Parameters (Group P08)

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AVR means automatic voltage regulation.
Under the V/F control mode, when fast stop is need and there is no braking resistor, selecting “Disabled
only in deceleration situation” can remarkably reduce the possibility of over-voltage fault. If there is
braking resistor or the fast deceleration is not needed, please select “Always enabled”.
This function is applicable to the application of multiple drives driving the same load. It can realize the
uniform distribution of power.
When the load of some drive is heavier, the drive will automatically reduce the output frequency
according to the parameter set via this function to remove some load. During trial operation, this value
can be adjusted gradually from the small value.
6.8 Start and stop control parameters (Group P08)
Different start modes can be adopted for different applications.
0: Start from the startup frequency
The drive begins to run from the startup frequency P08.02 and accelerate to the set frequency after the
startup frequency retention time P08.03. If the motor is still rotating upon the startup of the drive, the
motor will be automatically braked to low speed before the acceleration.
1: Start form the startup frequency after braking
DC current is first supplied to perform DC magnetizing and DC braking on the motor. The volume and
time for the DC injection are set by P08.04 and P08.05. After the DC braking time expires, the drive
begins to run from the startup frequency P08.02 and accelerate to the set frequency after the startup
frequency retention time P08.03.
2: Speed tracking
The drive will identify the speed of the rotating motor and directly start from the identified frequency. The
current and voltage are smooth without any impact during the startup.
The startup delay time means that the drive begins to run after the startup time P08.01 if there is any
running command.
The drive begins to run from the startup frequency P08.02 and accelerates to the set frequency after the
startup frequency retention time P08.03.
 Note
For the heavy-load startup applications, it will facilitate the startup if the startup frequency and retention time
are properly set.
Startup DC braking current
0.0~100.0%
/
0.0~50.0%
(
0.0%
)
P08.04
Startup frequency retention time
0.00~10.00s
(
0.00s
)
P08.03
Startup frequency
0.00~60.00Hz
(
0.00Hz
)
P08.02
Startup delay time
0.00~30.00s
(
0.00s
)
P08.01
Startup mode
0~2
(
0
)
P08.00
Drooping control value
0~30.00 Hz
(
0.00Hz
)
P07.20