Chapter 5 Function parameter
80
Ch
ap
ter 5
When the set frequency is lower than the lower limit frequency , the inverter operating
status can be selected through the parameter. PI160 provides three modes of operation to meet
the needs of a variety of applications.
F7.19 Droop control
0.00Hz
～
10.00Hz
0.00Hz
☆
This function is generally used for the load distribution that several motors drag the same
one load.
The droop control means that the inverter output frequency is decreased as the load is
increased , so that when several motors drag ( work for ) the same one load, each motor’s output
frequency much drops, which can reduce the load of the motor to balance evenly multiple
motor’s load.This parameter means the decreased value of output frequency when the inverter
outputs the rated load.
F7.20 Setting cumulative power-on arrival time
0h
～
36000h
0h
☆
When the total power-on time (F6.08 ) reaches the time set by F7.20 , the inverter
multifunction digital DO outputs ON signal.
F7.21 Setting cumulative running arrival time
0h
～
36000h
0h
☆
Used to set the running time of inverter.When the total power-on time (F6.07) reaches the
set time F7.21, the inverter multifunction digital DO outputs ON signal
F7.22 Start protection
off
0
0
☆
On
1
This parameter relates to the security features of the inverter
If this parameter is set to 1 , and if the running command is active (e.g. the terminal
running command is closed before power-on) when the inverter is in power-on, the inverter will
not respond to the running command, you must firstly cancel the running command, when the
running command is active again, the inverter will respond.
In addition, if the parameter is set to 1, and if the running command is active when the
inverter resets fault, the inverter will not respond to the running command, you must firstly
cancel the running command in order to eliminate running protection status.
The parameter is set 1, you can prevent the danger caused by that the inverter unknowingly
responds to the running command in the event of power-on and fault reset.
F7.23 Frequency detection value FDT1
0.00Hz
～
F0.19 (Maximum
frequency )
50.00Hz
☆
F7.24
Frequency detection hysteresis
value FDT1
0.0%
～
100.0%(FDT1 level)
5.0%
☆
The inverter's multifunction output DO will output ON signal when the operating
frequency is higher than the detected value, conversely DO output ON signal is canceled.
The above parameters is used to set the detected value of output frequency, and the
hysteresis value after the output is canceled. Of which, F7.24 is the percentage of the hysteresis
frequency in the detected value(F7.23). The below figure is the schematic diagram of FDT.
Time(t)
FDT hysteresis value
=F7.23*F7.24
Output frequency(Hz)
ON
Time(t)
Frequency arrival
detection signal
(DO, relay)
FDT level
Figure 5-21:Schematic diagram of FDT level
F7.25 Frequency reaches detection
0.00
～
100%(Maximum frequency)
0.0%
☆
