Start And Stop Control: F3.00-F3.15 - Powtran PI9000 series User Manual

Chapter 5 Function parameter
status when the digital output terminal is connected with the corresponding common
terminal, active when disconnected;
F2.16
DA1 zero bias coefficient -100.0% to +100.0%
F2.17
DA1 gain
F2.18
DA2 zero bias coefficient -100.0% to +100.0%
F2.19
DA2 gain
The above function codes are generally used for correcting the zero drift of analog
output and the deviation of output amplitude. It also be used to custom analog output curve.
If b represents the zero-bias, k represents he gain, Y represents the Actual output and X
represents standard output, then the Actual output:
Y=kX＋b。 Which, 100% the zero-bias coefficient of DA1, DA2 corresponds to 10V
( or 20mA), the standard output indicates the analog output amount corresponding to output
0V to 10V (or 0mA to 20mA) without zero bias and gain correction.
For example1: if the analog output is the operation frequency, it is expected to output 8V
with 0 frequency, and output 3V with maximum frequency, then the gain shall be set to "-
0.50", zero-bias shall be set to o"80%".
For example 2: If the analog output content is running frequency, hoping output 16mA
under 0 frequency, and output 6mA under maximum frequency, then the gain should be set as
"-0.50", zero offset should be set as "80%."

5-2-5.Start and stop control: F3.00-F3.15

Code Parameter name
F3.00
Start-up mode
0: Directly startup
If the start DC braking time is set to 0, the inverter starts running from the start
frequency. If the start DC braking time is not set to 0, the inverter firstly performs DC
braking and then starts running from the start frequency. Applicable for the small inertia load
and the application that the motor may rotate when starting.
1: Speed tracking restart
The inverter firstly judges the speed and direction of motor, and then starts at the tracked
motor frequency, smoothly starts the rotating motor without shocks. Applicable for the
momentary power cut and restart with high inertia loads. To ensure the performance of Speed
Tracking Restart, 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
-10.00 to +10.00
-10.00 to +10.00
Setting range
Direct startup
Speed tracking restart
Pre-excitation start (AC
asynchronous motor)
Start from
frequency
116
0.0%
1.00
0.00%
1.00
Factory
setting
0
1
0
2
stop
0
0
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