Powtran PI9000 series User Manual page 123

For the shortest time to complete the process of speed tracking, select the speed mode
for inverter tracking motor :
0: track downward from the frequency that power outage happens
Usually select this mode.
1: track upward from 0 frequency
For the case that power outage is for longer time and then restarts.
2: track downward from maximum frequency
For the general power generation load.
3：Rotate speed tracking method
Automatically detect trace the speed of the machine，no impact on the implementation
of rotation of motor smooth start.
3
"Superscript "means software version of C3.00 and above with MCU keyboard
have such function.
F3.02
Speed tracking value
When performing speed tracking restart, select speed tracking value.
Soft track:
The larger the parameter value, the faster tracking. But if the value is set to too large,
which may cause tracking unreliable.
Hard track:
The smaller the parameter value, the faster tracking. But if the value is set to too small,
which may cause tracking unreliable.
F3.03
Start frequency
Hold time for start
F3.04
frequency
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
F0.01＝2.00Hz
F3.03＝5.00Hz
F3.04＝2.0s
be in the standby state with the output frequency of 0.00Hz.
Example 2:
F0.03＝0
F0.01＝10.00Hz
F3.03＝5.00Hz
F3.04＝2.0s
At this point, the inverter accelerates to 5.00Hz for 2.0s, and then accelerates to the
Start from zero speed
Start from maximum
frequency
Rotate speed tracking
method
3
1 to 100
0.00Hz to 10.00Hz
0.0s to 100.0s
the frequency source is set to digital reference
the digital set frequency is 2.00Hz
the start frequency is 5.00Hz
the hold time for start frequency is 2.0s, at this time, the inverter will
the frequency source is set to digital reference
the digital set frequency is 10.00Hz
the start frequency is 5.00Hz
the hold time for start frequency is 2.0s
Chapter 5 Function parameter
3
117
1
2
3
20
0.00Hz
0.0s
☆
☆
★