Chapter 5 Function parameter
78
Ch
ap
ter 5
it is required to accurately set the parameters of motor b0 group.
2: Asynchronous motor pre-excitation start
It is valid only for asynchronous motors, used to firstly create magnetic field before the motor
running. Please refer to the instructions of function code F3.05, F3.06 for pre-excitation current
and pre-excitation time
If the pre-excitation time is set to 0, the inverter will cancel the pre-excitation process, and
starts from the start frequency. If the pre-excitation time is not set to 0, the inverter will firstly
perform pre-excitation process and then starts so as to improve the dynamic response performance
of motor.
F3.01
Speed tracking mode
0~2
：
Reserve
3
★
Hard speed tracking mode
3
Hard speed tracking mode,automaticly detect and track motor speed ,no impact start to
the.rotating motor but smoothly.
F3.02
Speed tracking speed
1~100
20
☆
When speed tracking restart, select speed tracking of speed,
parameter smaller, the track faster. But is too small may cause tracking result is not reliable.
F3.03
Start frequency
0.00Hz~10.00Hz
0.00Hz
☆
F3.04
Hold time for start frequency
0.0s~100.0s
0.0s
★
When the inverter starts, firstly run at the start frequency, the running time is the hold time for
start frequency, afterwards run at the frequency reference.
The start frequency F3.03 is not limited by the lower limit frequency. But if the set target
frequency is less than the start frequency, the inverter does not start and keeps in the standby state.
The hold time for start frequency is inactive when switching between forward rotation and
reverse rotation The hold time for start frequency is not included in the acceleration time, but the
simple PLC run-time. Example 1:
F0.03
＝
0 the frequency source is set to digital reference
F0.01
＝
2.00Hz the digital set frequency is 2.00Hz
F3.03
＝
5.00Hz the start frequency is 5.00Hz
F3.04
＝
2.0s the hold time for start frequency is 2.0s, at this time, the inverter will be in
the standby state with the output frequency of 0.00Hz.
Example 2:
F0.03
＝
0 the frequency source is set to digital reference
F0.01
＝
10.00Hz the digital set frequency is 10.00Hz
F3.03
＝
5.00Hz the start frequency is 5.00Hz
F3.04
＝
2.0s the hold time for start frequency is 2.0s
At this point, the inverter accelerates to 5.00Hz for 2.0s, and then accelerates to the reference
frequency of 10.00Hz.
F3.05
DC Pre-excitation current
0%~100%
0%
★
F3.06
DC Pre-excitation time
0.0s~100.0s
0.0s
★
DC brake, generally used to stop and start the motor running. Pre-excitation is used to enable
the establishment of magnetic field induction motor and then start to improve the response speed.
DC brake is valid only in start-up mode for the direct start. At this point the drive to start first
by setting the DC braking current DC braking, DC braking time after the start and then start
running. If the set DC braking time is 0, no start directly after DC braking. DC braking current
increases, the greater the braking force.
If the start-up mode for the asynchronous machine to start pre-excitation, the drive pre-press
set excitation current pre-established field, after the set pre-magnetizing time before starting
operation. If the set pre-magnetizing time is 0, no pre-excitation processes started directly. DC
brake current / pre-excitation current, is the percentage of relative inverter rated current.
F3.07 Stop mode
Deceleration stop
0
0
☆
Free stop
1
F3.08
DC start frequency
0.00Hz~F0.19(maximun-frequency)
0.00Hz
☆
