Fig.6-37Over-voltage at stall
b2.05 Auto current limiting
threshold
b2.06 Frequency decrease rate
when current limiting
0.00 ～ 99.99Hz/s
【10.00Hz/s】
b2.07 Auto current limiting
selection
Auto current limiting function is used to limit the load
current smaller than the value defined by b2.05 in real
time. Therefore the drive will not trip due to surge
over-current. This function is especially useful for the
applications with big load inertia or big change of load.
b2.05 defines the threshold of auto current limiting. It is
a percentage of the drive’s rated current.
b2.06 defines the decrease rate of output frequency when
the drive is in auto current limiting status.
If b2.06 is set too small, overload fault may occur. If it is
set too big, the frequency will change too sharply and
therefore, the drive may be in generating status for long
time, which may result in overvoltage protection.
Auto current limiting function is always active in Acc or
Dec process. Whether the function is active in constant
speed operating process is decided by b2.07.
b2.07＝0, Auto current limiting function is disabled in
constant speed operating process;
b2.07＝1, Auto current limiting function is enabled in
constant speed operating process;
In auto current limiting process, the drive’s output
frequency may change; therefore, it is recommended not
to enable the function when the drive’s output frequency
is required stable.
When the auto current limiting function is enabled, if
b2.05 is set too low, the output overload capacity will be
impaired.
b2.08 Gain of slip
compensation
b2.09 Limit of slip
compensation
b2.10 Slip compensation
time constant
b2.11 Energy-saving function
b2.12 Frequency decrease
rate at voltage compensation
0.00~99.99Hz
【10.00 Hz/s】
b2.13Threshold of
zero-frequency operation
0.00~300.00Hz
【0.50 Hz/s】
This parameter is used together with No.9 function of
digital output terminal.
0：Auto operating mode.
The fan runs all the time when the drive is operating.
After the drive stops, its internal temperature detecting
program will be activated to stop the fan or let the fan
continue to run according to the IGBT’s temperature.
The drive will activate the internal temperature detecting
program automatically when it is operating,and run or
stop the fan according to the IGBT’s temperature.If the
fan is still running before the drive stop,then the fan will
continue running for three minutes after the drive stops
and then activate the internal temperature detecting
program.。
1：The fan operates continuously.
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